10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

(Mark One)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2020

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number 1-16335

Magellan Midstream Partners, L.P.

(Exact name of registrant as specified in its charter)

Delaware	73-1599053
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

One Williams Center, P.O. Box 22186, Tulsa, Oklahoma 74121-2186

(Address of principal executive offices and zip code)

(918) 574-7000

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Trading Symbol(s)	Name of Each Exchange on Which Registered
Common Units	MMP	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  Yes  ☒   No  o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.  Yes  ☐ No  ☒

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes  ☒  No  o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).  Yes  ☒  No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☒  Accelerated filer o  Non-accelerated filer o  Smaller reporting company ☐ Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of

the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C.

7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).  Yes  ☐ No  ☒

The aggregate market value of the registrant’s voting and non-voting common units held by non-affiliates computed by reference to the price at which the common units were last sold as of June 30, 2020 was $9,686,843,947.

As of February 17, 2021, there were 223,282,818 common units outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s Proxy Statement prepared for the solicitation of proxies in connection with the 2021 Annual Meeting of Limited Partners are to be incorporated by reference in Part III of this Form 10-K.

TABLE OF CONTENTS

		Page
	PART I
ITEM 1.	Business	3
ITEM 1A.	Risk Factors	17
ITEM 1B.	Unresolved Staff Comments	35
ITEM 2.	Properties	35
ITEM 3.	Legal Proceedings	35
ITEM 4.	Mine Safety Disclosures	35
	PART II
ITEM 5.	Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	36
ITEM 6.	Selected Financial Data	38
ITEM 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	42
ITEM 7A.	Quantitative and Qualitative Disclosures About Market Risk	55
ITEM 8.	Financial Statements and Supplementary Data	56
ITEM 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	110
ITEM 9A.	Controls and Procedures	110
ITEM 9B.	Other Information	110
	PART III
ITEM 10.	Directors, Executive Officers and Corporate Governance	111
ITEM 11.	Executive Compensation	111
ITEM 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	111
ITEM 13.	Certain Relationships and Related Transactions, and Director Independence	111
ITEM 14.	Principal Accountant Fees and Services	111
	PART IV
ITEM 15.	Exhibits and Financial Statement Schedules	112

Forward-Looking Statements

Except for statements of historical fact, all statements in this Annual Report on Form 10-K constitute forward-looking statements within the meaning of the federal securities laws. Forward-looking statements may be identified by words like “anticipates,” “believes,” “continue,” “could,” “estimates,” “expects,” “forecasts,” “goal,” “guidance,” “intends,” “may,” “might,” “plans,” “potential,” “projected,” “scheduled,” “should,” “will” and other similar expressions. The absence of such words or expressions does not necessarily mean the statements are not forward-looking. Although we believe our forward-looking statements are reasonable, statements made regarding future results are not guarantees of future performance and are subject to numerous assumptions, uncertainties and risks that are difficult to predict, including those described in Part I, Item 1A – Risk Factors of this Annual Report. Actual outcomes and results may be materially different from the results stated or implied in such forward-looking statements included in this report. You should not put any undue reliance on any forward-looking statement.

The following are among the important factors that could cause future results to differ materially from any expected, projected, forecasted, estimated or budgeted amounts, events or circumstances we have discussed in this report:

•overall demand for refined products, crude oil and liquefied petroleum gases;

•price fluctuations for refined products, crude oil and liquefied petroleum gases and expectations about future prices for these products;

•changes in the production of crude oil in the basins served by our pipelines;

•changes in general economic conditions, interest rates and price levels;

•changes in the financial condition of our customers, vendors, derivatives counterparties, lenders or joint venture co-owners;

•our ability to secure financing in the credit and capital markets in amounts and on terms that will allow us to execute our business strategy, refinance our existing obligations when due and maintain adequate liquidity;

•development and increasing use of alternative energy sources, including but not limited to natural gas, solar power, wind power, electric and battery-powered engines and geothermal energy, increased use of renewable fuels such as ethanol, biodiesel and renewable diesel, increased conservation or fuel efficiency, increased use of electric vehicles, as well as regulatory developments or other trends that could affect demand for our services;

•changes in population in the markets served by our refined products pipeline system and changes in consumer preferences, driving patterns or rates of automobile ownership;

•changes in the product quality, throughput or interruption in service of refined products or crude oil pipelines owned and operated by third parties and connected to our assets;

•changes in demand for transportation or storage in our refined products or crude oil segments;

•changes in supply and demand patterns for our facilities due to geopolitical events, the activities of the Organization of the Petroleum Exporting Countries (“OPEC”) and other non-OPEC oil producing countries with large production capacity, changes in U.S. trade policies or in laws governing the importing and exporting of petroleum products, technological developments or other factors;

•our ability to manage interest rate and commodity price exposures;

•changes in our tariff rates or other terms of service required by the Federal Energy Regulatory Commission or state regulatory agencies;

•shut-downs or cutbacks at refineries, oil fields, petrochemical plants or other customers or businesses that use or supply our services;

•the effect of weather patterns and other natural phenomena, including climate change, on our operations and demand for our services;

•an increase in the competition our operations encounter, including the effects of capacity over-build in the areas where we operate;

•the occurrence of natural disasters, epidemics, terrorism, sabotage, protests or activism, operational hazards, equipment failures, system failures or unforeseen interruptions;

•changes in general economic conditions, including market and macro-economic disruptions resulting from the COVID-19 pandemic and related governmental responses;

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•our ability to obtain adequate levels of insurance at a reasonable cost, and the potential for losses to exceed the insurance coverage we do obtain;

•the treatment of us as a corporation for federal or state income tax purposes or if we become subject to significant forms of other taxation or more aggressive interpretation or increased assessments under existing forms of taxation;

•our ability to identify expansion projects with acceptable expected returns or to complete identified expansion projects on time and at projected costs;

•our ability to make and integrate accretive acquisitions and joint ventures and successfully execute our business strategies;

•the effect of changes in accounting policies and uncertainty of estimates, including accruals and costs of environmental remediation;

•our ability to cooperate with and rely on our joint venture co-owners;

•actions by rating agencies concerning our credit ratings;

•our ability to timely obtain and maintain all necessary approvals, consents and permits required to operate our existing assets and to construct, acquire and operate any new or modified assets;

•our ability to promptly obtain all necessary services, materials, labor, supplies and rights-of-way required for maintenance and operation of our current assets and construction of our growth projects, without significant delays, disputes or cost overruns;

•risks inherent in the use and security of information systems in our business and implementation of new software and hardware;

•changes in laws and regulations or the interpretations of such laws that govern our gas liquids blending activities or changes regarding product quality specifications or renewable fuel obligations that impact our ability to produce gasoline volumes through our gas liquids blending activities or that require significant capital outlays for compliance;

•changes in laws and regulations to which we or our customers are or could become subject, including tax withholding requirements, safety, security, employment, hydraulic fracturing, derivatives transactions, trade and environmental, including laws and regulations designed to address climate change;

•the cost and effects of legal and administrative claims and proceedings against us, our subsidiaries or our joint ventures;

•the amount of our indebtedness, which could make us vulnerable to general adverse economic and industry conditions, limit our ability to borrow additional funds, place us at competitive disadvantages compared to our competitors that have less debt or have other adverse consequences;

•the potential that our internal controls may not be adequate, weaknesses may be discovered or remediation of any identified weaknesses may not be successful;

•the ability and intent of our customers, vendors, lenders, joint venture co-owners or other third parties to perform their contractual obligations to us;

•petroleum product supply disruptions;

•global and domestic repercussions from terrorist activities, including cyberattacks, and the government’s response thereto; and

•other factors and uncertainties inherent in the transportation, storage and distribution of petroleum products and the operation, acquisition and construction of assets related to such activities.

This list of important factors is not exhaustive. The forward-looking statements in this Annual Report speak only as of the date hereof, and we undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events, changes in assumptions or otherwise, unless required by law.

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MAGELLAN MIDSTREAM PARTNERS, L.P.

FORM 10-K

PART I

Item 1. Business

(a) General Development of Business

Unless indicated otherwise, the terms “our,” “we,” “us” and similar language refer to Magellan Midstream Partners, L.P. together with its subsidiaries. Magellan Midstream Partners, L.P. is a Delaware limited partnership formed in August 2000, and its common units are traded on the New York Stock Exchange under the ticker symbol “MMP.” Magellan GP, LLC, a wholly-owned Delaware limited liability company, serves as its general partner.

(b) [Reserved.]

(c) Narrative Description of Business

We are principally engaged in the transportation, storage and distribution of refined petroleum products and crude oil. As of December 31, 2020, our asset portfolio consisted of:

•our refined products segment, comprised of our approximately 9,800-mile refined petroleum products pipeline system with 54 connected terminals, as well as 25 independent terminals not connected to our pipeline system and two marine storage terminals (one of which is owned through a joint venture); and

•our crude oil segment, comprised of approximately 2,200 miles of crude oil pipelines, a condensate splitter and 37 million barrels of aggregate storage capacity, of which approximately 27 million barrels are used for contract storage. Approximately 1,000 miles of these pipelines, the condensate splitter and 30 million barrels of this storage capacity (including 24 million barrels used for contract storage) are wholly-owned, with the remainder owned through joint ventures.

Industry Background

The United States (“U.S.”) petroleum products transportation and distribution system links sources of crude oil supply with refineries and ultimately with end users of petroleum products. This system is comprised of a network of pipelines, terminals, storage facilities, waterborne vessels, railcars and trucks. For transportation of petroleum products, pipelines are generally the most reliable, lowest cost and safest alternative for intermediate and long-haul movements between different markets. Throughout the distribution system, terminals play a key role in facilitating product movements by providing storage, distribution, blending and other ancillary services.

The following terms are commonly used in our industry to describe products that we transport, store, distribute or otherwise handle through our petroleum pipelines and terminals:

•refined products are the output from crude oil refineries that are primarily used as fuels by consumers. Refined products include gasoline, diesel fuel, aviation fuel, kerosene and heating oil. Diesel fuel, kerosene and heating oil are also referred to as distillates;

•transmix is a mixture that forms when different refined products are transported in pipelines. Transmix is fractionated and blended into usable refined products;

•liquefied petroleum gases or LPGs are liquids produced as by-products of the crude oil refining process and in connection with natural gas production. LPGs include butane and propane;

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•blendstocks are products blended with refined products to change or enhance their characteristics such as increasing a gasoline’s octane or oxygen content. Blendstocks include alkylates, oxygenates and natural gasoline;

•crude oil, which includes condensate, is a naturally occurring unrefined petroleum product recovered from underground that is used as feedstock by refineries, splitters and petrochemical facilities; and

•renewable fuels, such as ethanol, biodiesel and renewable diesel, are fuels derived from living materials and typically blended with other refined products as required by government mandates.

We use the term petroleum products to describe any, or a combination, of the above-noted products.

Description of Our Businesses

REFINED PRODUCTS

Our refined products segment consists of our refined products pipeline system, our independent terminals and two marine terminals. Our refined products pipeline system is the longest common carrier pipeline system for refined products and LPGs in the U.S., extending approximately 9,800 miles from the Texas Gulf Coast and covering a 15-state area across the central U.S. The system includes approximately 47 million barrels of aggregate usable storage capacity at 54 connected terminals. Our network of independent terminals includes 25 refined products terminals with 6 million barrels of storage located primarily in the southeastern U.S. and connected to third-party common carrier interstate pipelines, including the Colonial and Plantation pipelines. Our Galena Park marine terminal is located along the Houston Ship Channel and has 13 million barrels of wholly-owned storage capacity and one million barrels of storage capacity that we own through a joint venture. Our Pasadena marine terminal, which we own through a joint venture, is also located along the Houston Ship Channel and has storage capacity of five million barrels.

Our refined products segment accounted for the following percentages of our consolidated revenue, operating margin and total assets:

	Year Ended December 31,
	2018	2019	2020
Percent of consolidated revenue	78%	76%	75%
Percent of consolidated operating margin	65%	62%	66%
Percent of consolidated total assets	61%	64%	64%

See Note 3 – Segment Disclosures in the accompanying consolidated financial statements in Item 8 for a description of the non-generally accepted accounting principles (“GAAP”) measure of operating margin and additional financial information about our refined products segment.

Operations. Transportation, Terminalling and Ancillary Services. During 2020, approximately 65% of the refined products segment’s revenue (excluding product sales revenue) was generated from transportation tariffs on volumes shipped on our refined products pipeline system. These transportation tariffs vary depending upon where the product originates, where ultimate delivery occurs and any applicable discounts. All transportation rates and discounts are in published tariffs filed with the Federal Energy Regulatory Commission (“FERC”) or appropriate state agency. Included as part of these tariffs are charges for terminalling and storage of products at 31 of our pipeline system’s 54 connected terminals. Revenue from terminalling and storage at the other 23 terminals on our refined products pipeline system is derived from privately negotiated rates. Under our tariffs, we are allowed to deduct prescribed quantities of the products our shippers transport on our pipelines, which are commonly referred to as “tender deductions,” to compensate us for lost product during shipment due to metering inaccuracies, intermingling of products between batches (transmix), evaporation or other events that result in volume shortages during the shipment process. In return for these tender deductions, our customers receive a guaranteed delivery of

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the gross volume of products they ship with us, less the amount of our tender deductions, irrespective of the actual amount of product shortages we incur during the shipment process.

In 2020, the products transported on our refined products pipeline system were comprised of 58% gasoline, 37% distillates and 5% aviation fuel and LPGs. Our refined products pipeline system generates additional revenue from providing pipeline capacity and tank storage services, as well as providing services such as terminalling, ethanol and biodiesel unloading and loading, additive injection, custom blending, laboratory testing and data services to shippers, which are performed under a mix of “as needed,” monthly and long-term agreements.

Our independent terminals generate revenue primarily by charging fees based on the amount of product delivered through our facilities and from ancillary services such as additive injections and ethanol blending. Our marine terminals generate revenue primarily by providing storage and related services, including dock capabilities.

Commodity-Related Activities. Substantially all of the transportation, throughput and storage services we provide are for third parties, and we do not take title to their products. We do take title to products related to tender deductions, product overages, gas liquids blending and fractionation activities. The sales of these products generate product sales revenue.

Our gas liquids blending activity primarily involves purchasing butane and blending it into gasoline, which creates additional gasoline available for us to sell. This activity is limited by seasonal changes in gasoline vapor pressure specification requirements and by the varying quality of the gasoline products delivered to us. When the differential between the cost of gas liquids and the price of gasoline fluctuates, the product margin we earn from these activities is impacted. We hedge the economic margin from this blending activity by entering into forward physical or exchange-traded gasoline futures contracts at the time we purchase the related gas liquids. These blending activities accounted for approximately 92% of the total product margin for the refined products segment during 2020.

We also operate three fractionators along our pipeline system that separate transmix into gasoline and diesel fuel. In addition to fractionating the transmix that results from our pipeline operations, we also purchase and fractionate transmix from third parties and sell the resulting refined products.

Product margin from commodity-related activities in our refined products segment was $220.3 million, $116.6 million and $107.3 million for the years ended December 31, 2018, 2019 and 2020, respectively. The amount of margin we earn from these activities and related hedges fluctuates with changes in petroleum prices (see Note 13–Derivative Financial Instruments to the consolidated financial statements included in Item 8 of this report for further information regarding our hedging activities). Product margin is a non-GAAP financial measure, but its components are determined in accordance with GAAP. Product margin, which is calculated as product sales revenue less cost of product sales, is used by management to evaluate the profitability of our commodity-related activities. The components of product margin included in operating profit, the nearest GAAP measurement, are provided in Note 3—Segment Disclosures to the consolidated financial statements included in Item 8 of this report.

Joint Venture Activities. We own a 50% interest in Powder Springs Logistics, LLC (“Powder Springs”), a joint venture with an affiliate of Colonial Pipeline Company, which owns a gas liquids blending system near Atlanta, Georgia. We serve as operator of the Powder Springs assets.

We own a 50% interest in Texas Frontera, LLC (“Texas Frontera”), a joint venture with an afffiliate of Petroleos Mexicanos (PEMEX), which owns approximately one million barrels of storage at our Galena Park terminal. We serve as operator of the Texas Frontera assets.

We own a 50% interest in MVP Terminalling, LLC (“MVP”), a joint venture with an affiliate of Valero Energy Corporation, which owns a refined products marine storage terminal along the Houston Ship Channel in Pasadena, Texas. The terminal includes five million barrels of storage, two ship docks and truck loading facilities. We serve as operator of the MVP assets.

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Markets and Competition. Shipments originate on our refined products pipeline system from direct connections to refineries or through interconnections with other pipelines or terminals for transportation and ultimate distribution to retail gasoline stations, truck stops, railroads, airports and other end users. Through direct refinery connections and interconnections with other interstate pipelines, our refined products system can access approximately 45% of U.S. refining capacity, and in particular is well-connected to Texas Gulf Coast and Mid-Continent refineries. As a result of its extensive connections to multiple refining regions, our pipeline system is well positioned to accommodate demand or supply shifts that may occur.

Our system is dependent on the ability of refiners and marketers to meet the demand for refined products in the markets they serve through shipments on our pipeline system. Demand for refined products is influenced by many factors, including driving patterns and consumer preferences, economic conditions, population changes, government regulations, changes in vehicle fuel efficiency and development of alternative energy sources. The demand for refined products in the market areas served by our pipeline system has historically been stable. We generally rely on recent historical trends on our system and third-party forecasts in assessing future refined products demand, and those forecasts vary both by forecaster and by product. While increases in vehicle efficiency and more widespread penetration of electric vehicles are generally expected to reduce demand for gasoline over time, distillate demand is expected to be less affected, while demand for aviation fuel is expected to grow. Projections published by the Energy Information Administration in February 2021 suggest that overall demand for refined products in the market areas served by our pipeline system, primarily the West North Central and West South Central census districts, will decline by approximately 0.6% annually over the next ten years, when compared to the more historical demand levels of 2019.

In 2020, approximately 62% of the products transported on our refined products pipeline system originated from direct refinery connections and 38% originated from connections with other pipelines or terminals. Our system is directly connected to and receives product from the following 17 refineries:

Major Origins—Refineries (Listed Alphabetically)

Company	Refinery Location
Cenovus Energy	Superior, WI
CHS	McPherson, KS
CVR Energy	Coffeyville, KS
CVR Energy	Wynnewood, OK
Flint Hills Resources	Pine Bend, MN
HollyFrontier	El Dorado, KS
HollyFrontier	Tulsa, OK
Marathon	St. Paul, MN
Marathon	El Paso, TX
Marathon	Galveston Bay, TX
Par Pacific	Newcastle, WY
Phillips 66	Ponca City, OK
Sinclair	Evansville, WY
Suncor Energy	Commerce City, CO
Valero	Ardmore, OK
Valero	Houston, TX
Valero	Texas City, TX

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Our system is also supplied by connections to multiple pipelines and terminals, including those shown in the table below:

Major Origins—Pipelines and Terminals (Listed Alphabetically)

Pipeline/Terminal	Connection Location	Source of Product
BP	Manhattan, IL	Whiting, IN refinery
CHS	Fargo, ND	Laurel, MT refinery
Delek	El Paso and Odessa, TX	Big Spring, TX refinery
Explorer	Mt. Vernon, MO; Glenpool, OK; Dallas, TX; East Houston, TX; Pasadena, TX	Various Gulf Coast refineries
Holly Energy Partners	Duncan, OK; El Paso, TX	Big Spring, TX refinery, Artesia, NM refinery
Kinder Morgan	Galena Park and Pasadena, TX	Various Gulf Coast refineries and imports
Magellan	Galena Park, TX	Various Gulf Coast refineries and imports
Mid-America (Enterprise)	El Dorado, KS	Conway, KS storage
NuStar Energy	Denver, CO; El Dorado, KS; Minneapolis, MN	Various OK & KS refineries, Mandan, ND refinery, McKee, TX refinery
ONEOK	Des Moines, IA; Wayne, IL; Plattsburg, MO	Bushton, KS storage and Chicago, IL area refineries
Phillips 66	Denver, CO; Kansas City, KS; Pasadena, TX; Casper, WY	Borger, TX refinery, various Billings, MT area refineries, Sweeney, TX refinery
Shell	East Houston, TX	Deer Park, TX refinery

In certain markets, barge, truck or rail provide an alternative source for transporting refined products; however, pipelines are generally the most reliable, lowest cost and safest alternative for refined products movements between different markets. As a result, our pipeline system’s top competitors are other pipelines that serve the same markets.

Competition with other pipeline systems is based primarily on transportation charges, quality of customer service, proximity to end users and long-standing customer relationships. However, given the different supply sources on each pipeline, commodity prices at either the origin or destination point on a pipeline may outweigh transportation costs when customers choose which pipeline to use.

Another form of competition for pipelines is the use of exchange agreements among shippers. Under these agreements, a potential shipper agrees to supply a market near its refinery or terminal in exchange for receiving supply from another refinery or terminal in a different market. These agreements allow the two parties to reduce or eliminate the volumes transported and, therefore, the transportation fees paid to us. We compete with these alternatives through price incentives and through long-term commercial arrangements with potential exchange partners.

Government mandates increasingly require the use of renewable fuels, including ethanol and biodiesel. Due to technical and operational concerns, pipelines have historically not shipped ethanol or biodiesel in significant quantities, but rather are transported by railroad, truck or barge to terminal facilities where they are then blended into the fuel stream.  The increased use of ethanol and biodiesel has and will continue to compete with shipments on our pipeline system.  Our terminals have the necessary infrastructure to blend ethanol and biodiesel with refined products, and we earn revenue for these services and continue to evaluate the potential to move ethanol and biodiesel blends, along with other renewable fuels, on our pipeline system.

Our independent terminals receive product primarily from the interstate pipelines to which they are connected and serve the retail, industrial and commercial sales markets along those pipelines. Demand for our services is driven primarily by end user demand for refined products in those markets. Our terminals compete with other

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independent terminal operators as well as integrated oil companies on the basis of terminal location and versatility, services provided and price.

Our marine storage terminals compete with other terminals with respect to location, price, versatility and services provided. The competition primarily comes from integrated petroleum companies, refining and marketing companies, independent terminal companies and distribution companies with marketing and trading operations.

Customers and Contracts. Our refined products pipeline system provides services to several different types of customers, including refiners, wholesalers, retailers, traders, railroads, airlines and regional farm cooperatives. End markets for refined products deliveries are primarily retail gasoline stations, truck stops, farm cooperatives, railroad fueling depots, military bases and commercial airports. Published tariffs serve as contracts, and shippers nominate the volume to be shipped up to a month in advance. In addition, we enter into agreements with shippers that commonly result in payment, volume or term commitments in exchange for reduced tariff rates or expansion capital spending on our part. For 2020, approximately 45% of the shipments on our pipeline system were subject to these supplemental agreements. The average remaining life of these agreements was approximately four years as of December 31, 2020. While many of these supplemental agreements do not represent guaranteed volumes, they do reflect a significant level of shipper commitment to our refined products pipeline system.

For the year ended December 31, 2020, our refined products pipeline system had approximately 60 transportation customers. The top 10 shippers primarily included independent refining companies, integrated oil companies and traders. Revenue attributable to these top 10 shippers for the year ended December 31, 2020 represented 37% of total revenue for our refined products segment and 52% of revenue excluding product sales.

Customers of our independent terminals include refiners, retailers, wholesalers and traders. Contracts vary in term and commitment and typically renew automatically, unless the customer elects to terminate, at the end of each contract period.

Customers of our marine terminals include refiners, marketers and traders. As of December 31, 2020, approximately 78% of our usable marine storage capacity, including the storage capacity of our joint ventures, was under contract with an average remaining life of approximately two years. These contracts obligate the customer to pay for terminal capacity reserved even if not used by the customer.

Product sales are primarily to trading and marketing companies active in the markets we serve. These sales agreements are generally short-term in nature.

CRUDE OIL

Our crude oil segment is comprised of approximately 2,200 miles of crude oil pipelines, a condensate splitter and storage facilities with an aggregate storage capacity of approximately 37 million barrels, of which 27 million barrels are used for contract storage. Approximately 1,000 miles of these pipelines, the condensate splitter and 30 million barrels of this storage capacity (including 24 million barrels used for contract storage) are wholly-owned, with the remainder owned through joint ventures.

The joint ventures in our crude oil segment are BridgeTex Pipeline Company, LLC (“BridgeTex”), Double Eagle Pipeline LLC (“Double Eagle”), HoustonLink Pipeline Company, LLC (“HoustonLink”), Saddlehorn Pipeline Company, LLC (“Saddlehorn”) and Seabrook Logistics, LLC (“Seabrook”).

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Our crude oil segment accounted for the following percentages of our consolidated revenue, operating margin and total assets:

	Year Ended December 31,
	2018	2019	2020
Percent of consolidated revenue	22%	24%	25%
Percent of consolidated operating margin	35%	37%	34%
Percent of consolidated total assets	36%	34%	35%

See Note 3 – Segment Disclosures in the accompanying consolidated financial statements in Item 8 for additional financial information about our crude oil segment.

Operations. Our crude oil assets are strategically located to serve crude oil supply, trading and demand centers. Revenue is generated primarily through transportation tariffs on our crude oil pipelines, storage fees from our crude oil terminals, providing pipeline capacity and tolling fees from our condensate splitter. In addition, we earn revenue for ancillary services including terminal throughput fees. We generally do not take title to the products we ship or store for our crude oil customers. Our tariffs provide for tender deductions to compensate us for lost product during shipment due to metering inaccuracies, evaporation or other events that result in volume losses during the shipment process, and we take title to these products. We also take title to volumes shipped in connection with our crude oil marketing activities.

Our 450-mile Longhorn pipeline has the capacity to transport approximately 275,000 barrels per day (“bpd”) of crude oil from the Permian Basin in West Texas to Houston, Texas. Shipments originate on the Longhorn pipeline via trucks or interconnections with crude oil gathering systems owned by third parties and are delivered to our terminal at East Houston or to various points on the Houston Ship Channel, including multiple refineries connected to our Houston distribution system.

Our East Houston terminal includes approximately nine million barrels of crude oil storage, with approximately six million barrels used for contract storage and three million barrels dedicated to the operation of the Longhorn and BridgeTex pipelines. (See discussion of our BridgeTex joint venture under Joint Venture Activities below.) Our East Houston terminal is also connected to our Houston distribution system and to third-party pipelines. Currently, Argus’ West Texas Intermediate (“WTI”) Houston price assessment is based on trades at the terminal, and the terminal is the delivery point for the Permian WTI Crude Oil futures contract traded on the Intercontinental Exchange. We expect the nature and availability of crude oil futures contracts and market price assessments to continue evolving in the Houston market. We will continue to pursue opportunities as this market develops.

Our Houston distribution system consists of more than 100 miles of pipeline that connect our East Houston terminal through several interchanges to various points, including multiple refineries throughout the Houston area and crude oil import and export facilities, including through the facility owned by Seabrook discussed below. In addition, it is directly connected to other third-party crude oil pipelines providing us access to crude oil from the Permian and Eagle Ford basins, the strategic crude oil trading hub in Cushing, Oklahoma and crude oil imports.

Our Cushing terminal consists of approximately 13 million barrels of crude oil storage, all of which is used for contract storage. The facility primarily receives and distributes crude oil via the multiple common carrier pipelines that terminate in and originate from the Cushing crude oil trading hub, including the pipeline owned by our Saddlehorn joint venture discussed below, as well as short-haul pipeline connections with neighboring crude oil terminals.

We own approximately 400 miles of pipeline in Kansas and Oklahoma used for crude oil service. A portion of these pipelines is leased to third parties, and we earn revenue from these pipeline segments for capacity leased even if not used by the customers.

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Our Corpus Christi terminal includes approximately four million barrels of storage, with a portion used for contract storage and a portion used in conjunction with our Double Eagle joint venture discussed below. This terminal receives product primarily from barges and pipelines that connect to our terminal for further distribution to end users by trucks, pipeline or waterborne vessels. Our 50,000 bpd condensate splitter with approximately two million barrels of related storage is also located at our terminal in Corpus Christi.

Crude Oil Marketing Activities. Our crude oil marketing activities primarily involve purchasing and selling crude oil to be shipped on our Texas crude oil pipelines to facilitate intrastate shipments and maximize profitability on our crude oil pipeline assets. Earnings from these activities are primarily based on the differential in market prices for crude oil between our origin and destination points.

Joint Venture Activities. We own a 30% interest in BridgeTex, a joint venture with an affiliate of Plains All American Pipeline, L.P. (“Plains”) and an affiliate of OMERS Infrastructure Management Inc. BridgeTex owns an approximately 400-mile pipeline currently capable of transporting up to 440,000 bpd of Permian Basin crude oil to our East Houston terminal. We serve as operator of the BridgeTex pipeline. We also have a long-term lease agreement with BridgeTex to provide it with capacity on our Houston distribution system.

We own a 50% interest in Double Eagle, a joint venture with an affiliate of Kinder Morgan, Inc. (“Kinder”), that transports condensate from the Eagle Ford basin in South Texas via an approximately 200-mile pipeline to our terminal in Corpus Christi or to an inter-connecting pipeline that transports product to the Houston area. An affiliate of Kinder serves as the operator of the Double Eagle pipeline. We have entered into a terminal throughput agreement which provides Double Eagle access to our Corpus Christi terminal.

We own a 50% interest in HoustonLink, a joint venture with an affiliate of TC Energy Corporation (“TC Energy”). HoustonLink owns a crude oil pipeline connecting TC Energy’s Houston terminal, which is a termination point for TC Energy’s Marketlink pipeline, to our nearby East Houston terminal. We serve as operator of the HoustonLink pipeline.

We own a 30% interest in Saddlehorn, a joint venture with an affiliate of Plains, an affiliate of Western Midstream Partners, L.P. and an affiliate of Black Diamond Gathering LLC (which is majority-owned by Noble Midstream Partners LP). Saddlehorn owns an undivided joint interest in an approximately 600-mile pipeline, which delivers various grades of crude oil from the DJ Basin as well as other Rocky Mountain production regions to storage facilities in Cushing, including our Cushing terminal. Saddlehorn currently has the capacity to deliver up to 290,000 bpd of crude oil, following the completion of a 100,000 bpd expansion in late 2020. We serve as operator of Saddlehorn and have also entered into contracts to provide storage for Saddlehorn at our Cushing terminal.

We own a 50% interest in Seabrook, a joint venture with an affiliate of LBC Tank Terminals, LLC (“LBC”). Seabrook owns approximately three million barrels of crude oil storage (two million barrels of which is used for contract storage) located in Seabrook, Texas, a pipeline connecting Seabrook’s storage facilities to an existing third-party pipeline that connects to a Houston-area refinery and another pipeline connecting its facility to our Houston distribution system. LBC serves as operator of the Seabrook terminal and the general and administrative operator of the entity, while we serve as operator of the Seabrook pipelines. In addition, we have a long-term lease agreement with Seabrook that we utilize to provide our customers with crude oil storage capacity and dock access for crude oil imports and exports on the Texas Gulf Coast.

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Markets and Competition. Market conditions experienced by our crude oil pipelines vary significantly by location. The Longhorn and BridgeTex pipelines deliver Permian Basin production to trading and demand centers in the Houston area, and consequently depend on the level of production in the Permian Basin for supply. Demand for shipments to the Houston area is driven primarily by the utilization of West Texas crude oil by Gulf Coast refineries and the price for crude oil on the Gulf Coast relative to its price in alternative markets, including export markets. Permian Basin production varies based on numerous factors including overall crude oil prices and changes in costs of production, while Gulf Coast demand for Permian Basin production also fluctuates based on relative prices for competing crude oil or changes by refineries to their crude oil processing slates, as well as by overall domestic and international demand for petroleum products. The Longhorn and BridgeTex pipelines compete with alternative outlets for Permian Basin production, including pipelines that transport crude oil to the Cushing crude oil trading hub as well as other pipelines that transport Permian Basin crude to Houston, Corpus Christi or Nederland. These pipelines also compete with truck and rail alternatives for Permian Basin barrels. Further, these pipelines indirectly compete with other alternatives for delivering similar quality crude oil to the Gulf Coast, including pipelines from other producing regions such as the Mid-Continent, Bakken, Eagle Ford or Gulf of Mexico, as well as waterborne imports. Competition is based primarily on tariff rates, proximity to supply sources and demand centers, connectivity, service offerings, crude quality and customer relationships.

Volumes transported on our Houston distribution system are driven by supply of crude oil delivered into our system from the basins connected by our pipeline or third party pipelines, as well as by takeaway demand from the various connections off our system in the Houston area. Our Houston distribution system competes with other distribution systems in the Houston area based primarily on rates, connectivity to supply sources and demand centers, customer service and customer relationships.

Our crude oil storage in Cushing serves customers who value Cushing’s location as an interchange point for numerous interstate pipelines, including Saddlehorn, and its status as a crude oil trading hub. Demand for crude oil storage in Cushing could be affected by changes in crude oil pipeline flows that change the volume of crude oil that flows through or is stored in Cushing, as well as by developments of alternative trading hubs that reduce Cushing’s relative importance. In addition, demand for our storage services in Cushing could be affected by crude oil price volatility or price structures or by regulatory or financial conditions that affect the ability of our customers to store or trade crude oil. We compete in Cushing with numerous other storage providers, with competition based on a combination of connectivity, storage rates and other terms, customer service and customer relationships.

The Double Eagle pipeline depends on condensate production from the Eagle Ford basin for its supply and competes primarily with other pipelines and supply alternatives that are capable of transporting condensate from the Eagle Ford production area. Competition is based primarily on tariff rates, connectivity, customer service and customer relationships. Eagle Ford production may vary based on numerous factors including overall crude oil prices and changes in costs of production. Demand for our storage at Corpus Christi is subject to similar market conditions and competitive forces.

Our condensate splitter at our Corpus Christi terminal depends on condensate production and overall demand for products derived from condensate, including naphthas and distillates. Our splitter competes with other facilities in the Gulf Coast region including other splitters and refineries, as well as export alternatives.

The Saddlehorn pipeline depends on crude oil production primarily from the DJ Basin and broader Rocky Mountain region for its supply and competes primarily with other pipelines and supply alternatives that are capable of transporting crude oil from the DJ Basin and Rocky Mountain production area. Competition is based primarily on tariff rates, connectivity, customer service and customer relationships. The demand for Saddlehorn’s services could be affected by changes in DJ Basin crude oil production and additional investment in competing transportation alternatives out of the basin, as well as the status of Cushing as a crude oil trading hub. DJ Basin production may vary based on numerous factors including overall crude oil prices and changes in costs of production.

Customers and Contracts. We ship crude oil as a common carrier for several different types of customers, including crude oil producers and end users, such as refiners and marketing and trading companies, including our marketing affiliate. Published transportation tariffs filed with the FERC or the appropriate state agency serve as

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contracts to ship on our crude oil pipelines, and shippers nominate volumes to be transported up to a month in advance, with rates varying by origin, destination and product grade. We typically reserve at least 10% of the shipping capacity of our pipelines for spot shippers. Spot barrel movements on our pipelines generally ship at higher rates than those charged to committed shippers. Generally, we seek to secure long-term commitments to support our long-haul crude oil pipeline assets. The majority of the capacity on our Longhorn pipeline is supported by take-or-pay commitments. At December 31, 2020, approximately 70% of the capacity of our Longhorn pipeline was subject to long-term commitments with an average remaining life of approximately six years. Our Houston distribution system is generally not subject to long-term agreements. As of December 31, 2020, approximately 90% of our crude oil storage available for contract was under agreements with terms in excess of one year or that renew on an annual basis at our customers’ option. The average remaining life of our storage contracts was approximately three years as of December 31, 2020. These agreements obligate the customer to pay for storage capacity reserved even if not used by the customer. Our BridgeTex and Saddlehorn joint ventures also have long-term take-or-pay customer commitments. At December 31, 2020, approximately 80% of the capacity of the BridgeTex pipeline was subject to long-term commitments with an average remaining life of four years. At December 31, 2020, approximately 75% of the capacity of the Saddlehorn pipeline was subject to long-term commitments with an average remaining life of six years. Additionally, we have a tolling agreement with one customer for the exclusive use of our condensate splitter in Corpus Christi with a remaining life of approximately two years.

GENERAL BUSINESS INFORMATION

Commodity Positions and Hedges

Our policy is generally to purchase only those products necessary to conduct our normal business activities. We generally do not acquire physical inventory, futures contracts or other derivative instruments for the purpose of speculating on commodity price changes. Our gas liquids blending, fractionation and crude oil marketing activities result in our carrying significant levels of petroleum products inventories. In addition, we hold positions related to tender deductions and product overages. We use forward physical contracts and derivative instruments to hedge against commodity price changes and manage risks associated with our various commodity purchase and sale activities. Our risk management policies and procedures are designed to monitor our derivative instrument positions, as well as physical volumes, grades, locations, delivery schedules and storage capacity to help ensure that our hedging activities address the risks inherent in our commodity positions.

Regulation

Tariff Regulation. Our interstate common carrier pipeline operations are subject to rate regulation by the FERC under the Interstate Commerce Act, the Energy Policy Act of 1992 and rules and orders promulgated pursuant thereto. FERC regulation requires that interstate liquids pipeline rates be filed with the FERC, be posted publicly, be nondiscriminatory, and be “just and reasonable.” Rate changes and the overall level of our rates may be subject to challenge by the FERC or shippers. If the FERC determines that our rates are not just and reasonable, we may be required to reduce our rates and pay refunds for up to two years of over-earning. The rates on approximately 40% of the shipments on our refined products pipeline system are regulated by the FERC primarily through an index methodology. For the five-year period beginning July 1, 2021, the indexing method provides for annual changes in rates by a percentage equal to the change in the producer price index for finished goods (“PPI-FG”) plus 0.78%. As an alternative to cost-of-service or index-based rates, interstate liquids pipeline companies may establish rates by obtaining authority to charge market-based rates in competitive markets or by negotiation with unaffiliated shippers. Approximately 60% of our refined products pipeline system’s markets are either subject to regulations by the states in which we operate or are approved for market-based rates by the FERC, and in both cases these rates can generally be adjusted at our discretion based on market factors. Most of the tariffs on our long-haul crude oil pipelines are established by negotiated rates that provide for annual adjustments in line with changes in the FERC index, subject to certain modifications.

Some shipments on our pipeline systems that move within a single state are considered to be in intrastate commerce. The rates, terms and conditions of service offered by our intrastate pipelines are subject to certain

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regulations with respect to such intrastate transportation by state regulatory authorities in the states of Colorado, Illinois, Kansas, Minnesota, Oklahoma, Texas and Wyoming. Such state regulatory authorities could limit our ability to increase our rates or to set rates based on our costs, or could order us to reduce our rates and require the payment of refunds to shippers if our rates are found to have been unjust.

Commodity Market Regulation. Our conduct in petroleum markets and in hedging our exposure to commodity price fluctuations must comply with various laws and regulations that prohibit market manipulation, including those under the Energy Independence and Security Act of 2007 and the Commodity Exchange Act, as well as regulations promulgated by the Commodity Futures Trading Commission and the Federal Trade Commission.

Renewable Fuel Standard.  We are an obligated party under the Renewable Fuel Standard (“RFS”) promulgated by the Environmental Protection Agency (“EPA”) and are required to satisfy our Renewable Volume Obligation (“RVO”) on an annual basis. To meet the RVO, the gasoline products we produce in our gas liquids blending activities must either contain the mandated renewable fuel components, or credits must be purchased to cover any shortfall. We met our RVO requirements for 2020 and expect to satisfy the requirements for 2021 through the purchase of credits, known as Renewable Identification Numbers (“RINs”).  As the RFS program is currently structured, the RVO of all obligated parties will increase over time unless adjusted by the EPA. The ability to incorporate increasing volumes of renewable fuel components into fuel products and the availability of RINs may be limited, which could increase our costs to comply with the RFS standards or limit our ability to blend.

Income Taxes. We are a partnership for income tax purposes and, therefore, are not subject to federal or state income taxes for most of the states in which we operate. The tax on our net income is borne by our unitholders through allocation to them of their share of our taxable income. Net income for financial statement purposes may differ significantly from taxable income allocated to unitholders because of differences between the tax basis and financial reporting basis of assets and liabilities and the taxable income allocation requirements under our partnership agreement. The aggregate difference in the basis of our net assets for financial and tax reporting purposes cannot be readily determined because information regarding each unitholder’s tax attributes is not available to us.

As a publicly traded limited partnership, we are subject to a statutory requirement that our “qualifying income” (as defined by the Internal Revenue Code, related Treasury Regulations and Internal Revenue Service pronouncements) exceed 90% of our total gross income, determined on a calendar year basis. If our qualifying income does not meet this statutory requirement, we could be taxed as a corporation for federal and state income tax purposes. For the years ended December 31, 2018, 2019 and 2020, our qualifying income met the statutory requirement.

Environmental, Maintenance, Safety & Security

General. The operation of our pipeline systems, terminals and associated facilities is subject to strict and complex laws and regulations relating to the protection of the environment and workplace safety. These laws and regulations govern many aspects of our business including the work environment, the generation and disposal of waste, discharge of process and storm water, air emissions, remediation requirements and facility design requirements to protect against releases into the environment. We believe our assets are designed, operated and maintained in material compliance with these laws and regulations.

Environmental. Our estimates for remediation liabilities assume that we will be able to use traditionally acceptable remediation and monitoring methods, as well as associated engineering or institutional controls, to comply with applicable regulatory requirements. These estimates include the cost of performing environmental assessments, remediation and monitoring of the impacted environment such as soils, groundwater and surface water conditions. Our recorded environmental liabilities are estimates and total remediation costs may differ from current estimated amounts.

We may experience future releases of regulated materials into the environment or discover historical releases that were previously unidentified. While an asset integrity and maintenance program designed to prevent, promptly

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detect and address releases is an integral part of our operations, damages and liabilities arising out of any environmental release from our assets identified in the future could have a material adverse effect on our results of operations, financial position or cash flow.

Liabilities recognized for estimated environmental costs were $14.9 million and $14.3 million at December 31, 2019 and 2020, respectively. Environmental liabilities have been classified as current or noncurrent based on management’s estimates regarding the timing of actual payments. We have insurance policies that provide coverage for remediation costs and liabilities arising from sudden and accidental releases of products applicable to all of our assets.

Hazardous Substances and Wastes. Our operations are subject to various laws and regulations that relate to the release of hazardous substances and solid wastes into water or soils. For instance, the Comprehensive Environmental Response, Compensation and Liability Act, as amended (“CERCLA”), also known as the Superfund law, and comparable state laws impose liability, without regard to fault or the legality of the original conduct, on certain classes of persons who are considered to be responsible for the release of a hazardous substance into the environment.

Our operations generate wastes, including hazardous wastes that are subject to the requirements of the Resource Conservation and Recovery Act (“RCRA”) and comparable state statutes. We are not currently required to comply with a substantial portion of the RCRA requirements as our operations routinely generate only small quantities of hazardous wastes, and we are not a hazardous waste treatment, storage or disposal facility operator that is required to obtain a RCRA hazardous waste permit. While RCRA currently exempts a number of wastes from being subject to hazardous waste requirements, including many oil and gas exploration and production wastes, the EPA could consider the adoption of stricter disposal standards for non-hazardous wastes. Moreover, it is possible that additional wastes, which could include non-hazardous wastes currently generated during operations, may be designated as hazardous wastes. Hazardous wastes are subject to more rigorous and costly storage and disposal requirements than non-hazardous wastes. Changes in the regulations could materially increase our expenses.

We own or lease properties where hydrocarbons have been handled for many years. Although we have utilized operating and disposal practices that were standard in the industry at the time, hydrocarbons or other wastes may have been disposed of or released on, under or from the properties owned or leased by us or on or under other locations where these wastes have been taken for disposal. In addition, many of these properties were previously operated by third parties whose treatment and disposal or release of hydrocarbons or other wastes was not under our control. These properties and wastes disposed thereon may be subject to CERCLA, RCRA and analogous state laws. Under these laws, we could be required to remove or remediate previously disposed wastes, including wastes disposed of or released by prior owners or operators, to remediate contaminated property, including groundwater contaminated by prior owners or operators, or to make capital improvements to prevent future contamination.

Water Discharges. Our operations can result in the discharge of pollutants, including crude oil and refined products, and are subject to the Oil Pollution Act (“OPA”) and Clean Water Act (“CWA”). The OPA and CWA subject owners of facilities to strict, joint and potentially significant liability for removal costs and certain other consequences of a product spill such as natural resource damages, where the product spills into regulated waters, along federal shorelines or in the exclusive economic zone of the U.S. In the event of a product spill from one of our facilities into regulated waters, substantial liabilities could be imposed. States in which we operate have also enacted similar laws. The CWA imposes restrictions and strict controls regarding the discharge of pollutants into regulated waters. This law and comparable state laws require that permits be obtained to discharge pollutants into regulated waters and impose substantial potential liability for non-compliance. Compliance with these laws is not expected to have a material adverse effect on our business, financial position, results of operations or cash flows.

Air Emissions. Our operations are subject to the federal Clean Air Act (“CAA”) and comparable state and local laws and regulations, which regulate emissions of air pollutants from various industrial sources, including certain of our facilities, and impose various operating, monitoring and reporting requirements. Such laws and regulations may require that we obtain pre-approval for the construction or modification of certain projects or facilities expected to produce or increase air emissions, obtain and strictly comply with air permits and regulations

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containing various emissions and operational limitations and utilize specific emission control technologies to limit emissions. Failure to comply with these requirements could subject us to monetary penalties, injunctions, conditions or restrictions on operations and, potentially, criminal enforcement actions. We may be required to incur certain capital expenditures in the future for air pollution control equipment in connection with obtaining and maintaining operating permits and approvals for air emissions. We believe that our operations will not be materially adversely affected by such requirements.

Greenhouse Gas Emissions. The EPA has adopted regulations under existing provisions of the CAA that require certain large stationary sources to obtain pre-construction permits and operating permits for greenhouse gas emissions. In addition, the EPA requires the monitoring and reporting of greenhouse gas emissions from certain large greenhouse gas emissions sources, including petroleum facilities.

Federal and state legislative and regulatory initiatives may attempt to further address climate change or control or limit greenhouse gas emissions. Although it is not possible at this time to predict how they would impact our business, any such future laws or regulations could adversely affect demand for the products that we transport, store and distribute. Depending on the particular programs adopted, they could also increase our costs to operate and maintain our facilities by requiring that we measure and report our emissions, install new emission controls on our facilities, acquire allowances to authorize our emissions, pay any taxes related to our emissions and administer and manage an emissions program, among other things. We may be unable to include some or all of such increased costs in the rates charged to our customers and any such recovery may depend on events beyond our control, including the outcome of future rate proceedings before the FERC or state regulatory agencies and the provisions of any final legislation or implementing regulations.

Finally, many scientific studies conclude that increasing concentrations of greenhouse gases in the Earth’s atmosphere affect climate changes, which could result in the increased frequency and severity of storms, floods and other climatic events. If any such effects were to occur, there may be an increased potential for adverse effects on our assets and operations.

Pipeline Safety and Maintenance. Our pipeline systems are subject to regulation by the U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration (“PHMSA”) under the Hazardous Liquid Pipeline Safety Act of 1979, as amended (“HLPSA”). The HLPSA prescribes and enforces minimum federal safety standards for the transportation of hazardous liquids by pipeline, including the design, construction, testing, operation and maintenance, spill response planning, and overall reporting and management related to our pipeline facilities. In addition to the amended HLPSA covered in Title 49 of the Code of Federal Regulations, subsequent statutes provide the framework for the pipeline hazardous liquid safety program and include provisions related to PHMSA’s authorities, administration, and regulatory activities. Most recently, the Protecting Our Infrastructure of Pipelines and Enhancing Safety Act of 2020 would require PHMSA to, among other things, issue regulations addressing idled pipelines, the safety of gas gathering pipelines, minimum performance standards for methane leak detection and repair, and gas distribution pipelines’ emergency response plans, responses to over-pressurization events, and maintenance of maps and records of critical pressure control infrastructure. In addition, the act includes the adoption of due process improvements related to PHMSA enforcement, establishes an idle pipe operating status, requires routine reporting to Congress regarding outstanding pipeline rulemaking, and an independent study regarding the cost-benefit of automated shut-off valves. We believe the revised legislation will not have a material impact on our business.

PHMSA is advancing additional rulemakings regarding rupture detection, the installation of remotely controlled valves on newly constructed or entirely replaced hazardous liquid pipelines, and revisions to the required repair criteria for integrity assessments. We believe that compliance with such regulatory changes will not have a material adverse effect on our results of operations.

In addition to regulations applicable to all of our pipelines, we have undertaken additional obligations to mitigate potential risks to health, safety and the environment on our Longhorn pipeline.  Our compliance with these incremental obligations is subject to the oversight of the U.S. Department of Transportation through PHMSA.

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States are largely preempted by federal law from regulating pipeline safety for interstate lines, but most states are certified by the U.S. Department of Transportation to assume responsibility for enforcing federal intrastate pipeline regulations and inspection of intrastate pipelines. States may adopt stricter standards for intrastate pipelines than those imposed by the federal government for interstate lines; however, states vary considerably in their authority and capacity to address pipeline safety. State standards may include requirements for facility design and management in addition to requirements for pipelines.

Our marine terminals along coastal waterways are subject to U.S. Coast Guard regulations and comparable state and municipal statutes relating to the design, installation, construction, testing, operation, replacement and management of these assets.

Safety. Our assets are subject to the requirements of the federal Occupational Safety and Health Act (“OSHA”) and comparable state statutes, which, among other things, require us to organize and disclose information about the hazardous materials used in our operations. Certain parts of this information must be reported to employees, contractors, state and local governmental authorities and local citizens upon request. We are subject to OSHA process safety management regulations and EPA risk management plan rules that are designed to identify and establish procedures to prevent or minimize the consequences of catastrophic releases of toxic, reactive, flammable or explosive chemicals. Compliance with these laws is not expected to have a material adverse effect on our business, financial position, results of operations or cash flows.

Security. Our assets can be subject to both physical and cyber security regulations depending on the nature of the facility. Some of our assets are regulated by the U.S. Department of Transportation, the EPA, the U.S. Coast Guard and the Department of Homeland Security (“DHS”). Compliance with these regulations is achieved by creating physical security plans, minimal physical security standards, marine terminal security drills and annual security audits of both marine and DHS-regulated facilities. Compliance with these laws is not expected to have a material adverse effect on our business, financial position, results of operations or cash flows.

Title to Properties

Substantially all of our pipelines are constructed on rights-of-way granted by the apparent record owners of the property, and in some instances, these rights-of-way have limited terms that may require periodic renegotiation or, if such negotiations are unsuccessful, may require us to seek to exercise the power of eminent domain where such remedy is available. Several rights-of-way for our pipelines and other real property assets are shared with other pipelines and by third parties. In many instances, lands over which rights-of-way have been obtained are subject to prior liens, which have not been subordinated to the rights-of-way grants. We have obtained permits from public authorities to cross over or under, or to lay facilities in or along, water courses, county roads, municipal streets and state highways, and in some instances, these permits are revocable at the election of the grantor. We have also obtained permits from railroad companies to cross over or under lands or rights-of-way, many of which are also revocable at the grantor’s election. In some cases, property for pipeline purposes was purchased in fee. In some states and under some circumstances, we have the right of eminent domain to acquire rights-of-way and land necessary for our pipelines. In some circumstances, a pipeline may be categorized as abandoned under certain governmental regulations, which may give rise to claims that the underlying easement or permit has been abandoned as well.

Some of the leases, easements, rights-of-way, permits and licenses that have been transferred to us are only transferable with the consent of the grantor of these rights, which in some instances is a governmental entity. We believe that we have obtained or will obtain sufficient third-party consents, permits and authorizations to operate our business in all material respects.

We believe that we have satisfactory title to all of our assets. Although title to our properties is subject to encumbrances in some cases, such as customary interests generally retained in connection with the acquisition of real property, liens that can be imposed in some jurisdictions for government-initiated action to clean up environmental contamination, liens for current taxes and other burdens, and easements, restrictions and other encumbrances to which the underlying properties were subject at the time of acquisition, we believe that none of

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these burdens should materially detract from the value of our properties or from our interest in them or should materially interfere with their use in the operation of our business.

Human Capital

As of December 31, 2020, we had 1,720 employees, primarily concentrated in the central and Gulf Coast regions of the U.S. There were 934 employees assigned to our refined products segment, 253 employees assigned to our crude oil segment and 533 employees assigned to provide G&A services.  Approximately 13% of our employees are represented by the United Steel Workers and covered by a collective bargaining agreement that expires in January 2022.

We provide a competitive benefits package designed to attract and retain a skilled and diverse workforce. Our benefits package includes access to life and health insurance, a defined benefit pension plan, a 401(k) plan and participation in our annual incentive program (“AIP”). Our performance-based AIP is intended to encourage all employees to make decisions that support our company’s financial, environmental, safety and cultural metrics. We also provide a long-term incentive plan for our management team and key employees that is aligned with the company’s long-term financial performance.

Investing in employee training and development is crucial to retaining top talent and developing our employees into subject matter experts and leaders who solve challenges, fuel innovation and move our business strategy forward. Employees receive training focused on safety, leadership, respect, regulatory compliance and company policies, including our code of business conduct. In addition, we offer comprehensive on-the-job training programs for facility operations and site specific requirements, to provide our employees the knowledge they need to safely operate our assets.

(d) [Reserved.]

(e) Available Information

Our internet address is www.magellanlp.com. We make available free of charge on or through our website our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as soon as reasonably practicable after we electronically file such material with, or furnish it to, the Securities and Exchange Commission.

Item 1A. Risk Factors

The nature of our business activities subjects us to a wide variety of hazards and risks. The following is a summary and a description of the most significant risks relating to our business activities that we have identified. In addition to the factors discussed elsewhere in this Annual Report on Form 10-K, you should carefully consider the risks and uncertainties described below, which could have a material adverse effect on our business, financial condition or results of operations, including our ability to generate cash and make distributions. You should also consider the interrelationship and potential compounding effects if multiple risks are realized. These risks are not the only risks that we face. Our business could be impacted by additional risks and uncertainties not currently known or that we currently believe to be immaterial.

Risk Factor Summary

The following is a summary of the most significant risks relating to our business activities that we have identified. If any of these risks actually occur, our business, financial condition or results of operation, including our ability to generate cash and make distributions could be materially adversely affected. For a more complete understanding of our material risk factors, this summary should be read in conjunction with the detailed description of our risk factors which follows this section.

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Changes in demand for and supply of petroleum products

•Unfavorable changes in the demand for the petroleum products that we transport, store and distribute could cause our revenue to decline or be more volatile;

•A decrease in crude oil production in the basins served by our crude oil pipelines could reduce our revenues;

•Decreased activities of producers, gathering systems, refineries and petroleum pipelines owned and operated by others on which we depend to supply our assets could impact demand for our services;

•A decrease in contract renewals or renewals at lower rates or shorter terms could cause our revenue to

decline or be more volatile.

Capital investment and financial risks

•The market value of our units may be affected by our ability to pay distributions or repurchase our units;

•We do not have the same flexibility as other types of organizations to accumulate cash and retained earnings, and we rely on access to capital to fund growth projects and to refinance existing debt obligations;

•Our business is subject to the risk of a capacity overbuild in the markets in which we operate;

•We are exposed to counterparty risk, and nonpayment or nonperformance by our customers, vendors, joint venture co-owners, lenders or derivative counterparties.

Commodity price volatility

•Reduced volatility in energy prices or new government regulations could discourage our storage customers from holding positions in petroleum products;

•The volume of crude oil we transport and the tariff rates we collect for transportation services partially depend upon unpredictable market differentials between our origin points and our destination points;

•Fluctuations in prices of petroleum products that we purchase and sell could materially adversely affect our results of operations.

Operational hazards

•Our business involves many hazards and operational risks, the occurrence of which could materially

adversely affect our financial results;

•Failure to monitor and maintain our physical assets could compromise integrity and result in increased risk of product releases and future maintenance costs;

•Failure of critical information technology systems may impact our ability to operate our assets or manage our businesses.

Cyber-attacks, terrorism and other external threats

•Cyber-attacks and terrorist attacks could result in increased costs or other damage to our business;

•The COVID-19 pandemic has adversely affected, and could continue to adversely affect, our business.

Regulatory risks

•Our operations are subject to extensive environmental, health, safety and other laws and regulations that

impose significant requirements and costs on us;

•Our customers are subject to extensive environmental, health, safety and other laws and regulations, and any new laws or regulations or changes in the interpretation of existing laws and regulations, including laws and regulations related to hydraulic fracturing, could result in decreased demand for our services;

•Rate regulation, challenges by shippers of the rates we charge on our refined products and crude oil pipelines or changes in the jurisdictional characterization of our assets or activities by federal, state or local regulatory agencies may reduce the amount of cash we generate;

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•Climate change legislation or regulations restricting emissions of “greenhouse gases” could result in increased operating costs and reduced demand for the products that we transport, store or distribute.

MLP structural risks

•Our status as a publicly traded partnership prevents our equity from being included in many prominent equity indices, which reduces the demand for our units from passive investment funds. In addition, some individual investors or investment funds may be unable or unwilling to invest in us for reasons related to our status as a partnership for federal income tax purposes;

•Our partnership agreement restricts the remedies available to holders of our common units for actions taken by our general partner that might otherwise constitute breaches of fiduciary duty.

Tax risks

•Our tax treatment depends on our status as a partnership for U.S. federal income tax purposes, as well as it not being subject to a material amount of entity-level taxation by individual states or local entities. The IRS could treat us as a corporation or we could otherwise become subject to a material amount of entity-level taxation for state or local tax purposes.

General risk factors

•Our business could be affected adversely by union disputes and strikes or work stoppages by our unionized employees.

Risks Related to Our Business

The following is a description of the most significant risks relating to our business activities that we have identified. You should carefully consider the risks and uncertainties described below, which could have a material adverse effect on our business, financial condition or results of operations, including our ability to generate cash and pay distributions.

Changes in demand for and supply of petroleum products

    Our financial results depend on the demand for the petroleum products that we transport, store and distribute. Unfavorable economic conditions, technological changes, regulatory developments or other factors in the U.S. or global marketplace could result in lower demand for these products for a sustained period of time.

Any sustained decrease in demand for petroleum products in the markets served by our pipelines or terminals could result in a significant reduction in the volume of products that we transport, store or distribute, and thereby reduce our cash flow and our ability to pay distributions. Global economic conditions have from time to time resulted in reduced demand for the products transported and stored by our pipelines and terminals and consequently for the services that we provide. Our financial results may also be affected by uncertain or changing economic conditions within certain regions or by supply or demand shifts between regions. If economic and market conditions remain uncertain or adverse conditions persist for an extended period, we could experience material adverse impacts to our business, financial condition or results of operations.

Other factors that could lead to a decrease in demand for the petroleum products we transport, store and distribute include:

•an increase in the use of alternative fuel sources, such as ethanol, biodiesel, renewable diesel, renewable gasoline, natural gas, fuel cells, solar power, wind power, electric and battery-powered engines and geothermal energy. Several governments and some automobile manufacturers have announced plans to significantly reduce or eliminate the use of traditional petroleum fuel powered vehicles, and significant increases in the production of electric vehicles are widely expected. In addition, current U.S. laws and

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regulations require an increase in the quantity of ethanol, biodiesel and other qualifying renewable fuels used in transportation fuels. Increases in the use of such alternative fuels could have a material adverse impact on the volume of petroleum-based fuels transported, stored or distributed on our pipelines or terminals;

•an increase in transportation fuel economy, whether as a result of a shift by consumers to more fuel-efficient vehicles, technological advances by manufacturers or federal, state or international regulations. Government regulations require increasing improvements in fuel economy standards. These standards are intended to reduce demand for petroleum products and could reduce demand for our services;

•changes in population or changes in consumer preferences, rates of automobile ownership or driving patterns in the markets we serve;

•an increase or decrease in the market prices of petroleum products, which may reduce supply or demand. Petroleum product prices have been volatile in recent years, and that volatility may continue in ways that we are unable to predict;

•higher fuel taxes or other governmental or regulatory actions that increase the cost of the products we handle; and

•lower exports of petroleum products to global markets resulting from weak economic conditions, regulatory changes, changing preferences for the type of petroleum products we export or preferences for alternative energy sources.

A decrease in crude oil production in the basins served by our crude oil pipelines could reduce our revenues, which could adversely impact our results of operations and the amount of cash we generate.

Numerous factors can cause reductions in crude oil production in the regions served by our pipelines, including, among other factors, lower overall crude oil prices, regional price or quality differences, higher costs of crude oil production, exhaustion of reserves, weather or other natural causes, epidemics, adverse regulatory or legal developments, disruptions in financial or credit markets that inhibit production, or lower overall demand for crude oil and the products derived from crude oil. Crude oil prices have historically exhibited significant volatility and are influenced by, among other factors, worldwide and domestic supplies of and demand for crude oil, political and economic developments in often-volatile producing regions, actions taken by OPEC and other non-OPEC countries with large production capacity, technological developments, government regulations, taxes, policies regarding the importing and exporting of crude oil and conditions in global financial markets.

We are unable to predict future prices of crude oil or what impact the crude price environment will have on future production overall or specifically on production in the basins we serve. Lower production in the regions served by our pipelines could result in lower shipments of uncommitted volume or could cause us to be unable to renew our contracts at existing volumes or rates. Any sustained decrease in the production of crude oil in the regions served by our crude oil pipelines could result in a significant reduction in the volume of products that we transport or the rates we are able to charge for such transportation services or both, thereby reducing our cash flow and our ability to pay distributions.

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    We depend on producers, gathering systems, refineries and petroleum pipelines owned and operated by others to supply our assets, and any closures, interruptions or reduced activity levels at these facilities may reduce the volumes we transport and store and the amount of cash we generate.

We depend on crude oil production and on connections with gathering systems, refineries and petroleum pipelines owned and operated by third parties to supply our assets. We cannot control or predict the amount of crude oil that will be delivered to us by the gathering systems and pipelines that supply our crude oil assets, nor can we control or predict the output of refineries that supply our refined products pipelines and terminals. Changes in the quality or quantity of this crude oil production, outages at these refineries or reduced or interrupted throughput on these gathering systems or pipelines due to weather-related or other natural causes, competitive forces, testing, line repair, damage, reduced operating pressures or other causes could reduce shipments on our pipelines or result in our being unable to receive products at or deliver products from our terminals or receive products for processing at our condensate splitter, any of which could materially adversely affect our cash flows and ability to pay distributions.

Refineries that supply or are supplied by our facilities are subject to regulatory developments, including but not limited to low carbon fuel standards, regulations regarding fuel specifications, plant emissions and safety and security requirements that could significantly increase the cost of their operations and reduce their operating margins. In addition, the profitability of the refineries that supply our facilities is subject to regional and global supply and demand dynamics that are difficult to predict. A period of sustained weak demand or increased costs could make refining uneconomic for some refineries, including those located directly or indirectly connected to our refined products and crude oil pipelines. The closure of a refinery that delivers product to or receives crude from our pipelines could reduce the volumes we transport and the amount of cash we generate. Further, the closure of these or other refineries could result in our customers electing to store and distribute petroleum products through their proprietary terminals, which could result in a reduction in demand for our storage services.

    A decrease in contract renewals or renewals at lower rates or shorter terms could cause our revenue to decline or be more volatile, which could adversely impact our results of operations and the amount of cash we generate and our ability to make distributions.

A significant portion of the revenue we earn from transportation, storage and processing services is received pursuant to multi-year contracts negotiated with our customers. Many of those contracts require our customers to pay for our services regardless of market conditions during the contract period. Changing market conditions, including changes in petroleum product supply or demand patterns, competitive factors, forward-price structure, financial market conditions, regulations, accounting rules or other factors could cause our customers to be unwilling to renew their contracts with us when those contracts terminate, or make them willing to renew only at lower rates or for shorter contract periods. Failure by our customers to renew any of their contracts with us on terms and at rates substantially similar to our existing contracts could result in lower utilization of our assets or cause our revenues to decline or be more volatile, any of which could adversely affect our results of operations, financial position and our ability to make distributions.

Capital investment and financial risks

    The market value of our units may be affected by our ability to pay distributions or repurchase our units.

Neither our distributions nor any unit repurchases are guaranteed to occur. The cash that we generate from operations could decrease or fail to meet expectations, either of which could reduce our ability to pay distributions and repurchase our common units.

The amount of cash we can distribute to our unitholders principally depends upon the cash we generate from our operations, as well as cash reserves established by our general partner. Our distributable cash flow does not depend solely on profitability, which is affected by non-cash items. As a result, we could pay distributions during periods when we record net losses and could be unable to pay distributions during periods when we record net income. In addition, the amount of cash we generate from operations is affected by numerous factors beyond our

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control, fluctuates from quarter to quarter and may change over time. Significant or sustained reductions in the cash generated by our operations would reduce our ability to pay distributions.

Additionally, our general partner’s board of directors authorized the repurchase of up to $750 million of our common units through 2022. Our unit repurchase program does not obligate us to acquire a specific number of units during any period, and our decision to commence, discontinue or resume repurchases in any period will depend on many factors, including some of the factors used to determine our ability to pay distributions. Any failure to pay distributions at expected levels or the discontinuation of our unit repurchase program could result in a loss of investor confidence and a decrease in the value of our unit price.

    We do not have the same flexibility as other types of organizations to accumulate cash and retained earnings to protect against illiquidity in the future, and we rely on access to capital to fund acquisitions and growth projects and to refinance existing debt obligations. Unfavorable developments in capital markets could limit our ability to obtain funding or require us to secure funding on terms that could limit our financial flexibility, reduce our liquidity, dilute the interests of our existing unitholders and reduce our cash flows and ability to pay distributions or repurchase our units.

Our partnership agreement requires us to make quarterly distributions to our unitholders of all available cash, after taking into account reserves established by the board of directors of our general partner for commitments and contingencies, including capital investments, operating costs and debt service requirements. In addition, our general partner’s board of directors authorized the repurchase of up to $750 million of our common units through 2022. We do not accumulate equity in the form of retained earnings in a manner typical of many other forms of organization, including most traditional public corporations, and so are more likely than those organizations to require issuances of additional capital to provide liquidity and capital resources.

We consider and pursue growth projects and acquisitions as part of our efforts to increase cash available for distribution to our unitholders. These transactions can be effected quickly, may occur at any time and may be significant in size relative to our existing assets and operations. We generally do not retain sufficient cash flow to finance such projects or acquisitions, and consequently we require access to external sources of capital to finance our growth capital spending. Similarly, we generally do not retain sufficient cash flow to repay our indebtedness when it matures, and we rely on new capital to refinance these obligations. Limitations on our access to capital, including on our ability to issue additional debt and equity, could result from events or causes beyond our control, and could include, among other factors, decreases in our creditworthiness or profitability, significant increases in interest rates, increases in the risk premium generally required by investors or in the premium required specifically for investments in energy-related companies or master limited partnership, and decreases in the availability of credit or the tightening of terms required by lenders. Any limitations on our access to capital on satisfactory terms could impair our ability to execute on our strategies, result in the dilution of the interests of our existing unitholders, and materially reduce our liquidity, our financial flexibility, our cash flows and our ability to pay distributions.

    Our business is subject to the risk of a capacity overbuild in the markets in which we operate.

We and our joint ventures have made significant investments in new energy infrastructure to meet market demand, as have several of our competitors. For example, we have invested significantly in pipelines to deliver crude oil from the Permian Basin in west Texas to markets along the U.S. Gulf Coast and from the DJ Basin in Colorado to Cushing, Oklahoma. The success of these and similar projects largely relies on the realization of anticipated market demand, and these projects typically require significant development periods, during which time demand for such infrastructure may change, or additional investments by competitors may be made. For example, the development of new pipeline capacity from the Permian Basin has resulted in takeaway capacity that significantly exceeds current production. This excess capacity has created a highly competitive environment that has decreased the crude oil price differential between the Permian Basin and end markets, including Houston, resulting in lowering the rates we are able to charge for our transportation services. When infrastructure investments in the markets we serve, including our own investments, result in capacity that exceeds the demand in those markets, our facilities could be underutilized, and we could be forced to reduce the rates we charge for our services, which

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could materially adversely affect our results of operations, financial position or cash flows, as well as our ability to pay distributions.

    We are exposed to counterparty risk. Nonpayment, commitment termination or nonperformance by our customers, vendors, joint venture co-owners, lenders or derivative counterparties could materially reduce our revenue, increase our expenses, impair our liquidity or otherwise negatively impact our results of operations, financial position or cash flows and our ability to pay distributions.

We are subject to risks of loss resulting from nonpayment or nonperformance by our customers to whom we extend credit. In addition, we frequently undertake capital expenditures based on commitments from customers from which we expect to realize the expected return on those expenditures, including take-or-pay commitments from our customers. Nonperformance by our customers of those commitments or termination of those commitments resulting from our inability to timely meet our obligations could result in substantial losses to us. Nonperformance by customers who back our capital projects could significantly impact our expected return from those projects.

We have undertaken numerous projects that require cooperation with and performance by joint venture co-owners. Nonperformance by our joint venture co-owners could result in increased costs or delays that could decrease our returns on our joint venture projects.

We utilize third-party vendors to provide various functions, including, for example, certain construction activities, engineering services, facility inspections and operation of certain software systems. Using third parties to provide these functions has the effect of reducing our direct control over the services rendered. The failure of one or more of our third-party providers to deliver the expected services on a timely basis at the prices we expect and as required by contract could result in significant disruptions, costs to our operation or instances of a contractor’s non-compliance with applicable laws and regulations, which could materially adversely affect our business, financial condition, operating results or cash flows.

We also rely to a significant degree on the banks that lend to us under our revolving credit facility for financial liquidity, and any failure of those banks to perform on their obligations to us could significantly impair our liquidity. Furthermore, nonpayment by the counterparties to our interest rate and commodity derivatives could expose us to additional interest rate or commodity price risk. Any take-or-pay commitment terminations or substantial increase in the nonpayment or nonperformance by our customers, vendors, lenders or derivative counterparties could have a material adverse effect on our results of operations, financial position or cash flows and our ability to pay distributions.

    Changes in price levels could negatively impact our revenue, our expenses, or both, which could materially adversely affect our results from operations, our liquidity and our ability to pay distributions.

The operation of our assets and the execution of expansion projects require significant expenditures for labor, materials, property, equipment and services. Increases in the cost of these items could materially increase our expenses or capital costs and we may not be able to pass these increased costs on to our customers in the form of higher fees for our services. Because we use the FERC’s PPI-based price indexing methodology to establish tariff rates in certain markets served by our pipelines, our revenues may be impacted by changes in price levels. In periods of general price deflation, the ceiling level provided for by the FERC’s index methodology could decrease requiring us to reduce our index-based rates, even if the actual costs we incur to operate our assets increase. Changes in price levels that lead to decreases in our revenue or increases in the prices we pay to operate and maintain our assets could materially adversely affect our results of operations, financial position or cash flows, as well as our ability to pay distributions.

    Our expansion projects may not immediately produce operating cash flows and may exceed our cost estimates or experience delays.

We may pursue large expansion projects that require us to make significant capital investments. We may finance those projects primarily with new borrowings, and we may incur financing costs during the planning and construction phases of these projects; however, the operating cash flows we expect these projects to generate may

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not materialize until sometime after the projects are completed, if at all. As a result, our indebtedness relative to our earnings could increase during the period prior to the generation of those operating cash flows. In addition, the amount of time and investment necessary to complete these projects could materially exceed the estimates we used when determining whether to undertake them.

Similarly, we typically must secure and retain required permits and rights-of-way in order to complete and operate these projects, and our inability to do so in a timely manner could result in significant delays or cost overruns. Our ability to secure required permits and rights-of-way or otherwise proceed with construction of our expansion projects could encounter opposition from political activists, who may attempt to delay energy infrastructure construction through protests, lawsuits and other means. Further, in many instances, the operations of our expansion projects are subject to the completion by third parties of connections or other related projects that are beyond our control. Delays or unanticipated costs associated with these third parties in the completion of these related projects could result in delays or cost overruns in the start-up of our own projects. In addition, we run the risk of failing to meet commitments to our customers as a result of project delays, which in some cases could allow our customers to terminate their commitments to us or otherwise negatively impact customer relationships and future financial results. Any cost overruns or unanticipated delays in the completion or commercial development of our expansion projects could reduce the anticipated returns on these projects, which in turn could materially increase our leverage and reduce our liquidity and our ability to pay distributions.

    The amount and timing of distributions to us from our joint ventures is not within our control, and we may be unable to cause our joint ventures to take or refrain from taking certain actions that may be in our best interest. In addition, as operator of most of our joint ventures, we are exposed to additional risk and liability in connection with our responsibilities in that capacity.

As of December 31, 2020, we were engaged in eight joint ventures, all of which are in the form of limited liability companies (“LLC”), in which we share control with other entities according to the relevant joint venture agreements. Those agreements provide that the respective LLC management committees, including our representatives along with the representatives of the other owners of those LLCs, determine the amount and timing of distributions. Our joint ventures may establish separate financing arrangements that contain restrictive covenants that may limit or restrict the LLC’s ability to make distributions to us under certain circumstances. Any inability to generate cash or restrictions on distributions we receive from our joint ventures could materially impair our results of operations, cash flows and our ability to pay distributions.

In the case of Double Eagle and Seabrook, an affiliate of our joint venture co-owner serves as operator, and consequently we rely on affiliates of our joint venture co-owner for many of the management functions of those joint ventures. Without the cooperation of the other owners of those joint ventures, we may not be able to cause our joint ventures to take or not take certain actions, even though those actions or inactions may be in the best interest of us or the particular joint venture. With respect to our other joint ventures, we are the operator, which exposes us to additional risk and liability in connection with our responsibilities in that capacity.

If we are unable to agree with our joint venture co-owners on a significant matter, it could result in delays, litigation or operational impasses that could result in a material adverse effect on that joint venture’s financial condition, results of operations or cash flows. If the matter is significant to us, it could result in a material adverse effect on our results of operations, financial position or cash flows. If we fail to make a required capital contribution, we could be deemed to be in default under the applicable joint venture agreement. Our joint venture co-owners may be permitted to pursue a variety of remedies, including funding any deficiency resulting from our failure to make such capital contribution, which would result in a dilution of our ownership interest, or, in some cases, our joint venture co-owners may have the option to purchase all of our existing interest in the subject joint venture.

Moreover, subject to certain limitations in the respective joint venture agreements, any joint venture owner may sell or transfer its ownership interest in a joint venture, whether in a transaction involving third parties or the other joint venture owners. Any such transaction could result in our being co-owners with different or additional parties with whom we have not had a previous relationship or who may not provide the same strengths and benefits as prior co-owners.

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Commodity price volatility

    Reduced volatility in energy prices or new government regulations could discourage our storage customers from holding positions in petroleum products, which could adversely affect the demand for our storage services.

The demand for our storage services has resulted in part from our customers’ desire to have the ability to take advantage of profit opportunities created by the volatility in prices of petroleum products. Periods of prolonged stability in petroleum product prices or extended declining trends of prices could reduce demand for our storage services. If federal, state or international regulations are passed that discourage our customers from storing these commodities, demand for our storage services could decrease, in which case we may be unable to identify customers willing to contract for such services or be forced to reduce the rates we charge for our services. The realization of any of these risks could materially reduce the amount of cash we generate.

    The volume of crude oil we transport and the tariff rates we collect for transportation services partially depend upon unpredictable market differentials between our origin points and our destination points.

Our tariff rates are established in accordance with federal and state regulations which, in general, permit us to negotiate rates with shippers so long as such negotiated rates are not unduly discriminatory among similarly situated shippers. Applicable regulations and our obligations to certain classes of committed shippers may limit our ability to change our tariff rates. When the difference in market prices for crude oil between our origin points and our destination points is lower than our tariff rates, the volume of product we transport could decline or the revenue we collect could decrease. For example, when the posted tariff rate for transportation on the Longhorn pipeline is higher than the market differential, as experienced in 2020, it is uneconomical for shippers to use Longhorn to move volumes from the Permian Basin to Houston. As a result, we experience lower revenues during such periods, which adversely impacts our results of operations and the amount of cash we generate.

    Fluctuations in prices of petroleum products that we purchase and sell could materially adversely affect our results of operations.

We generate product sales revenue from our gas liquids blending and fractionation activities, as well as from the sale of product generated by the operations of our pipelines and terminals. We also maintain product inventory related to these activities. Significant fluctuations in market prices of petroleum products could result in material unrealized gains or losses on transactions we enter to hedge our exposure to commodity price changes. To the extent these transactions have not been designated as hedges for accounting purposes, the associated unrealized gains and losses directly impact our reported results of operations. In addition, significant fluctuations in market prices of petroleum products could result in material losses or lower profits from these activities, thereby reducing the amount of cash we generate and our ability to pay distributions.

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    We hedge prices of petroleum products by utilizing physical purchase and sale agreements and exchange-traded futures contracts. These hedging arrangements do not eliminate all price risks, could result in fluctuations in quarterly or annual financial results and could result in material cash obligations that could negatively impact our financial position or our ability to pay distributions to our unitholders. Further, non-compliance with our risk management policies and procedures could result in material losses.

We hedge our exposure to price fluctuations for our petroleum products purchase and sale activities by utilizing physical purchase and sale agreements and exchange-traded futures contracts. To the extent these hedges do not qualify for hedge accounting treatment or are not designated as hedges, or if they result in material amounts of ineffectiveness, we could experience material fluctuations in our quarterly or annual reported results of operations. We may be required to post margin in connection with these hedges, which could result in material and unpredictable demands on our liquidity. These contracts may be for the purchase or sale of product in markets for a time frame different from those in which we are attempting to hedge our exposure, resulting in hedges that do not eliminate all price risks. In addition, our product sales and hedging operations involve the risk of non-compliance with our risk management policies. We cannot assure that our processes and procedures will detect and prevent all violations of our risk management policies, particularly if deception or other intentional misconduct is involved. If we incur a material loss related to commodity price risks, including as a result of non-compliance with our risk management policies and procedures, our results of operations or cash flows could be materially negatively impacted. Further, our requirement to post material amounts of margin in connection with our hedges could materially negatively impact our liquidity and our ability to pay distributions to our unitholders.

Operational hazards

    Our business involves many hazards and operational risks, the occurrence of which could materially adversely affect our results of operations, financial position or cash flows and our ability to pay distributions. Non-compliance with our policies and procedures could result in material losses.

Our operations are subject to many hazards inherent in the transportation and distribution of petroleum products, including releases and fires. In addition, our operations are exposed to potential natural disasters, including hurricanes, tornadoes, storms, floods and earthquakes. The risk of natural disasters and other operational risks could result in material losses due to personal injury or loss of life, severe damage to and destruction of property and equipment and pollution or other environmental damage, and may result in curtailment or suspension of our related operations. Some of our assets are located in or near high consequence areas such as residential and commercial centers or sensitive environments, and the potential damages are even greater in these areas. If a significant accident or event occurs or if any of our employees or agents violate or fail to observe the various policies and procedures we have adopted, including operational policies, safety policies and our code of business conduct, it could materially adversely affect our results of operations, financial position or cash flows and our ability to pay distributions.

    Failure to monitor and maintain our physical assets could compromise integrity and result in increased risk of product releases and future maintenance costs.

We utilize risk management systems and technologies to manage the physical asset risks associated with our pipeline systems and storage tanks. Our pipeline and storage assets are generally long-lived assets, some of which have been in service for decades. Failure of those management systems and technologies or failure to otherwise adequately monitor and maintain the condition of our assets could compromise integrity and result in increased maintenance or remediation expenditures and an increased risk of product releases and associated costs and liabilities. Any significant increase in these expenditures, costs or liabilities could materially adversely affect our results of operations, financial position or cash flows, as well as our ability to pay distributions.

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    Our insurance coverage may not be adequate to cover losses sustained, and we may experience increased costs and decreased availability of insurance options.

We are not fully insured against all hazards or operational risks related to our businesses, and the insurance we carry requires that we meet certain deductibles before we can collect for any covered losses we sustain. If a significant accident or event occurs that is not fully insured, it could materially adversely affect our results of operations, financial position or cash flows and our ability to pay distributions.

Premiums and deductibles for our insurance policies could escalate as a result of market conditions or losses experienced by us or by other companies. In some instances, insurance could become unavailable or available only for reduced amounts of coverage. Increases in the cost of insurance or the inability to obtain insurance at rates that we consider commercially reasonable could materially affect our results of operations, financial position or cash flows and our ability to pay distributions.

    Failure of critical information technology systems may materially impact our ability to operate our assets or manage our businesses.

We utilize information technology systems to operate our assets and manage our businesses. Some of these systems are proprietary systems that require specialized programming capabilities, while others are based upon or rely on technology that has been in service for many years. Failures of these systems could result in a failure of critical operational or financial controls and lead to a disruption of our operations, commercial activities or financial processes. Such failures could materially adversely affect our results of operations, financial position or cash flow, as well as our ability to pay distributions.

Cyber-attacks, terrorism and other external threats

    Cyber-attacks, or other information security breaches, that circumvent security measures taken by us or others with whom we conduct business or share information could result in materially increased costs or other damage to our business.

We rely on our information technology infrastructure to process, transmit and store electronic information, including information we use to operate our assets. In addition, we rely on third-party systems, including for example the electric grid and cloud-based software services, which could also be subject to security breaches or cyber-attacks, and the failure of which could have a material adverse effect on the operation of our assets. We and our third-party providers face cybersecurity and other security threats to our information technology infrastructure, which could include threats to our control systems and safety systems that operate our pipelines and other assets. We could face unlawful attempts to gain access to our information technology infrastructure, including coordinated attacks from hackers, including state-sponsored groups, “hacktivists” or private individuals. The age, operating systems or condition of our current information technology infrastructure and software assets and our ability to maintain and upgrade such assets could adversely affect our ability to resist cybersecurity threats. We could also face attempts to obtain unauthorized access by targeting acts of deception against individuals with legitimate access to physical locations or information.

Breaches in our information technology infrastructure or physical facilities, or other disruptions including those arising from theft, vandalism, fraud or unethical conduct, could result in damage to our assets, unnecessary waste, safety incidents, damage to people, property and the environment, reputational damage, potential liability or the loss of contracts, and could materially adversely affect our results of operations, financial position or cash flows, as well as our ability to pay distributions.

    Terrorist attacks aimed at our facilities or that impact our customers or the markets we serve could materially adversely affect our business.

The U.S. government has issued warnings that energy assets in general, and the nation’s pipeline and terminal infrastructure in particular, may be targets of terrorist organizations. The threat of terrorist attacks subjects our

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operations to increased risks. Any terrorist attack on our facilities, those of our customers or, in some cases, on energy infrastructure owned by others, could have a material adverse effect on our business. Similarly, any terrorist attack that severely disrupts the markets we serve could materially adversely affect our results of operations, financial position or cash flows, as well as our ability to pay distributions.

    The COVID-19 pandemic has adversely affected and could continue to materially and adversely affect our business.

The COVID-19 pandemic has negatively impacted the global economy. In response to the pandemic, governments around the world have implemented stringent measures to help reduce the spread of the virus, including stay-at-home orders, travel restrictions and other measures. Due to reductions in economic activity, the world is experiencing reduced demand for petroleum products and depressed petroleum products commodity prices, which has adversely affected our business. Continuing uncertainty regarding the global impact of COVID-19 is likely to result in continued weakness in demand for the services we provide. The reduction in refined products demand and lower crude oil prices have combined to put significant downward pressure on domestic crude oil production, and a sustained reduction in crude oil production could cause delays in the timing of our recognition of revenue from take-or-pay pipeline transportation commitments. These events have and will continue to materially and adversely affect our business.

Regulatory risks

    Our operations are subject to extensive environmental, health, safety and other laws and regulations that impose significant requirements, costs and liabilities on us. These requirements, costs and liabilities could increase as a result of new laws or regulations or changes in the interpretation, implementation or enforcement of existing laws and regulations. Our customers are also subject to extensive environmental, health, safety and other laws and regulations, and any new laws or regulations or changes in the interpretation, implementation or enforcement of existing laws and regulations, including laws and regulations related to hydraulic fracturing, could result in decreased demand for our services.

Our operations are subject to extensive federal, state and local laws and regulations relating to the protection or preservation of the environment, natural resources and human health and safety, including but not limited to the CAA, RCRA, OPA, CWA, CERCLA, HLPSA, ESA, MBTA, the Pipeline Safety, Regulatory Certainty and Job Creation Act of 2011 and OSHA. Such laws and regulations affect almost all aspects of our operations and generally require us to obtain and comply with various environmental registrations, licenses, permits, credits, inspections and other approvals. We incur substantial costs to comply with these laws and regulations, and any failure to comply may expose us to civil, criminal and administrative fees, fines and penalties, and interruptions in our operations that could have a material adverse impact on our results of operations, financial position and prospects. For example, if an accidental release or spill of petroleum products, chemicals or other hazardous substances occurs at or from our pipelines, storage or other facilities, we may experience significant operational disruptions, and we may have to pay a significant amount to remediate the release or spill, pay government penalties, address natural resource damages, compensate for human exposure and property damage, install costly pollution control equipment or undertake a combination of these and other measures. The resulting costs and liabilities could materially adversely affect our results of operations, financial position or cash flows. In addition, emission controls required under the CAA and other similar laws could require significant capital expenditures at our facilities.

Liability under such laws and regulations may be incurred without regard to fault, including latent conditions that we did not cause. Private parties, including the owners of properties through which our pipelines pass, also may have the right to pursue legal actions to enforce compliance as well as to seek damages for non-compliance with such laws and regulations or for personal injury or property damage. Our insurance does not cover all environmental risks and costs, including potential fines and penalties, and may not provide sufficient coverage in the event an environmental claim is made against us.

The laws and regulations that affect our operations, and the enforcement thereof, have become increasingly stringent over time. We cannot ensure that these laws and regulations will not be further revised or that new laws or regulations will not be adopted or become applicable to us. For instance, in October 2019, PHMSA modified its

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existing hazardous liquid pipeline regulations, requiring integrity assessments at least once every 10 years for pipeline segments located outside of high consequence areas (“HCAs”) and requires all pipelines in HCAs to be capable of accommodating in-line inspection tools within 20 years unless basic construction cannot accommodate in-line inspection tools effective July 1, 2020. In addition, changes in permitting processes, such as the Nationwide Permit Program under the CWA, could impact our ability to develop new projects or maintain our existing assets. Compliance with such legislative and regulatory changes could increase our compliance costs, make it more difficult to construct or maintain our assets and have a material adverse effect on our results of operations.

Our customers are also subject to extensive laws and regulations that affect their businesses, and new laws or regulations could materially adversely affect their businesses. For example, several of our most significant customers are refineries whose businesses could be significantly impacted by changes in environmental or health-related laws or regulations. In addition, we have made significant investments in crude oil and condensate storage and transportation projects that serve customers who largely depend on production techniques, such as hydraulic fracturing, that are currently being scrutinized by some governmental authorities and have encountered political opposition that could result in increased regulatory costs or delays. We are unable to predict the ultimate outcome of any such future legislative or regulatory activity. Any changes in laws or regulations, or in the interpretation, implementation or enforcement of existing laws and regulations, that impose significant costs or liabilities on our customers, or that result in delays or cancellations of their projects, could reduce demand for our services and materially adversely affect our results of operations, financial position or cash flows and our ability to pay cash distributions.

    Rate regulation, challenges by shippers of the rates we charge on our pipelines or changes in the jurisdictional characterization of our assets or activities by federal, state or local regulatory agencies may reduce the amount of cash we generate.

The FERC regulates the rates we can charge and the terms and conditions we can offer for interstate transportation service on our pipelines. State regulatory authorities regulate the rates we can charge and the terms and conditions we can offer for intrastate movements on our pipelines. The determination of the interstate or intrastate character of shipments on our petroleum products pipelines may change over time, which may change the rates we are allowed to charge for transportation and other related services. Shippers may protest our pipeline tariff filings, and the FERC or state regulatory authorities may investigate and require changes to tariff terms with or without such a protest or complaint. Further, other than for rates set under market-based rate authority, the FERC may order refunds of amounts collected under interstate rates that are determined to be in excess of a just and reasonable level. State regulatory authorities could take similar measures for intrastate tariffs. In addition, shippers may challenge by complaint the lawfulness of tariff rates that have become final and effective. If existing rates are determined to be in excess of a just and reasonable level, we could be required to pay refunds to shippers, reduce rates and make other concessions.

The FERC’s ratemaking methodologies may limit our ability to set rates based on our actual costs or may delay the use of rates that reflect increased costs. The FERC’s primary ratemaking methodology applicable to us is price indexing. We use this methodology to establish our rates in approximately 40% of the markets for our refined products pipelines. The FERC’s indexing methodology is subject to review every five years and currently allows a pipeline to change its rates each year to a new ceiling level, which is calculated as the previous year’s ceiling level multiplied by a percentage. For the five-year period beginning July 1, 2021, the indexing method provides for annual changes in rates by a percentage equal to the change in the PPI-FG plus 0.78%. When the ceiling level is negative, as it is anticipated to be in 2021, we are required to reduce our rates that are subject to the FERC’s price indexing methodology.

The FERC and relevant state regulatory authorities allow us to establish rates based on conditions in competitive markets without regard to the FERC’s index level or our cost-of-service. We establish market-based rates in approximately 60% of the markets for our refined products pipelines. The tariffs on most of our crude oil pipelines are at negotiated rates, but are still subject to regulation by the FERC or state agencies and subject to protest by shippers. If we were to lose our market-based rate authority, or if our negotiated rates were determined to not be just and reasonable, we could be required to establish rates on some other basis, such as our cost-of-service. We could also consider a cost-of-service filing if the indexing methodology did not provide a reasonable return on

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our assets due to cost increases in excess of the index or significantly declining transportation volumes. However, a cost-of-service filing could be limited in scope, unsuccessful, or even result in a tariff reduction, which could materially adversely reduce our revenues.

    Climate change legislation or regulations restricting emissions of “greenhouse gases” could result in increased operating costs and reduced demand for the products that we transport, store or distribute.

Federal and state legislative and regulatory initiatives in the U.S., as well as those in other countries, have attempted to and will continue to address climate change and control or limit greenhouse gas emissions. Although it is not possible to predict how they will impact our business, any such laws or regulations could adversely affect demand for the products that we transport, store and distribute. Depending on the particular programs adopted, they could also increase our costs to operate and maintain our facilities by requiring that we measure and report our emissions, install new emission controls on our facilities, acquire allowances to authorize our emissions, pay taxes related to our emissions and administer and manage an emissions program, among other things. We may be unable to include some or all of such increased costs in the rates charged to our customers and any such recovery may depend on events beyond our control, including the outcome of future rate proceedings before the FERC or state regulatory agencies and the provisions of any final legislation or implementing regulations.

Finally, certain scientific studies conclude that increasing concentrations of greenhouse gases in the Earth’s atmosphere effect climate changes and that such changes could result in the increased frequency and severity of storms, floods and other climatic events. If any such effects occur, there may be material adverse effects on our assets and operations.

    Our gas liquids blending activities subject us to federal regulations that govern renewable fuel requirements in the United States.

The Energy Independence and Security Act of 2007 expanded the required use of renewable fuels in the United States. Each year, the EPA establishes an RVO requirement for refiners and fuel manufacturers based on overall quotas established by the federal government. By virtue of our gas liquids blending activity and resulting gasoline production, we are an obligated party and receive an annual RVO from the EPA. We typically purchase renewable energy credits, called RINs, to meet this obligation. RINs are generated when a gallon of renewable fuels such as ethanol or biodiesel is produced. RINs may be separated when the renewable fuel is blended into gasoline or diesel, at which point the RIN is available for use in compliance or is available for sale on the open market. Increases in the cost or decreases in the availability of RINs could have a material adverse impact on our results of operations, cash flows and distributions.

    Our business is subject to federal, state, local and international laws and regulations that govern the quality specifications of the petroleum products that we store, transport or sell.

Petroleum products that we store and transport are sold by our customers for consumption into the public market. Various federal, state and local agencies, as well as international regulatory bodies, have the authority to prescribe specific product quality specifications for commodities sold into the public market. Changes in product quality specifications or blending requirements could reduce demand, reduce our throughput volume, require us to incur additional handling costs or require capital expenditures. For instance, different product specifications for different markets impact the fungibility of the products in our system and could require the construction of additional storage. If we are unable to recover these costs through increased revenue, our cash flows and ability to pay distributions could be materially adversely affected.

In addition, changes in the quality of the products we receive on our refined products pipeline, or changes in the product specifications in the markets we serve, could reduce or eliminate our ability to blend products, which would result in a reduction of our revenue and operating profit from blending activities. Any such reduction of our revenue or operating profit could have a material adverse effect on our results of operations, financial position, cash flows and ability to pay distributions.

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    We do not own all of the property on which our pipelines and facilities are located, and we rely on securing and retaining adequate rights-of-way and permits in order to operate our existing assets and complete growth projects.

We do not own all of the land on which our pipelines and facilities are located. As such, we are subject to the possibility of increased costs to retain necessary land use. In those instances, we obtain the rights to construct and operate our pipelines on land owned by third parties or governmental agencies and sometimes those rights are only for a specific period of time. In addition, some of our facilities cross Native American lands pursuant to rights-of-way of limited terms. We may not be able to utilize the right of eminent domain in some jurisdictions and in some circumstances, such as land owned by Native American tribes or other government entities. Our ability to secure required permits and rights-of-way or otherwise proceed with construction of our expansion projects could encounter opposition from activists who may attempt to delay construction through protests and other means. The loss of these rights, through our inability to acquire or renew right-of-way contracts or otherwise, could have a material adverse effect on our business, financial condition, results of operations, cash flows and our ability to make distributions to unitholders.

MLP structural risks

    Our status as a partnership prevents our equity from being included in many prominent equity indices, which reduces the demand for our units from passive investment funds. In addition, some individual investors or investment funds may be unable or unwilling to invest in us for reasons related to our status as a partnership for federal income tax purposes. Limitations on the demand for our units because we are a partnership could affect the trading liquidity and valuation of our units, and could make it more difficult for us to raise funds by issuing additional equity.

Because we are a partnership for federal income tax purposes, we are a pass-through entity and are not generally subject to entity-level taxation, and distributions to our unitholders are not taxed as dividends. Instead, our unitholders are treated as partners and allocated their proportionate share of our income, which is reported to them on schedule K-1 and which could subject them to other taxes, including state and local taxes imposed by the jurisdictions in which we conduct business. This taxation and reporting arrangement is different from and less common than the arrangement that prevails among most publicly traded companies, and may create complexities that could discourage some investors or investment funds from investing in us. In addition, the methodologies of most indices of publicly traded equities exclude publicly traded partnerships, and as a result many passive investment funds are prevented from investing in our equity. The inability or unwillingness of individual investors or investment funds to invest in us reduces demand for our units. This lower demand could result in lower trading liquidity in our equity, which could in turn cause greater volatility in our unit price, a lower unit price, or both. In addition, a reduction in demand for our units could make it less possible or less attractive for us to raise funds through issuances of additional equity, which could in turn reduce our financial flexibility or raise our cost of capital. Our status as a publicly traded partnership is required by our partnership agreement and can only be changed by a vote of our unitholders. A majority of our unitholders may prefer, and our management may estimate and advise our unitholders that it is in their best interest that we continue to enjoy the tax attributes of a publicly traded partnership despite these potential impacts of lower demand for our units on our trading liquidity or valuation.

    Our partnership agreement restricts the voting rights of unitholders owning 20% or more of our common units and has other governance differences from typical corporations.

Unitholders’ voting rights are restricted by a provision in our partnership agreement stating that any units held by a person that owns 20% or more of any class of our common units then outstanding, other than our general partner and its affiliates, cannot be voted on any matter. In addition, our partnership agreement contains provisions limiting the ability of unitholders to call meetings or to acquire information about our operations, as well as other provisions limiting our unitholders’ ability to influence our management. As a result of this provision, the trading price of our common units may be lower than other forms of equity ownership due to the absence of a takeover premium in the trading price or other governance differences.

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    Our unitholders’ liability may not be limited if a court finds that unitholder action constitutes control of our business.

A general partner of a partnership generally has unlimited liability for the obligations of the partnership, except for those contractual obligations of the partnership that are expressly made without recourse to the general partner. Our partnership is organized under Delaware law, and we conduct business in a number of other states. The limitations on the liability of holders of limited partner interests for the obligations of a limited partnership have not been clearly established in some of the other states in which we do business. Our unitholders could be liable for any and all of our obligations as if they were a general partner if a court or government agency were to determine that we were conducting business in a state but had not complied with that particular state’s partnership statute. Our unitholders’ rights to act with other unitholders to remove or replace the general partner, to approve some amendments to our partnership agreement or to take other actions under our partnership agreement may constitute “control” of our business which could result in our unitholders being liable for all of our obligations as if they were a general partner.

    Our partnership agreement replaces our general partner’s fiduciary duties to our common unitholders with contractual standards governing its duties and restricts the remedies available to our common unitholders for actions that might otherwise constitute breaches of fiduciary duty by our general partner.

Our partnership agreement contains provisions that eliminate the fiduciary standards to which our general partner and its officers and directors would otherwise be held by state fiduciary law and replaces those duties with several different contractual standards. For example, our partnership agreement permits our general partner to make a number of decisions in its sole discretion, free of any duties to us and our unitholders other than the implied contractual covenant of good faith and fair dealing. In addition, our partnership agreement contains provisions that restrict the remedies available to our unitholders for actions taken by our general partner that might otherwise constitute breaches of fiduciary duty under state fiduciary duty law. For example, our partnership agreement provides that whenever our general partner is permitted or required to make a decision, in its capacity as our general partner, it may make the decision in good faith and will not be subject to any other or different standard imposed by our partnership agreement, Delaware law or any other law, rule or regulation. In addition, our general partner and its officers and directors will not be liable for monetary damages to us or our unitholders resulting from any act or omission taken in good faith. In the absence of bad faith, our general partner will not be in breach of its obligations under our partnership agreement or its fiduciary duties to us or our unitholders if a transaction with an affiliate or the resolution of a conflict of interest is approved in accordance with our partnership agreement.

Tax risks

    Our tax treatment or the tax treatment of our unitholders could be subject to potential legislative, judicial or administrative changes and differing interpretations, possibly on a retroactive basis.

Current law may change so as to cause us to be treated as a corporation for federal income tax purposes or otherwise subject us to entity-level taxation. From time to time the U.S. government considers substantive changes to the existing federal income tax laws that affect publicly traded partnerships. We are unable to predict whether any such additional legislation or any other tax-related proposals will ultimately be enacted. Moreover, any modification to the federal income tax laws and interpretations thereof may or may not be applied retroactively. Any such changes could materially adversely impact a unitholder’s investment in our common units.

At the state level, changes in current state law may subject us to additional entity-level taxation by individual states. States frequently evaluate ways to subject partnerships to entity-level taxation through the imposition of state income, franchise and other forms of taxation. Imposition of any such taxes may materially reduce the cash available for distribution to our unitholders.

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    If the IRS contests the federal income tax positions we take, the market for our common units may be adversely impacted and the cost of any IRS contest will reduce our cash available for distribution to our unitholders.

The IRS has made no determination as to our status as a partnership for federal income tax purposes. The IRS may adopt positions that differ from the positions we take. It may be necessary to resort to administrative or court proceedings to sustain some or all of the positions we take. A court may not agree with some or all of the positions we take. Any contest with the IRS may materially and adversely impact the market for our common units and the price at which they trade. In addition, our costs of any contest with the IRS will be borne indirectly by our unitholders as the costs will reduce our cash available for distribution.

    The IRS may challenge aspects of our proration method, and, if successful, we would be required to change the allocation of items of income, gain, loss and deduction among our unitholders.

We prorate our items of income, gain, loss and deduction between transferors and transferees of our common units each month based upon the ownership of our common units on the first business day of each month, instead of on the basis of the date a particular unit is transferred. The U.S. Department of Treasury and the IRS issued Treasury Regulations that permit publicly traded partnerships to use a monthly simplifying convention that is similar to ours, but they do not specifically authorize all aspects of the proration method we have adopted. If the IRS were to successfully challenge this method, we could be required to change the allocation of items of income, gain, loss and deduction among our unitholders.

    We have adopted certain valuation methodologies in determining a unitholder’s allocations of income, gain, loss and deduction. The IRS may challenge these methodologies or the resulting allocations, and such a challenge could adversely affect the value of our common units.

In determining the items of income, gain, loss and deduction allocable to our unitholders, including when we issue additional units, we must determine the fair market value of our assets. Although we may from time to time consult with professional appraisers regarding valuation matters, we make many fair market value estimates using a methodology based on the market value of our common units as a means to measure the fair market value of our assets. The IRS may challenge these valuation methods and the resulting allocations of income, gain, loss and deduction.

A successful IRS challenge to these methods or allocations could adversely affect the amount, character and timing of taxable income or loss being allocated to our unitholders. It also could affect the amount of gain from our unitholders’ sale of our common units and could have a negative impact on the value of our common units or result in audit adjustments to our unitholders’ tax returns without the benefit of additional deductions.

    Our unitholders may be required to pay taxes on their share of our income even if they do not receive any distributions from us.

Our unitholders will be required to pay any federal income taxes and, in some cases, state and local income taxes on their share of our taxable income even if they receive no distributions from us. Our unitholders may not receive distributions from us equal to their share of our taxable income or even equal to the actual tax liability that results from that income.

    Tax gain or loss on disposition of our common units could be more or less than expected.

If our unitholders sell their common units, they will recognize a gain or loss equal to the difference between the amount realized and their tax basis in those common units. Prior distributions to our unitholders in excess of the total net taxable income they were allocated for a common unit, which decreased their tax basis in that common unit, will, in effect, become taxable income to our unitholders if the common unit is sold at a price greater than their tax basis in that common unit, even if the price they receive is less than their original cost. A substantial portion of the amount realized, whether or not representing gain, may be taxed as ordinary income due to potential recapture items, including depreciation recapture. In addition, because the amount realized includes a unitholder’s share of

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nonrecourse liabilities, if our unitholders sell their common units, they may incur a tax liability in excess of the amount of cash received from the sale.

    Tax-exempt entities and foreign persons face unique tax issues from owning our common units that may result in adverse tax consequences to them.

Investment in common units by tax-exempt entities, such as employee benefit plans, individual retirement accounts (known as IRAs) and foreign persons raises issues unique to them. For example, virtually all of our income allocated to organizations that are exempt from federal income tax, including IRAs and other retirement plans, will be unrelated business taxable income and will be taxable to them. Distributions to foreign persons will be reduced by withholding taxes at the highest applicable effective tax rate, and foreign persons will be required to file U.S. federal tax returns and pay tax on their share of our taxable income. Upon the sale, exchange or other disposition of a common unit by a foreign person, the transferee is generally required to withhold 10% of the amount realized on such sale, exchange or other disposition if any portion of the gain on such sale, exchange or other disposition would be treated as effectively connected with a U.S. trade or business. The U.S. Department of the Treasury and the IRS have recently issued final regulations providing guidance on the application of these rules for transfers of certain publicly traded partnership interests, including transfers of our common units. Under these regulations, the “amount realized” on a transfer of our common units will generally be the amount of gross proceeds paid to the broker effecting the applicable transfer on behalf of the transferor, and such broker will generally be responsible for the relevant withholding obligations. Distributions to foreign persons may also be subject to additional withholding under these rules to the extent a portion of a distribution is attributable to an amount in excess of our cumulative net income that has not previously been distributed. The U.S. Department of the Treasury and the IRS have provided that these rules will generally not apply to transfers of, or distributions on, our common units occurring before January 1, 2022.

    Our unitholders may be subject to state and local taxes and return filing requirements in states where they do not live as a result of investing in our common units.

In addition to federal income taxes, our unitholders may be subject to other taxes, including state and local taxes, unincorporated business taxes and estate, inheritance or intangible taxes that are imposed by the various jurisdictions in which we conduct business or own property now or in the future, even if they do not live in any of those jurisdictions. Our unitholders may be required to file tax returns and pay taxes in some or all of these various jurisdictions or be subject to penalties for failure to comply with those requirements. We currently own assets and conduct business in 22 states, most of which impose a personal income tax.

    If the IRS makes audit adjustments to our income tax returns for tax years beginning after December 31, 2017, it may assess and collect any taxes (including any applicable penalties and interest) resulting from such audit adjustment directly from us, in which case our cash available for distribution to our unitholders might be substantially reduced.

For tax years beginning after December 31, 2017, if the IRS makes audit adjustments to our income tax returns, it may assess and collect any taxes (including any applicable penalties and interest) resulting from such audit adjustment directly from us. Generally, we expect to elect to have our unitholders take such audit adjustment into account in accordance with their interests in us during the tax year under audit, but there can be no assurance that such election will be made, or applicable, in all circumstances. If we are unable to have our unitholders take such audit adjustment into account in accordance with their interests in us during the tax year under audit, our current unitholders may bear some or all of the economic burden resulting from such audit adjustment, even if such unitholders did not own units in us during the tax year under audit. If, as a result of any such audit adjustment, we are required to make payments of taxes, penalties and interest, our cash available for distribution to our unitholders might be substantially reduced.

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General risk factors

    Our business could be affected adversely by union disputes and strikes or work stoppages by our unionized employees.

As of December 31, 2020, approximately 13% of our workforce was covered by a collective bargaining agreement expiring January 2022. We could experience a work stoppage in the future as a result of disagreements with these labor unions. A prolonged work stoppage could have a material adverse effect on our business activities, results of operations and cash flows.

Item 1B.Unresolved Staff Comments

None.

Item 2.Properties

See Item 1(c) for a description of the locations and general character of our material properties.

Item 3.Legal Proceedings

Butane Blending Patent Infringement Proceeding.  On October 4, 2017, Sunoco Partners Marketing & Terminals L.P. (“Sunoco”) brought an action for patent infringement in the U.S. District Court for the District of Delaware alleging Magellan Midstream Partners, L.P. (“Magellan”) and Powder Springs Logistics, LLC (“Powder Springs”) are infringing patents related to butane blending at the Powder Springs facility located in Powder Springs, Georgia. Sunoco subsequently submitted pleadings alleging that Magellan is also infringing various patents related to butane blending at nine Magellan facilities, in addition to Powder Springs. Sunoco is seeking monetary damages, attorneys’ fees and a permanent injunction enjoining Magellan and Powder Springs from infringing the subject patents. We deny and are vigorously defending against all claims asserted by Sunoco. Although it is not possible to predict the outcome, we believe the ultimate resolution of this matter will not have a material adverse impact on our results of operations, financial position or cash flows.

Hurricane Harvey Enforcement Proceeding. In July 2018, we received a Notice of Enforcement letter from the Texas Commission on Environmental Quality alleging two air emission violations at our Galena Park, Texas terminal that occurred during Hurricane Harvey in third quarter 2017.  The penalties associated with these alleged violations could exceed $300,000. While the results cannot be predicted with certainty, we believe the ultimate resolution of this matter will not have a material impact on our results of operations, financial position or cash flows.

We and the non-controlled entities in which we own an interest are a party to various other claims, legal actions and complaints. While the results cannot be predicted with certainty, management believes the ultimate resolution of these claims, legal actions and complaints, after consideration of amounts accrued, insurance coverage or other indemnification arrangements, will not have a material adverse effect on our future results of operations, financial position or cash flows.  

Item 4.Mine Safety Disclosures

Not applicable.

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PART II

Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Our common units are listed and traded on the New York Stock Exchange under the ticker symbol “MMP.” At the close of business on February 17, 2021, we had 223,282,818 common units outstanding that were owned by approximately 150,000 record holders and beneficial owners (held in street name).

For information regarding common units that may be issued pursuant to our long-term incentive plan, see Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

We currently pay quarterly distributions of $1.0275 per common unit. In general, we intend to maintain our distribution at the current level; however, we cannot guarantee that future distributions will continue at current levels.

Issuer Purchases of Common Units

In first quarter 2020, we announced that our general partner’s board of directors authorized the repurchase of up to $750 million of our common units through 2022. We intend to purchase our common units from time-to-time through a variety of methods, including open market purchases and negotiated transactions, all in compliance with the rules of the Securities and Exchange Commission and other applicable legal requirements. The timing, price and actual number of common units repurchased will depend on a number of factors including our expected expansion capital spending, excess cash available, balance sheet metrics, legal and regulatory requirements, market conditions and the trading price of our common units. The repurchase program does not obligate us to acquire any particular amount of common units and may be suspended or discontinued at any time.

Unit repurchase activity during 2020 is detailed in the following table:

Period	Total Number of Common Units Purchased	Average Price Paid Per Unit		Total Number of Units Purchased as Part of Publicly Announced Program	Approximate Dollar Value of Units That May Yet Be Purchased under the Program (in millions)
January 1-31, 2020	—	$	—	—	$	750.0
February 1-29, 2020	1,514,719	$	59.19	1,514,719	$	660.4
March 1-31, 2020	2,117,065	$	53.06	2,117,065	$	548.1
First Quarter 2020	3,631,784	$	55.62	3,631,784
April 1-30, 2020	—			—	$	548.1
May 1-31, 2020	—			—	$	548.1
June 1-30, 2020	—			—	$	548.1
Second Quarter 2020	—			—
July 1-31, 2020	—			—	$	548.1
August 1-31, 2020	—			—	$	548.1
September 1-30, 2020	1,355,344	$	36.87	1,355,344	$	498.0
Third Quarter 2020	1,355,344	$	36.87	1,355,344
October 1-31, 2020	—			—	$	498.0
November 1-30, 2020	266,703	$	41.24	266,703	$	487.1
December 1-31, 2020	314,429	$	44.50	314,429	$	473.1
Fourth Quarter 2020	581,132	$	43.00	581,132
Year Ended 2020	5,568,260	$	49.74	5,568,260

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Unitholder Return Performance

The following graph compares the total unitholder return performance of our common units with the performance of (i) the Alerian MLP Infrastructure Index (“AMZI”), (ii) the Standard & Poor’s 500 Stock Index (“S&P 500”) and (iii) the Standard & Poor's 500 Energy Index ("S&P 500 Energy"). The graph assumes that $100 was invested in our common units and each comparison index beginning on December 31, 2015 and that all distributions or dividends were reinvested on a quarterly basis. The AMZI is a composite of energy infrastructure master limited partnerships, whose constituents earn the majority of their cash flow from midstream activities involving energy commodities and whose trading volume and market capitalization meet certain additional criteria.  The S&P 500 Energy is a subindex of the S&P 500 that includes those companies classified as members of the energy sector.

 

	12/31/2015	12/31/2016	12/31/2017	12/31/2018	12/31/2019	12/31/2020
MMP	$100	$117	$115	$98	$115	$85
AMZI	$100	$119	$108	$95	$102	$70
S&P 500	$100	$112	$136	$130	$171	$203
S&P 500 Energy	$100	$127	$126	$103	$115	$77

The information provided in this section is being furnished to and not filed with the SEC. As such, this information is neither subject to Regulation 14A or 14C nor to the liabilities of Section 18 of the Exchange Act.

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Item 6.Selected Financial Data

We have derived the summary selected historical financial data from our current and historical accounting records. Information concerning significant trends in our financial condition and results of operations is contained in Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Our operating results incorporate a number of significant estimates and uncertainties. Such matters could cause the data included herein not to be indicative of our future financial condition or results of operations. A discussion of our critical accounting estimates and how these estimates could impact our future financial condition or results of operations is included in Management’s Discussion and Analysis of Financial Condition and Results of Operations under Item 7 of this report. In addition, a discussion of the risk factors that could affect our business and future financial condition or results of operations is included under Item 1A. Risk Factors of this report. Further, the notes to our financial statements under Item 8. Financial Statements and Supplementary Data of this report include descriptions of areas where estimates and judgments could result in different amounts being recognized in our accompanying consolidated financial statements.

We believe that investors benefit from having access to the same financial measures utilized by management. In the following tables, we present the financial measure of distributable cash flow (“DCF”), which is not a generally accepted accounting principles (“GAAP”) measure. Our partnership agreement requires that all of our available cash, less amounts reserved by our general partner’s board of directors, be distributed to our unitholders. Management uses DCF to determine the amount of cash that our operations generated that is available for distribution to our unitholders and as a basis for recommending to our general partner’s board of directors the amount of distributions to be paid each period. We also use DCF as the basis for calculating our equity-based long-term incentive compensation. A reconciliation of DCF to net income, the nearest comparable GAAP measure, is included in the following tables.

In addition to DCF, the non-GAAP measures of operating margin (in the aggregate and by segment) and Adjusted EBITDA are presented in the following tables. A reconciliation of operating margin to operating profit and net income to Adjusted EBITDA, which are the nearest comparable GAAP financial measures, are included in the following tables. See Note 3 – Segment Disclosures under Item 8. Financial Statements and Supplementary Data of this report for a reconciliation of segment operating margin to segment operating profit. Operating margin is computed using amounts that are determined in accordance with GAAP and is an important measure of the economic performance of our core operations. Operating profit, alternatively, includes depreciation, amortization and impairment expense and general and administrative (“G&A”) expense that management does not focus on when evaluating the core profitability of our separate operating segments. Adjusted EBITDA is an important measure utilized by management and the investment community to assess the financial results of a company.

Since the non-GAAP measures presented here include adjustments specific to us, they may not be comparable to similarly-titled measures of other companies.

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	Year Ended December 31,
	2016		2017		2018		2019		2020
	(in thousands, except per unit amounts)
Income Statement Data:
Transportation and terminals revenue	$	1,591,119	$	1,731,775	$	1,878,988	$	1,970,630	$	1,794,854
Product sales revenue	599,602		758,206		927,220		736,092		611,719
Affiliate management fee revenue	14,689		17,680		20,365		21,190		21,229
Total revenue	2,205,410		2,507,661		2,826,573		2,727,912		2,427,802
Operating expenses	528,672		577,978		649,436		634,081		601,359
Cost of product sales	493,338		635,617		704,313		619,279		513,715
Subtotal	1,183,400		1,294,066		1,472,824		1,474,552		1,312,728
Other operating income (expense)	—		—		—		2,975		101
Earnings of non-controlled entities	78,696		120,994		181,117		168,961		153,327
Operating margin	1,262,096		1,415,060		1,653,941		1,646,488		1,466,156
Depreciation, amortization and impairment expense	178,142		196,630		265,077		246,134		258,676
G&A expense	147,165		165,717		194,283		196,650		173,478
Operating profit	936,789		1,052,713		1,194,581		1,203,704		1,034,002
Interest expense, net	165,410		193,718		200,514		198,554		221,826
Gain on disposition of assets	(28,144)		(18,505)		(353,797)		(28,966)		(12,887)
Other (income) expense	(6,466)		4,139		13,868		11,830		5,164
Income before provision for income taxes	805,989		873,361		1,333,996		1,022,286		819,899
Provision for income taxes	3,218		3,830		71		1,437		2,934
Net income	$	802,771	$	869,531	$	1,333,925	$	1,020,849	$	816,965
Basic net income per common unit	$	3.52	$	3.81	$	5.84	$	4.46	$	3.62
Diluted net income per common unit	$	3.52	$	3.81	$	5.84	$	4.46	$	3.62
Balance Sheets Data:
Working capital (deficit)	$	(111,262)	$	(239,899)	$	(30,213)	$	(207,468)	$	(153,381)
Total assets	$	6,772,073	$	7,394,375	$	7,747,537	$	8,437,729	$	8,196,982
Long-term debt, net	$	4,087,192	$	4,273,518	$	4,211,380	$	4,706,075	$	4,978,691
Partners’ capital	$	2,092,105	$	2,129,653	$	2,643,434	$	2,715,028	$	2,303,806
Distribution Data:
Distributions declared per unit(a)	$	3.32	$	3.59	$	3.87	$	4.07	$	4.11
Distributions paid per unit(a)	$	3.25	$	3.52	$	3.79	$	4.04	$	4.11

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	Year Ended December 31,
	2016		2017		2018		2019		2020
	(in thousands, except operating statistics)
Other Data:
Operating margin:
Refined products	$	840,181	$	934,984	$	1,074,705	$	1,025,497	$	965,813
Crude oil	416,960		474,802		573,289		615,485		493,734
Allocated partnership depreciation costs(b)	4,955		5,274		5,947		5,506		6,609
Operating margin	$	1,262,096	$	1,415,060	$	1,653,941	$	1,646,488	$	1,466,156
Adjusted EBITDA and distributable cash flow:
Net income	$	802,771	$	869,531	$	1,333,925	$	1,020,849	$	816,965
Interest expense, net	165,410		193,718		200,514		198,554		221,826
Depreciation, amortization and impairment(c)	189,332		210,000		272,522		240,874		254,586
Equity-based incentive compensation(d)	4,982		6,766		22,768		14,247		(2,715)
Gain on disposition of assets(e)	(28,144)		(18,505)		(351,215)		(16,280)		(10,511)
Commodity-related adjustments(f)	64,257		12,463		(101,987)		88,223		14,211
Distributions from operations of non-controlled entities in excess of (less than) earnings for the period	9,293		25,216		15,584		34,641		54,273
Other	5,341		3,749		3,644		—		—
Adjusted EBITDA	1,213,242		1,302,938		1,395,755		1,581,108		1,348,635
Interest expense, net, excluding debt issuance cost amortization(g)	(162,251)		(190,403)		(197,274)		(186,942)		(205,446)
Maintenance capital(h)	(103,507)		(91,163)		(88,736)		(96,702)		(98,718)
Distributable cash flow	$	947,484	$	1,021,372	$	1,109,745	$	1,297,464	$	1,044,471
Operating Statistics:
Refined products:
Transportation revenue per barrel shipped	$	1.473	$	1.495	$	1.556	$	1.616	$	1.675
Volume shipped (million barrels):
Gasoline	275.4		295.5		286.9		280.5		270.8
Distillates	150.2		166.2		181.7		184.6		175.5
Aviation fuel	25.7		26.5		31.0		41.1		21.6
Liquefied petroleum gases	10.4		9.9		11.0		9.7		0.9
Total volume shipped	461.7		498.1		510.6		515.9		468.8
Crude oil:
Magellan 100%-owned assets:
Transportation revenue per barrel shipped	$	1.321	$	1.348	$	1.208	$	0.939	$	1.028
Volume shipped (million barrels)(i)	187.0		196.4		242.8		317.2		229.9
Terminal average utilization (million barrels per month)	16.9		17.5		18.7		23.0		25.2
Select joint venture pipelines:
BridgeTex - volume shipped (million barrels)(j)	79.0		98.4		138.2		156.3		132.0
Saddlehorn - volume shipped (million barrels)(k)	5.2		19.0		27.4		56.1		61.6

(a)Distributions related to each quarter are declared and paid within 45 days following the close of that quarter. Distributions paid represent actual cash payments for distributions during each of the periods presented.

(b)Certain depreciation expense was allocated to our various business segments, which in turn recognized these allocated costs as operating expense, reducing segment operating margin by these amounts.

(c)Depreciation, amortization and impairment expense is excluded from DCF to the extent it represents a non-cash expense.

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(d)Because we intend to satisfy vesting of unit awards under our equity-based long-term incentive compensation plan with the issuance of common units, expenses related to this plan generally are deemed non-cash and excluded for DCF purposes. The amounts above have been reduced by cash payments associated with the plan, which are primarily related to tax withholdings.

(e)Gains on disposition of assets are excluded from DCF to the extent they are not related to our ongoing operations..

(f)See Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Distributable Cash Flow for a description of items included in our commodity-related adjustments.

(g)Interest expense includes $8.3 million of debt extinguishment costs in 2019 and $12.9 million in 2020 that are excluded from DCF as they are financing activities and not related to our ongoing operations.

(h)Maintenance capital expenditures maintain our existing assets and do not generate incremental DCF (i.e. incremental returns to our unitholders). For this reason, we deduct maintenance capital expenditures to determine DCF.

(i)Volume shipped includes shipments related to our crude oil marketing activities. Volume shipped in 2020 reflects a change in the way our customers contract for our services pursuant to which customers are able to utilize crude oil storage capacity at East Houston and dock access at Seabrook. Subsequent to this change, the services we provide no longer include a transportation element. Therefore, revenues related to these services are reflected entirely as terminalling revenues and the related volumes are no longer reflected in our calculation of transportation volumes.

(j)These volumes reflect the total shipments for the BridgeTex pipeline, which was owned 50% by us through September 28, 2018 and 30% thereafter.

(k)These volumes reflect the total shipments for the Saddlehorn pipeline which began operations in September 2016 and was owned 40% by us through January 31, 2020 and 30% thereafter.

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Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations

Introduction

We are a publicly traded limited partnership principally engaged in the transportation, storage and distribution of refined petroleum products and crude oil. As of December 31, 2020, our asset portfolio consisted of:

•our refined products segment, comprised of our approximately 9,800-mile refined petroleum products pipeline system with 54 connected terminals as well as 25 independent terminals not connected to our pipeline system and two marine storage terminals (one of which is owned through a joint venture); and

•our crude oil segment, comprised of approximately 2,200 miles of crude oil pipelines, a condensate splitter and 37 million barrels of aggregate storage capacity, of which approximately 27 million barrels are used for contract storage. Approximately 1,000 miles of these pipelines, the condensate splitter and 30 million barrels of this storage capacity (including 24 million barrels used for contract storage) are wholly-owned, with the remainder owned through joint ventures.

The following discussion and analysis should be read in conjunction with our consolidated financial statements and related notes included in this annual report on Form 10-K for the year ended December 31, 2020.

See Item 1. Business for a detailed description of our business.

Overview

Resilient Business Model. The year 2020 presented the most challenging industry and economic conditions experienced in our 20-year history as a public company. Despite the backdrop of a difficult year, we generated solid financial results while ensuring continuity of critical fuel supply for our nation. Companies like ours are extremely important to keep the United States’ economy moving and our employees worked diligently to ensure our business ran safely throughout the pandemic.

Our nation experienced unprecedented travel and economic restrictions related to COVID-19 and reduced drilling activity from the lower commodity price environment. As a result, our company was negatively impacted by significantly reduced demand for petroleum products, such as gasoline, diesel fuel and crude oil.

However, our resilient business model and financial strength positioned us well to respond not only to the near-term industry challenges but to successfully manage our company for the long term. Even during a pandemic, our company proved to be resilient, and we were able to pay consistent cash distributions to our investors, generate solid distribution coverage and maintain industry-leading leverage well within our long-standing limit.

Our conservative, disciplined approach provides us the confidence to manage our business through this business cycle. We remain optimistic that demand for our services will continue to increase as vaccines become more readily available, travel and economic activity recover and drilling returns due to an improved demand and commodity price environment.

Long-Term Value Creation. We remain focused on delivering long-term value for our investors through a disciplined combination of cash distributions, equity repurchases and capital investments. Construction projects have been a primary source of growth for our company over the years. Although the current environment for large-scale capital investments is challenging and likely to remain so for the foreseeable future, we continue to look for opportunities to invest in attractive, low-risk projects to benefit our future.

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Focus on Optimization. Efficiency and discipline are key to our business strategy, and we kicked off an optimization initiative over a year ago to identify opportunities throughout the organization. Our employees have been actively engaged in the process to identify better ways to run our business, with significant progress to date on this effort.

Optimization of our asset portfolio is an important element of our company’s discipline as well. During 2020, we divested three marine terminal facilities outside our strategic footprint to maximize value and our strong financial position.

Sustainability Commitment. Moving What Moves America® represents who we are and our commitment to safely and reliably deliver petroleum products that are essential and beneficial to everyday life.

Sustainability is not new to us. We have focused on long-term, sustainable operations and disciplined management since our creation two decades ago. However, we recognize the growing stakeholder interest in how these principles are incorporated into our daily operations, and we published our inaugural sustainability report last fall.

Our most important social obligation is to safely and reliably provide the fuels that our nation relies on each day, while protecting the communities where we live and work. In addition, we continue to be an industry leader in governance, with an independent board elected by our investors and all-employee annual compensation aligned with key environmental and safety metrics. We remain committed to providing transparency around how we manage and measure our environmental, social and governance performance.

Important Future Role. Looking ahead, investors are understandably curious how potential changes in energy policy could impact the long-term viability of our business. Based on industry and government forecasts, the demand for petroleum products is expected to remain strong for many years to come.

The vast majority of cars, trucks, tractors, locomotives and airplanes today depend on petroleum products to operate, especially in the markets served by our assets. Realistically, energy transition will take decades to accomplish, with petroleum products and Magellan continuing to play important roles in our nation’s energy future.

Recent Developments

COVID-19 and Decline in Commodity Prices.  The COVID-19 pandemic has negatively impacted the global economy. In response to the pandemic, governments around the world have implemented stringent measures to help reduce the spread of the virus, including stay-at-home orders, travel restrictions and other measures. Due to reductions in economic activity, the world is experiencing reduced demand for petroleum products and depressed commodity prices for petroleum products, which has adversely affected our business. Continuing uncertainty regarding the global impact of COVID-19 is likely to result in continued weakness in demand for the services we provide while the pandemic continues. The reduction in refined products demand and lower crude oil prices have combined to put significant downward pressure on domestic crude oil production, and a sustained reduction in crude oil production could cause delays in the timing of our recognition of revenue from take-or-pay pipeline transportation commitments. These events have and will continue to adversely affect our business. However, we do not believe these events will impact our ability to meet any of our financial obligations or result in any significant impairments to our assets.

Distribution. In January 2021, the board of directors of our general partner declared a quarterly distribution of $1.0275 per unit for the period of October 1, 2020 through December 31, 2020. This quarterly distribution was paid on February 12, 2021 to unitholders of record on February 5, 2021.

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Results of Operations

We believe that investors benefit from having access to the same financial measures utilized by management. Operating margin, which is presented in the following table, is an important measure used by management to evaluate the economic performance of our core operations. Operating margin is not a generally accepted accounting principles (“GAAP”) measure, but the components of operating margin are computed using amounts that are determined in accordance with GAAP. A reconciliation of operating margin to operating profit, which is its nearest comparable GAAP financial measure, is included in the following table. Operating profit includes expense items, such as depreciation, amortization and impairment expense and general and administrative (“G&A”) expense, which management does not focus on when evaluating the core profitability of our separate operating segments. Additionally, product margin, which management primarily uses to evaluate the profitability of our commodity-related activities, is provided in this table. Product margin is a non-GAAP measure but its components of product sales revenue and cost of product sales are determined in accordance with GAAP. Our gas liquids blending, fractionation and other commodity-related activities generate significant revenue. However, we believe the product margin from these activities, which takes into account the related cost of product sales, better represents its importance to our results of operations.

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Year Ended December 31, 2019 Compared to Year Ended December 31, 2020

Financial Highlights ($ in millions, except operating statistics)	Year Ended December 31,				Variance Favorable (Unfavorable)
	2019		2020		$ Change		% Change
Transportation and terminals revenue:
Refined products	$	1,355.6	$	1,241.8	$	(113.8)	(8)	%
Crude oil	620.4		559.6		(60.8)		(10)	%
Intersegment eliminations	(5.4)		(6.5)		(1.1)		(20)	%
Total transportation and terminals revenue	1,970.6		1,794.9		(175.7)		(9)	%
Affiliate management fee revenue	21.2		21.2		—		—	%
Operating expenses:
Refined products	471.7		425.4		46.3		10	%
Crude oil	173.3		189.1		(15.8)		(9)	%
Intersegment eliminations	(10.9)		(13.2)		2.3		21	%
Total operating expenses	634.1		601.3		32.8		5	%
Product margin:
Product sales revenue	736.1		611.7		(124.4)		(17)	%
Cost of product sales	619.3		513.7		105.6		17	%
Product margin	116.8		98.0		(18.8)		(16)	%
Other operating income (expense)	3.0		0.1		(2.9)		(97)	%
Earnings of non-controlled entities	169.0		153.3		(15.7)		(9)	%
Operating margin	1,646.5		1,466.2		(180.3)		(11)	%
Depreciation, amortization and impairment expense	246.1		258.7		(12.6)		(5)	%
G&A expense	196.7		173.5		23.2		12	%
Operating profit	1,203.7		1,034.0		(169.7)		(14)	%
Interest expense (net of interest income and interest capitalized)	198.6		221.8		(23.2)		(12)	%
Gain on disposition of assets	(29.0)		(12.9)		(16.1)		(56)	%
Other (income) expense	11.8		5.2		6.6		56	%
Income before provision for income taxes	1,022.3		819.9		(202.4)		(20)	%
Provision for income taxes	1.5		2.9		(1.4)		(93)	%
Net income	$	1,020.8	$	817.0	$	(203.8)	(20)	%
Operating Statistics
Refined products:
Transportation revenue per barrel shipped	$	1.616	$	1.675
Volume shipped (million barrels):
Gasoline	280.5		270.8
Distillates	184.6		175.5
Aviation fuel	41.1		21.6
Liquefied petroleum gases	9.7		0.9
Total volume shipped	515.9		468.8
Crude oil:
Magellan 100%-owned assets:
Transportation revenue per barrel shipped	$	0.939	$	1.028
Volume shipped (million barrels)(a)	317.2		229.9
Terminal average utilization (million barrels per month)	23.0		25.2
Select joint venture pipelines:
BridgeTex - volume shipped (million barrels)(b)	156.3		132.0
Saddlehorn - volume shipped (million barrels)(c)	56.1		61.6

(a) Volume shipped includes shipments related to our crude oil marketing activities. Volume shipped in 2020 reflects a change in the way our customers contract for our services pursuant to which customers are able to utilize crude oil storage capacity at East Houston and dock access at Seabrook. Subsequent to this change, the services we provide no longer include a transportation element. Therefore, revenues related to these services are reflected entirely as terminalling revenues and the related volumes are no longer reflected in our calculation of transportation volumes.

(b) These volumes reflect total shipments for the BridgeTex pipeline, which is owned 30% by us.

(c) These volumes reflect the total shipments for the Saddlehorn pipeline, which was owned 40% by us through January 31, 2020 and 30% thereafter.

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Transportation and terminals revenue decreased by $175.7 million, resulting from:

•a decrease in refined products revenue of $113.8 million. Transportation volumes decreased primarily due to lower demand during 2020 associated with the ongoing impact from COVID-19 and related restrictions as well as reduced drilling activity in response to the lower commodity price environment. Revenues also decreased due to the sale of three marine terminals in first quarter 2020 and discontinuation of the ammonia pipeline operations in late 2019. These declines were partially offset by contributions from the recently-constructed East Houston-to-Hearne pipeline segment that became operational in late 2019 and the West Texas pipeline expansion that began operations in the third quarter of 2020, as well as an increase in the average tariff rate in the current period as a result of the 2019 and 2020 mid-year adjustments; and

•a decrease in crude oil revenue of $60.8 million. Revenues from our Longhorn pipeline declined due to lower third-party spot shipments resulting from less favorable differentials between the Permian Basin and Houston and the 2020 expiration of several higher-priced contracts, partially offset by the activities of our marketing affiliate. Average tariff rates increased as a result of fewer shipments on our Houston distribution system, which move at a lower rate than longer-haul shipments. Lower transportation volume on our Houston distribution system resulted primarily from a change in the way customers now contract for services at our Seabrook export facility and was offset by incremental revenue from the related terminal transfer fee. Tender deduction revenues also decreased due to lower crude oil prices. These declines were partially offset by increased storage revenues as more contract storage was utilized at higher rates.

Operating expenses decreased $32.8 million, resulting from:

•a decrease in refined products expenses of $46.3 million primarily due to lower throughput activity, less integrity spending due to timing of work, reduced compensation expense and the absence of costs in the current period associated with the sold or discontinued assets, partially offset by less favorable product overages (which reduce operating expenses); and

•an increase in crude oil expenses of $15.8 million primarily due to higher integrity spending, less favorable product overages and additional fees we pay to Seabrook for contract storage and ancillary services that we utilize to provide services to our shippers, partially offset by lower power costs from reduced shipments and our recent optimization efforts.

Product margin decreased $18.8 million primarily due to reduced profitability and lower sales volumes from our gas liquids blending activities, partially offset by lower losses recognized in the current year on futures contracts. See Note 13 – Derivative Financial Instruments in Item 8. Financial Statements and Supplementary Data, as well as Other Items – Commodity Derivative Agreements below, for more information about our futures contracts.

Other operating income decreased $2.9 million in 2020 primarily due to insurance settlements received in 2019 mainly related to Hurricane Harvey, partially offset by lower losses recognized on a basis derivative agreement during the current period.

Earnings of non-controlled entities decreased $15.7 million primarily due to lower earnings from BridgeTex related to decreased uncommitted shipments based on unfavorable market conditions as well as lower earnings from Saddlehorn following the sale of a 10% interest in early 2020. These decreases were partially offset by additional earnings from MVP from the 2020 start-up of newly-constructed storage and dock assets.

Depreciation, amortization and impairment expense increased $12.6 million primarily due to the impairment of certain terminalling assets in 2020.

G&A expense decreased $23.2 million primarily due to lower incentive compensation accruals to reflect the impacts of COVID-19 related reductions in economic activity and the significant decline in commodity prices.

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Interest expense, net of interest income and interest capitalized, increased $23.2 million in 2020 primarily due to higher outstanding debt and higher costs associated with early debt retirement, as well as lower capitalized interest (due to lower ongoing construction project spending in 2020). Our average outstanding debt increased from $4.6 billion in 2019 to $4.9 billion in 2020. Our weighted-average interest rate decreased from 4.6% in 2019 to 4.4% in 2020.

Gain on disposition of assets was $16.1 million unfavorable. In 2020, we recognized a gain on the sale of a portion of our interest in Saddlehorn of $12.9 million. In 2019, we recognized a deferred gain of $11.0 million related to the 2018 sale of a portion of our investment in BridgeTex, a gain of $12.7 million related to our discontinued Delaware Basin crude oil pipeline construction project that was sold to a third party and a gain of $5.3 million resulting from the sale of an inactive terminal along our refined products pipeline system.

Other expense was $6.6 million favorable primarily due to lower pension costs.

For a comparative discussion of the years ended December 31, 2018 and 2019, see Part II, Item 7 – “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Results of Operations” in Exhibit 99.1 to our Form 8-K filed with the Securities and Exchange Commission on May 4, 2020, which reflects changes in our reporting segments since the filing of our Annual Report on Form 10-K for the year ended December 31, 2019.

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Distributable Cash Flow

Distributable cash flow (“DCF”) and Adjusted EBITDA are non-GAAP measures. See Item 6. Selected Financial Data for a discussion of how management uses these non-GAAP measures. A reconciliation of DCF and Adjusted EBITDA for the years ended December 31, 2019 and 2020 to net income, which is the nearest comparable GAAP financial measure, is as follows (in millions):

	Year Ended December 31,
	2019		2020
Net income	$	1,020.8	$	817.0
Interest expense, net	198.6		221.8
Depreciation, amortization and impairment(1)	240.9		254.6
Equity-based incentive compensation(2)	14.2		(2.7)
Gain on disposition of assets(3)	(16.3)		(10.5)
Commodity-related adjustments:
Derivative (gains) losses recognized in the period associated with future transactions(4)	29.7		29.3
Derivative gains (losses) recognized in previous periods associated with transactions completed in the period(4)	71.2		(20.9)
Inventory valuation adjustments(5)	(12.7)		5.8
Total commodity-related adjustments	88.2		14.2
Distributions from operations of non-controlled entities in excess of (less than) earnings	34.7		54.3
Adjusted EBITDA	1,581.1		1,348.7
Interest expense, net, excluding debt issuance cost amortization(6)	(186.9)		(205.5)
Maintenance capital(7)	(96.7)		(98.7)
DCF	$	1,297.5	$	1,044.5

(1)    Depreciation, amortization and impairment expense is excluded from DCF to the extent it represents a non-cash expense.

(2)    Because we intend to satisfy vesting of unit awards under our equity-based long-term incentive compensation plan with the issuance of common units, expenses related to this plan generally are deemed non-cash and excluded for DCF purposes. The amounts above have been reduced by cash payments associated with the plan, which are primarily related to tax withholdings.

(3)    Gains on disposition of assets are excluded from DCF to the extent they are not related to our ongoing operations.

(4)    Certain derivatives have not been designated as hedges for accounting purposes, and the mark-to-market changes of these derivatives are recognized currently in net income.  We exclude the net impact of these derivatives from our determination of DCF until the transactions are settled and, where applicable, the related products are sold.  In the period in which these transactions are settled and any related products are sold, the net impact of the derivatives is included in DCF.

(5)    We adjust DCF for lower of average cost or net realizable value adjustments related to inventory and firm purchase commitments as well as market valuations of short positions recognized each period as these are non-cash items. In subsequent periods when we physically sell or purchase the related products, we adjust DCF for the valuation adjustments previously recognized.

(6)    Interest expense includes $8.3 million of debt extinguishment costs in 2019 and $12.9 million in 2020 that are excluded from DCF as they are financing activities and are not related to our ongoing operations.

(7)    Maintenance capital expenditures maintain our existing assets and do not generate incremental DCF (i.e. incremental returns to our unitholders). For this reason, we deduct maintenance capital expenditures to determine DCF.

Liquidity and Capital Resources

Cash Flows and Capital Expenditures

Operating Activities. Net cash provided by operating activities was $1,321.2 million and $1,107.4 million for the years ended December 31, 2019 and 2020, respectively. The $213.8 million decrease from 2019 to 2020 was due to lower net income as previously described and changes in our working capital, partially offset by adjustments for non-cash items and distributions in excess of earnings of our non-controlled entities.

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Investing Activities. Net cash used by investing activities for the years ended December 31, 2019 and 2020 was $1,007.3 million and $199.2 million, respectively. During 2020, we used $439.6 million for capital expenditures, which included $0.2 million for undivided joint interest projects for which cash was received from a third party. Also, during 2020, we sold three marine terminals for cash proceeds of $251.8 million and sold a portion of our interest in Saddlehorn for cash proceeds of $79.9 million. Additionally, we made net capital contributions of $94.6 million to our joint ventures, which we account for as investments in non-controlled entities. During 2019, we used $944.0 million for capital expenditures, which included $92.1 million for undivided joint interest projects for which cash was received from a third party. Additionally, we made net capital contributions of $203.9 million to our joint ventures, of which $198.9 million related to capital projects.

Financing Activities. Net cash used by financing activities for the years ended December 31, 2019 and 2020 was $538.6 million and $970.3 million, respectively. During 2020, we paid distributions of $927.1 million to our unitholders and made common unit repurchases of $276.9 million. Additionally, we received net proceeds of $828.4 million from the issuance of long-term senior notes, which were used to repay our $550.0 million of 4.25% notes due 2021 and outstanding commercial paper borrowings at that time. Also, in January 2020, our equity-based incentive compensation awards that vested December 31, 2019 were settled by issuing 284,643 common units and distributing those units to the long-term incentive plan (“LTIP”) participants, resulting in payments primarily associated with tax withholdings of $14.7 million. During 2019, we paid distributions of $921.6 million to our unitholders. Additionally, we received net proceeds of $996.4 million from borrowings under long-term notes, which were used to repay our $550.0 million of 6.55% notes due 2019 and outstanding commercial paper borrowings at that time. Also, in January 2019, our equity-based long-term incentive compensation awards that vested December 31, 2018 were settled by issuing 208,268 common units and distributing those units to the LTIP participants, resulting in payments primarily associated with tax withholdings of $9.8 million.

The quarterly distribution amount related to fourth quarter 2020 earnings was $1.0275 per unit, which was paid in February 2021. If we were to continue paying distributions at this level on the number of common units currently outstanding, total distributions of approximately $918 million would be paid to our unitholders related to 2021 earnings. Management believes we will have sufficient DCF to fund these distributions.

For a discussion of cash flows for the year ended December 31, 2018, see Part I, Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and Capital Resources” in Exhibit 99.1 to our Form 8-K filed with the Securities and Exchange Commission on May 4, 2020, which reflects changes in our reporting segments since the filing of our Annual Report on Form 10-K for the year ended December 31, 2019.

Capital Requirements

Capital spending for our business consists primarily of:

•Maintenance capital expenditures. These expenditures include costs required to maintain equipment reliability and safety and to address environmental and other regulatory requirements rather than to generate incremental DCF; and

•Expansion capital expenditures. These expenditures are undertaken primarily to generate incremental DCF and include costs to acquire or construct additional assets to grow our business and to expand or upgrade our existing facilities and to construct new assets, which we refer to collectively as organic growth projects. Organic growth projects include, for example, capital expenditures that increase storage or throughput volumes or develop pipeline connections to new supply sources.

During 2020, our maintenance capital spending was $98.7 million. For 2021, we expect to spend approximately $85 million on maintenance capital projects.

During 2020, we spent $259.8 million for our expansion capital projects and contributed $94.6 million for expansion capital projects in conjunction with our joint ventures. Based on the progress of projects already

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underway, we expect to spend approximately $75 million in 2021 to complete our current slate of expansion capital projects.

Liquidity

Cash generated from operations is a key source of liquidity for funding debt service, maintenance capital expenditures, quarterly distributions and unit repurchases. Additional liquidity for purposes other than quarterly distributions, such as expansion capital expenditures and debt repayments, is available through borrowings under our commercial paper program and revolving credit facility, as well as from other borrowings or issuances of debt or common units (see Note 9 – Debt and Note 18 – Partners’ Capital and Distributions in Item 8. Financial Statements and Supplementary Data of this report for detail of our borrowings and changes in partners’ capital).

Off-Balance Sheet Arrangements

None.

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Contractual Obligations

The following table summarizes our contractual obligations as of December 31, 2020 (in millions):

	Total		< 1 year		1-3 years		4-5 years		> 5 years
Long-term debt obligations(1)	$	5,000.0	$	—	$	—	$	250.0	$	4,750.0
Interest obligations(1)	4,459.2		221.4		442.8		434.5		3,360.5
Operating lease obligations	186.7		33.2		61.3		49.5		42.7
Storage contract commitments(2)	11.9		8.4		2.5		0.6		0.4
Pipeline capacity commitments(3)	49.8		9.6		19.3		19.3		1.6
Right-of-way obligations(4)	11.4		1.8		3.4		2.2		4.0
Pension and postretirement medical obligations(5)	165.2		29.5		87.3		37.0		11.4
Purchase commitments:
Product purchase commitments(6)	79.9		69.8		10.1		—		—
Utility purchase commitments	15.9		8.2		4.5		3.1		0.1
Derivative instruments(7)	—		—		—		—		—
Equity-based incentive awards(8)	33.1		15.2		17.9		—		—
Capital project purchase obligations	29.2		29.1		0.1		—		—
Maintenance obligations	79.4		79.0		0.4		—		—
Other	11.8		7.7		3.9		0.2		—
Total	$	10,133.5	$	512.9	$	653.5	$	796.4	$	8,170.7

(1)At December 31, 2020, we had no borrowings outstanding under our revolving credit facility or commercial paper program. For purposes of this table, we have reflected no assumed borrowings under our revolving credit facility or commercial paper program for any periods presented. We have included interest obligations based on the stated amounts of our fixed-rate obligations.

(2)Includes product storage we have contracted from third parties. The cost of storage services is recognized in cost of product sales on our consolidated statements of income.

(3)Includes pipeline capacity we have contracted from third parties. The cost of these commitments is recognized in operating expense on our consolidated statements of income.

(4)Represents right-of-way agreements with a contractual maturity date over one year. The cost of these obligations is recognized in operating expense on our consolidated statements of income.

(5)Represents the projected benefit obligation of our pension and postretirement medical plans less the fair value of plan assets.

(6)Includes product purchase commitments for which the price provisions are indexed based on the date of delivery. We have estimated the value of these commitments using the related index price curve as of December 31, 2020. Also, we have excluded certain product purchase agreements for which there is no specified or minimum quantity.

(7)As of December 31, 2020, we had entered into exchange-traded futures contracts representing 3.4 million barrels of petroleum products that we expect to sell in the future and 0.1 million barrels of gas liquids we expect to purchase in the future. At December 31, 2020, we had recorded a net liability of $21.3 million and made margin deposits of $34.2 million. We have excluded from this table the future net cash outflows, if any, under these futures contracts and the amounts of future margin deposit requirements because those amounts are uncertain.

(8)Settlements of our LTIP awards will differ from these reported amounts primarily due to differences between actual and current estimates of payout percentages and completion of the remaining portion of the requisite service periods.

Other Items

Executive Officer Retirements. Jeff R. Selvidge, Senior Vice President of Commercial – Refined Products, retired in November 2020 after 30 years of service with us and our predecessors.

Pipeline Tariff Changes. The Federal Energy Regulatory Commission (“FERC”) regulates the rates charged on interstate common carrier pipelines. Based on preliminary estimates, we expect to decrease rates in the 40% of our markets that are subject to the FERC’s index methodology by approximately 0.5% on July 1, 2021. While we continue to evaluate the remaining 60% of our markets, we generally intend to increase rates in those markets by 3% to 4% on July 1, 2021, similar to the 2020 rate increase for our competitive markets. Most of the tariffs on our long-

51

haul crude oil pipelines are established at negotiated rates that generally provide for annual adjustments in line with changes in the FERC index, subject to certain modifications. We expect to change the rates of our long-haul crude oil pipelines between 0% and 2% in July 2021.

Commodity Derivative Agreements. Certain of our business activities result in our owning various commodities, which exposes us to commodity price risk. We use forward physical commodity contracts and exchange-traded futures contracts to hedge against changes in prices of commodities that we expect to sell or purchase in future periods. We are a party to a basis derivative agreement for which settlements are determined based on the basis differential of crude oil prices at different market locations.

For further information regarding the quantities of refined products and crude oil hedged at December 31, 2020 and the fair value of open hedge and basis derivative contracts at that date, please see Item 7A. Quantitative and Qualitative Disclosures about Market Risk.

Related Party Transactions. See Note 17 – Related Party Transactions in Item 8. Financial Statements and Supplementary Data of this report for detail of our related party transactions.

Critical Accounting Estimates

Our management has discussed the development and selection of the following critical accounting estimates with the audit committee of our general partner’s board of directors, which has reviewed and approved these disclosures.

Pension Obligations

We sponsor a pension plan covering union employees and a pension plan for non-union employees. Various estimates and assumptions directly affect net periodic benefit expense and obligations for these plans. These estimates and assumptions include the expected long-term rates of return on plan assets, discount rates and the expected rate of compensation increase. Management reviews these assumptions annually and makes adjustments as necessary.

The following table presents the estimated increase (decrease) in net periodic benefit expense and obligations that would result from a 1% change in the specified assumption (in thousands):

	Benefit Expense				Benefit Obligation
	1% Increase		1% Decrease		1% Increase		1% Decrease
Pension benefits:
Discount rate	$	(5,562)	$	6,801	$	(53,958)	$	67,603
Expected long-term rate of return on plan assets	$	(2,963)	$	2,963	$	—	$	—
Rate of compensation increase	$	5,210	$	(5,231)	$	31,234	$	(31,301)

The following table sets forth the increase (decrease) in our pension funding based on our current funding policy assuming a 1% change in the specified criterion (in thousands):

	1% Increase		1% Decrease
Rate of compensation increase	$	517	$	(506)

The discount rate directly affects the measurement of the benefit obligations of our pension benefit plans. The objective of the discount rate is to determine the amount, if invested at the December 31 measurement date in a portfolio of high-quality fixed income securities, that would provide the necessary cash flows to make benefit payments when due. Decreases in the discount rate increase the obligation and generally increase the related expense, while increases in the discount rate have the opposite effect. Changes in general economic and market

52

conditions that affect interest rates on long-term high-quality fixed income securities as well as the duration of our plans’ liabilities affect our estimate of the discount rate.

We estimate the long-term expected rate of return on plan assets using expectations of capital market results, which includes an analysis of historical results as well as forward-looking projections. We base these capital market expectations on a long-term period and on our investment strategy and asset allocation. We develop our estimates using input from several external sources, including consultation with our third-party independent investment consultant. We develop the forward-looking capital market projections using a consensus of expectations by economists for inflation and dividend yield, along with expected changes in risk premiums. Because our determined rate is an estimate of future results, it could be significantly different from actual results. The expected rates of return on plan assets are long-term in nature; therefore, short-term market performance does not significantly affect our estimated long-term expected rate of return.

The expected rate of compensation increase represents average long-term salary increases. An increase in this rate causes the pension obligation and expense to increase.

Impairment of Long-Lived Assets, Goodwill and Investments

Impairment of Long-Lived Assets. Long-lived assets, including fixed assets and intangibles, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. Such indicators include, among others, the nature of the asset, the projected future economic benefit of the asset, changes in regulatory and political environments and historical and future cash flow and profitability measurements. If the carrying value of an asset exceeds the future undiscounted cash flows expected from the asset, we recognize an impairment charge for the excess of carrying value of the asset over its estimated fair value.

Goodwill. The goodwill relating to each of our reporting units is tested for impairment annually as well as when an event or change in circumstances indicates an impairment may have occurred. Under GAAP, we have the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of one of our reporting units is greater than its carrying amount. If, after assessing the totality of events or circumstances, we determine it is more likely than not that the fair value of a reporting unit is greater than its carrying amount, we are not required to perform any further testing. However, if we conclude otherwise, we perform the first step of a two-step impairment test by calculating the fair value of the reporting unit and comparing the fair value with the carrying amount of the reporting unit. If the fair value of the reporting unit is less than its carrying value, an impairment loss is recorded to the extent that the implied fair value of the goodwill of the reporting unit is less than its carrying value. We have the option to bypass the qualitative assessment for any reporting unit in any period and proceed directly to performing the first step of the two-step goodwill impairment test.

For purposes of performing the impairment test for goodwill, our reporting units are our reportable segments. In 2018, we elected to complete the quantitative goodwill impairment test and began with step one of the test as required by GAAP. Based on this assessment, we calculated that the fair value of each of our reporting units was greater than its carrying amount. In 2019 and 2020, we elected to perform the qualitative assessment described above for purposes of our annual goodwill impairment test. Based on these assessments, we concluded that it was more likely than not that the fair value of each of our reporting units was greater than its carrying amount. Accordingly, no further testing was required.

Determination as to whether and how much goodwill or long-lived assets are impaired involves management estimates on highly uncertain matters such as future commodity prices, the effects of inflation and technology improvements on operating expenses and the outlook for national or regional market supply and demand conditions. We base the impairment reviews and calculations used in our impairment tests on assumptions that are consistent with our business plans and long-term investment decisions. See Note 5 – Property, Plant and Equipment, Goodwill and Other Intangibles in Item 8. Financial Statements and Supplementary Data for additional information regarding impairments of goodwill and long-lived assets.

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Investments. We evaluate investments in non-controlled entities for impairment whenever events or circumstances indicate that there is an other-than-temporary loss in value of the investment. When evidence of loss in value has occurred, we compare our estimate of fair value of the investment to the carrying value of the investment to determine whether an impairment has occurred. If the estimated fair value is less than the carrying value and we consider the decline in value to be other-than-temporary, the excess of the carrying value over the fair value is recognized in our consolidated financial statements as an impairment charge.

 New Accounting Pronouncements

See Note 2 – Summary of Significant Accounting Policies in Item 8. Financial Statements and Supplementary Data of this report for a summary of new accounting pronouncements.

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Item 7A.Quantitative and Qualitative Disclosures About Market Risk

We may be exposed to market risk through changes in commodity prices and interest rates and have established policies to monitor and control these market risks. We use derivative agreements to help manage our exposure to commodity price and interest rate risks. 

Commodity Price Risk

Our commodity price risk primarily arises from our gas liquids blending and fractionation activities, and from managing product overages and shortages associated with our refined products and crude oil pipelines and terminals. We use derivatives such as forward physical contracts and exchange-traded futures contracts to help us manage commodity price risk.

Forward physical contracts that qualify for and are elected as normal purchases and sales are accounted for using traditional accrual accounting. As of December 31, 2020, we had commitments under forward purchase and sale contracts as follows (in millions):

	Total		< 1 Year		1 – 3 Years
Forward purchase contracts – notional value	$	79.9	$	69.8	$	10.1
Forward purchase contracts – barrels	1.8		1.6		0.2
Forward sales contracts – notional value	$	23.5	$	23.5	$	—
Forward sales contracts – barrels	0.5		0.5		—

We generally use exchange-traded futures contracts to hedge against changes in the price of petroleum products we expect to sell or purchase. We did not elect hedge accounting treatment under Accounting Standards Codification 815, Derivatives and Hedging for our open contracts and as a result we accounted for these contracts as economic hedges, with changes in fair value recognized currently in earnings. The fair value of these open futures contracts, representing 3.4 million barrels of petroleum products we expect to sell and 0.1 million barrels of gas liquids we expect to purchase, was a net liability of $21.3 million. With respect to these contracts, a $10.00 per barrel increase (decrease) in the prices of petroleum products we expect to sell would result in a $34.0 million decrease (increase) in our operating profit, while a $10.00 per barrel increase (decrease) in the price of gas liquids we expect to purchase would result in a $1.0 million increase (decrease) in our operating profit. These increases or decreases in operating profit would be substantially offset by higher or lower product sales revenue or cost of product sales when the physical sale or purchase of those products occurs, respectively. These contracts may be for the purchase or sale of products in markets different from those in which we are attempting to hedge our exposure, and the related hedges may not eliminate all price risks.

We are a party to a basis derivative agreement with a joint venture co-owner’s affiliate, and that affiliate is a party to an intrastate transportation services agreement with the joint venture, which was entered into contemporaneously with the basis derivative agreement. Settlements under the basis derivative agreement are determined based on the basis differential of crude oil prices at different market locations and a notional volume of 30,000 barrels per day. As a result, we are exposed to the differential in the forward price curves for crude oil in West Texas and the Houston Gulf Coast. With respect to this agreement, a $0.50 per barrel increase (decrease) in the differential would result in an approximately $1 million increase (decrease) in our operating profit.

Interest Rate Risk

Our use of variable rate debt and any future issuances of fixed rate debt expose us to interest rate risk. As of December 31, 2020, we did not have any variable rate debt outstanding.

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Item 8.    Financial Statements and Supplementary Data

Management’s Annual Report on Internal Control Over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rule 13a-15(f) of the Securities Exchange Act of 1934, as amended. Our internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Management assessed the effectiveness of its internal control over financial reporting as of December 31, 2020. In making this assessment, it used the criteria set forth in 2013 by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control—Integrated Framework. As a result of this assessment management has concluded that, as of December 31, 2020, its internal control over financial reporting is effective based on those criteria.

Ernst & Young LLP, the independent registered public accounting firm that audited our consolidated financial statements included in this Annual Report on Form 10-K, has issued an attestation report on the effectiveness of our internal control over financial reporting as of December 31, 2020. The report, which expresses an unqualified opinion on the effectiveness of our internal control over financial reporting as of December 31, 2020, is included herein under the heading “Report of Independent Registered Public Accounting Firm” relative to internal control over financial reporting.

By:	/S/    MICHAEL N. MEARS
	Chairman of the Board, President, Chief Executive Officer and Director of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.

By:	/S/    JEFF HOLMAN
	Senior Vice President, Chief Financial Officer and Treasurer of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.

56

Report of Independent Registered Public Accounting Firm

To the Common Unitholders of Magellan Midstream Partners, L.P. and the Board of Directors of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Magellan Midstream Partners, L.P. (the Partnership) as of December 31, 2020 and 2019, the related consolidated statements of income, comprehensive income, partners’ capital and cash flows for each of the three years in the period ended December 31, 2020, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Partnership at December 31, 2020 and 2019, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2020, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Partnership’s internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated -February 18, 2021 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Partnership’s management. Our responsibility is to express an opinion on the Partnership’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Partnership in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the account or disclosures to which it relates.

57

	Defined Benefit Pension Obligation
Description of the Matter	At December 31, 2020, the Partnership’s defined benefit pension obligation was $444 million and exceeded the fair value of pension plan assets of $296 million, resulting in a net pension obligation of $148 million. As discussed in Note 11 to the consolidated financial statements, the Partnership reviews and updates the assumptions used to measure the defined benefit pension obligation on an annual basis. Auditing the pension obligation was complex due to the judgmental nature of certain actuarial assumptions used in the measurement process, including the discount rate, mortality rates, retirement rate and future compensation levels. The projected benefit obligation was sensitive to these assumptions.
How We Addressed the Matter in Our Audit	We obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the Partnership’s review of the defined benefit pension obligation calculations, the significant actuarial assumptions and the data inputs provided to the third-party actuary. To test the defined benefit pension obligation, our audit procedures included, among others, evaluating the methodology used, the significant actuarial assumptions discussed above and the underlying data used in the measurement process. We compared the actuarial assumptions used by management to historical trends and evaluated the change in the defined benefit pension obligation from the prior year resulting from the change in service cost, interest cost, actuarial gains and losses, benefit payments, contributions and other activities. In addition, we involved our actuarial specialists to assist with our procedures including, among others, evaluating management’s methodology for determining the discount rate that reflects the maturity and duration of the benefit payments and that is used to measure the defined benefit pension obligation. As part of this assessment, we compared the projected cash flows used in the current year measurement of the pension obligation to those in the prior year and compared the current year benefits paid to the prior year projected payments. To evaluate the future mortality rates, retirement rate and future compensation levels, we assessed whether the information is consistent with publicly available information, and whether any market data adjusted for entity-specific adjustments were applied. We also tested the completeness and accuracy of the underlying data, including the participant data used in the actuarial calculations.

/s/ Ernst & Young LLP

We have served as the Partnership’s auditor since 1999.

Tulsa, Oklahoma

February 18, 2021

58

Report of Independent Registered Public Accounting Firm

To the Common Unitholders of Magellan Midstream Partners, L.P. and the Board of Directors of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.

Opinion on Internal Control Over Financial Reporting

We have audited Magellan Midstream Partners, L.P.’s internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, Magellan Midstream Partners, L.P. (the Partnership) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2020, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Partnership as of December 31, 2020 and 2019, the related consolidated statements of income, comprehensive income, partners’ capital and cash flows for each of the three years in the period ended December 31, 2020, and the related notes and our report dated February 18, 2021 expressed an unqualified opinion thereon.

Basis for Opinion

The Partnership’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Partnership’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Partnership in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

An entity’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. An entity’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the entity; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the entity are being made only in accordance with authorizations of management and directors of the entity; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the entity’s assets that could have a material effect on the financial statements.

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Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Tulsa, Oklahoma

February 18, 2021

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MAGELLAN MIDSTREAM PARTNERS, L.P.

CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except per unit amounts)

	Year Ended December 31,
	2018		2019		2020
Transportation and terminals revenue	$	1,878,988	$	1,970,630	$	1,794,854
Product sales revenue	927,220		736,092		611,719
Affiliate management fee revenue	20,365		21,190		21,229
Total revenue	2,826,573		2,727,912		2,427,802
Costs and expenses:
Operating	649,436		634,081		601,359
Cost of product sales	704,313		619,279		513,715
Depreciation, amortization and impairment	265,077		246,134		258,676
General and administrative	194,283		196,650		173,478
Total costs and expenses	1,813,109		1,696,144		1,547,228
Other operating income (expense)	—		2,975		101
Earnings of non-controlled entities	181,117		168,961		153,327
Operating profit	1,194,581		1,203,704		1,034,002
Interest expense	220,979		221,123		234,133
Interest capitalized	(17,455)		(19,284)		(11,270)
Interest income	(3,010)		(3,285)		(1,037)
Gain on disposition of assets	(353,797)		(28,966)		(12,887)
Other (income) expense	13,868		11,830		5,164
Income before provision for income taxes	1,333,996		1,022,286		819,899
Provision for income taxes	71		1,437		2,934
Net income	$	1,333,925	$	1,020,849	$	816,965
Basic net income per common unit	$	5.84	$	4.46	$	3.62
Diluted net income per common unit	$	5.84	$	4.46	$	3.62
Weighted average number of common units outstanding used for basic net income per unit calculation	228,377		228,658		225,503
Weighted average number of common units outstanding used for diluted net income per unit calculation	228,573		228,842		225,531

See notes to consolidated financial statements.

61

MAGELLAN MIDSTREAM PARTNERS, L.P.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

	Year Ended December 31,
	2018		2019		2020
Net income	$	1,333,925	$	1,020,849	$	816,965
Other comprehensive income (loss):
Derivative activity:
Net gain (loss) on cash flow hedges	4,317		(25,216)		(9,484)
Reclassification of net loss on cash flow hedges to income	2,958		2,736		3,445
Changes in employee benefit plan assets and benefit obligations recognized in other comprehensive income:
Net actuarial loss	(2,323)		(27,351)		(23,499)
Curtailment gain	—		—		1,703
Recognition of prior service credit amortization in income	(181)		(181)		(181)
Recognition of actuarial loss amortization in income	10,352		5,820		5,934
Recognition of settlement cost in income	1,964		2,606		969
Total other comprehensive income (loss)	17,087		(41,586)		(21,113)
Comprehensive income	$	1,351,012	$	979,263	$	795,852

See notes to consolidated financial statements.

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MAGELLAN MIDSTREAM PARTNERS, L.P.

CONSOLIDATED BALANCE SHEETS

(In thousands)

	December 31,
	2019		2020
ASSETS
Current assets:
Cash and cash equivalents	$	58,030	$	13,036
Trade accounts receivable	125,440		109,136
Other accounts receivable	23,887		37,075
Inventory	184,399		167,389
Commodity derivatives deposits	27,415		34,165
Other current assets	40,237		44,392
Total current assets	459,408		405,193
Property, plant and equipment	8,431,227		8,352,825
Less: accumulated depreciation	2,027,193		2,091,134
Net property, plant and equipment	6,404,034		6,261,691
Investments in non-controlled entities	1,240,551		1,213,856
Right-of-use asset, operating leases	171,868		166,078
Long-term receivables	20,782		22,755
Goodwill	53,260		52,830
Other intangibles (less accumulated amortization of $6,255 and $9,228 at December 31, 2019 and 2020, respectively)	47,898		44,925
Restricted cash	26,569		9,411
Other noncurrent assets	13,359		20,243
Total assets	$	8,437,729	$	8,196,982
LIABILITIES AND PARTNERS’ CAPITAL
Current liabilities:
Accounts payable	$	150,992	$	100,022
Accrued payroll and benefits	75,511		52,490
Accrued interest payable	64,276		58,998
Accrued taxes other than income	66,007		68,313
Deferred revenue	109,654		98,897
Accrued product liabilities	90,788		79,166
Commodity derivatives contracts, net	10,222		22,372
Current portion of operating lease liability	26,221		27,533
Other current liabilities	73,205		50,783
Total current liabilities	666,876		558,574
Long-term operating lease liability	144,023		137,483
Long-term debt, net	4,706,075		4,978,691
Long-term pension and benefits	145,992		163,776
Other noncurrent liabilities	59,735		54,652
Commitments and contingencies
Partners’ capital:
Common unitholders (228,403 units and 223,120 units outstanding at December 31, 2019 and 2020, respectively)	2,877,105		2,486,996
Accumulated other comprehensive loss	(162,077)		(183,190)
Total partners’ capital	2,715,028		2,303,806
Total liabilities and partners’ capital	$	8,437,729	$	8,196,982

See notes to consolidated financial statements.

63

MAGELLAN MIDSTREAM PARTNERS, L.P.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

	Year Ended December 31,
	2018		2019		2020
Operating Activities:
Net income	$	1,333,925	$	1,020,849	$	816,965
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and impairment expense	265,077		246,134		258,676
Gain on sale and retirement of assets	(328,055)		(28,966)		(12,887)
Earnings of non-controlled entities	(181,117)		(168,961)		(153,327)
Distributions from operations of non-controlled entities	196,686		203,602		207,600
Equity-based incentive compensation expense	32,053		24,012		11,985
Settlement cost, amortization of prior service credit and actuarial loss	12,135		8,245		6,722
Debt extinguishment costs	—		8,270		12,893
Changes in components of operating assets and liabilities (Note 8)	22,246		7,994		(41,249)
Net cash provided by operating activities	1,352,950		1,321,179		1,107,378
Investing Activities:
Additions to property, plant and equipment, net(1)	(552,257)		(943,990)		(439,574)
Proceeds from sale and disposition of assets	576,568		65,366		334,894
Investments in non-controlled entities	(216,424)		(212,380)		(95,068)
Distributions from returns of investments in non-controlled entities	1,786		8,494		501
Deposits received from undivided joint interest third party	71,071		75,258		—
Net cash used by investing activities	(119,256)		(1,007,252)		(199,247)
Financing Activities:
Distributions paid	(865,431)		(921,606)		(927,117)
Repurchase of common units	—		—		(276,940)
Borrowings under long-term notes	—		996,405		828,434
Debt placement costs	(404)		(12,012)		(7,583)
Payments on notes	(250,000)		(550,000)		(550,000)
Debt extinguishment costs	—		(8,270)		(12,893)
Net receipt (payment) on financial derivatives	24,619		(33,342)		(9,484)
Payments associated with settlement of equity-based incentive compensation	(9,285)		(9,764)		(14,700)
Net cash used by financing activities	(1,100,501)		(538,589)		(970,283)
Change in cash, cash equivalents and restricted cash	133,193		(224,662)		(62,152)
Cash, cash equivalents and restricted cash at beginning of period	176,068		309,261		84,599
Cash, cash equivalents and restricted cash at end of period	$	309,261	$	84,599	$	22,447
Supplemental non-cash investing and financing activities:
(1) Additions to property, plant and equipment	$	(562,296)	$	(980,575)	$	(358,765)
Changes in accounts payable and other current liabilities related to capital expenditures	10,039		36,585		(80,809)
Additions to property, plant and equipment, net	$	(552,257)	$	(943,990)	$	(439,574)

See notes to consolidated financial statements.

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MAGELLAN MIDSTREAM PARTNERS, L.P.

CONSOLIDATED STATEMENT OF PARTNERS’ CAPITAL

(In thousands)

	Common Unitholders		Accumulated Other Comprehensive Loss			Total Partners’ Capital
Balance, January 1, 2018	$	2,267,231		$	(137,578)	$	2,129,653
Comprehensive income:
Net income	1,333,925			—		1,333,925
Total other comprehensive income (loss)	—			17,087		17,087
Total comprehensive income (loss)	1,333,925			17,087		1,351,012
Distributions	(865,431)			—		(865,431)
Equity-based incentive compensation expense	32,053			—		32,053
Issuance of common units in settlement of equity-based incentive plan awards	120			—		120
Payments associated with settlement of equity-based incentive compensation	(9,285)			—		(9,285)
ASC 606 cumulative effect	5,975			—		5,975
Other	(663)			—		(663)
Balance, December 31, 2018	2,763,925			(120,491)		2,643,434
Comprehensive income:
Net income	1,020,849			—		1,020,849
Total other comprehensive income (loss)	—			(41,586)		(41,586)
Total comprehensive income (loss)	1,020,849			(41,586)		979,263
Distributions	(921,606)			—		(921,606)
Equity-based incentive compensation expense	24,012			—		24,012
Issuance of common units in settlement of equity-based incentive plan awards	480			—		480
Payments associated with settlement of equity-based incentive compensation	(9,764)			—		(9,764)
Other	(791)			—		(791)
Balance, December 31, 2019	2,877,105			(162,077)		2,715,028
Comprehensive income:
Net income	816,965			—		816,965
Total other comprehensive income (loss)	—			(21,113)		(21,113)
Total comprehensive income (loss)	816,965			(21,113)		795,852
Distributions	(927,117)			—		(927,117)
Equity-based incentive compensation expense	11,985			—		11,985
Repurchase of common units	(276,940)			—		(276,940)
Issuance of common units in settlement of equity-based incentive plan awards	600			—		600
Payments associated with settlement of equity-based incentive compensation	(14,700)			—		(14,700)
Other	(902)			—		(902)
Balance, December 31, 2020	$	2,486,996		$	(183,190)	$	2,303,806

See notes to consolidated financial statements.

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MAGELLAN MIDSTREAM PARTNERS, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Organization and Description of Business

Organization

Unless indicated otherwise, the terms “our,” “we,” “us” and similar language refer to Magellan Midstream Partners, L.P. together with its subsidiaries. Magellan Midstream Partners, L.P. is a Delaware limited partnership, and its common units are traded on the New York Stock Exchange under the ticker symbol “MMP.” Magellan GP, LLC, a wholly owned Delaware limited liability company, serves as its general partner.

Description of Business

We are principally engaged in the transportation, storage and distribution of refined petroleum products and crude oil. As of December 31, 2020, our asset portfolio consisted of:

•our refined products segment, comprised of our approximately 9,800-mile refined petroleum products pipeline system with 54 terminals as well as 25 independent terminals not connected to our pipeline system and two marine storage terminals (one of which is owned through a joint venture); and

•our crude oil segment, comprised of approximately 2,200 miles of crude oil pipelines, a condensate splitter and 37 million barrels of aggregate storage capacity, of which approximately 27 million barrels are used for contract storage. Approximately 1,000 miles of these pipelines, the condensate splitter and 30 million barrels of this storage capacity (including 24 million barrels used for contract storage) are wholly-owned, with the remainder owned through joint ventures.

Description of Products

The following terms are commonly used in our industry to describe products that we transport, store, distribute or otherwise handle through our petroleum pipelines and terminals:

•refined products are the output from crude oil refineries that are primarily used as fuels by consumers. Refined products include gasoline, diesel fuel, aviation fuel, kerosene and heating oil.  Diesel fuel, kerosene and heating oil are also referred to as distillates;

•transmix is a mixture that forms when different refined products are transported in pipelines. Transmix is fractionated and blended into usable refined products;

•liquefied petroleum gases, or LPGs, are liquids produced as by-products of the crude oil refining process and in connection with natural gas production. LPGs include butane and propane;

•blendstocks are products blended with refined products to change or enhance their characteristics such as increasing a gasoline’s octane or oxygen content. Blendstocks include alkylates, oxygenates and natural gasoline;

•crude oil, which includes condensate, is a naturally occurring unrefined petroleum product recovered from underground that is used as feedstock by refineries, splitters and petrochemical facilities; and

•renewable fuels, such as ethanol, biodiesel and renewable diesel, are fuels derived from living materials and typically blended with other refined products as required by government mandates.

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We use the term petroleum products to describe any, or a combination, of the above-noted products.

2.Summary of Significant Accounting Policies

Significant Accounting Policies

Basis of Presentation. Our consolidated financial statements include our refined products and crude oil operating segments. We consolidate all entities in which we have a controlling ownership interest. We apply the equity method of accounting to investments in entities over which we exercise significant influence but do not control. We eliminate all intercompany transactions.

Reclassifications. Certain prior year amounts have been reclassified to conform with the current period’s presentation.

Use of Estimates. The preparation of our consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities that exist at the date of our consolidated financial statements, as well as their impact on the reported amounts of revenue and expense during the reporting periods. Actual results could differ from those estimates.

Cash Equivalents. Cash and cash equivalents include demand and time deposits and funds that own highly marketable securities with original maturities of three months or less when acquired. We periodically assess the financial condition of the institutions where we hold these funds, and, at December 31, 2019 and 2020, we believed our credit risk relative to these funds was minimal.

Restricted Cash. Restricted cash includes cash that we are contractually required to use for the construction of fixed assets and is unavailable for general use. It is classified as noncurrent due to its designation to be used for the construction of noncurrent assets.

Accounts Receivable and Allowance for Doubtful Accounts. Accounts receivable represent valid claims against customers. We recognize accounts receivable when we sell products or render services and collection of the receivable is probable. We extend credit terms to certain customers after a review of various credit indicators. We establish an allowance for doubtful accounts using an expected credit loss approach and evaluate reserves no less than quarterly to determine their adequacy. Judgments relative to at-risk accounts include the customers’ current financial condition, the customers’ historical relationship with us and current and projected economic conditions. We write off accounts receivable when we deem an account uncollectible.

Product Overages and Shortages. Each period end we measure the volume of each type of product in our pipeline systems and terminals, which is compared to the volumes of our customers’ inventories (as adjusted for tender deductions).  To the extent the product volumes in our pipeline systems and terminals exceed the volumes of our customers’ book inventories, we recognize a gain from the product overage and increase our product inventories. To the extent the product in our pipeline systems and terminals is less than our customers’ book inventories, we recognize a loss from the product shortage and we record a liability for product owed to our customers.  The product overages we recognize are recorded based on market prices, and the resulting inventory is carried at weighted average cost.  The product shortages we recognize are recorded based on our weighted average cost.  Additionally, when product shortages result in a net short inventory position, the related liability is recorded based on period-end market prices.  Product overages and shortages as well as adjustments to the value of net short inventory positions are recorded in operating expenses on our consolidated statements of income.

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Income Taxes. We are a partnership for income tax purposes and therefore are not subject to federal or state income taxes for most of the states in which we operate. The tax on our net income is borne by our unitholders through allocation to them of their share of taxable income. Net income for financial statement purposes may differ significantly from taxable income of unitholders because of differences between the tax basis and financial reporting basis of assets and liabilities and the taxable income allocation requirements under our partnership agreement. The aggregate difference in the basis of our net assets for financial and tax reporting purposes cannot be readily determined because information regarding each unitholder’s tax attributes is not available to us.

The amounts recognized as provision for income taxes in our consolidated statements of income are primarily

comprised of partnership-level taxes levied by the state of Texas. This tax is based on revenues less direct costs of sale for our assets apportioned to the state of Texas.

Net Income Per Unit. We calculate basic net income per common unit for each period by dividing net income by the weighted-average number of common units outstanding. The difference between our actual common units outstanding and our weighted-average number of common units outstanding used to calculate net income per common unit is due to the impact of: (i) the phantom units issued to our independent directors, which are included in the calculation of basic and diluted weighted average units outstanding, and (ii) the weighted-average effect of units actually issued or repurchased during a period.  The difference between the weighted-average number of common units outstanding used for basic and diluted net income per unit calculations on our consolidated statements of income is primarily the dilutive effect of phantom unit awards granted pursuant to our long-term incentive plan, which have not yet vested in periods where contingent performance metrics have been met.

Index of Additional Significant Accounting Policies

Revenue from Contracts with Customers	Note 4 – Revenue
Property, Plant and Equipment	Note 5 – Property, Plant and Equipment, Goodwill and Other Intangibles
Goodwill and Other Intangible Assets	Note 5 – Property, Plant and Equipment, Goodwill and Other Intangibles
Investments in Non-Controlled Entities	Note 6 – Investments in Non-Controlled Entities
Inventory	Note 7 – Inventory
Leases	Note 10 – Leases
Pension and Postretirement Medical and Life Benefit Obligations	Note 11 – Employee Benefit Plans
Equity-Based Incentive Compensation	Note 12 – Long-Term Incentive Plan
Derivative Financial Instruments	Note 13 – Derivative Financial Instruments
Contingencies and Environmental	Note 15 – Commitments and Contingencies

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—Continued

New Accounting Pronouncements

In June 2016, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments - Credit Losses (Topic 326). The new guidance is effective for reporting periods beginning after December 15, 2019. The standard replaces the incurred loss impairment methodology under current GAAP with a methodology that reflects expected credit losses and requires the use of a forward-looking expected credit loss model for accounts receivables, loans and other financial instruments. The standard requires a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. We adopted the new guidance as of January 1, 2020 using the modified retrospective approach related to our accounts receivables and contract assets, resulting in no cumulative adjustment to retained earnings. The adoption of this guidance did not have a material impact on our consolidated statements of income for the year ended December 31, 2020. 

3.Segment Disclosures

Our reportable segments are strategic business units that offer different products and services. Our segments are managed separately because each segment requires different marketing strategies and business knowledge. Management evaluates performance based on segment operating margin, which includes revenue from affiliates and third-party customers, operating expenses, cost of product sales, other operating (income) expense and earnings of non-controlled entities.

We believe that investors benefit from having access to the same financial measures used by management. Operating margin, which is presented in the following tables, is an important measure used by management to evaluate the economic performance of our core operations. Operating margin is not a GAAP measure, but the components of operating margin are computed using amounts that are determined in accordance with GAAP. A reconciliation of operating margin to operating profit, which is its nearest comparable GAAP financial measure, is included in the tables below. Operating profit includes depreciation, amortization and impairment expense and general and administrative (“G&A”) expense that management does not consider when evaluating the core profitability of our separate operating segments.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—Continued

	Year Ended December 31, 2018
	(in thousands)
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation and terminals revenue	$	1,316,616	$	566,063	$	(3,691)	$	1,878,988
Product sales revenue	880,453		46,767		—		927,220
Affiliate management fee revenue	5,533		14,832		—		20,365
Total revenue	2,202,602		627,662		(3,691)		2,826,573
Operating expenses	486,596		172,478		(9,638)		649,436
Cost of product sales	660,185		44,128		—		704,313
Earnings of non-controlled entities	(18,884)		(162,233)		—		(181,117)
Operating margin	1,074,705		573,289		5,947		1,653,941
Depreciation, amortization and impairment expense	202,047		57,083		5,947		265,077
G&A expenses	140,333		53,950		—		194,283
Operating profit	$	732,325	$	462,256	$	—	$	1,194,581
Additions to long-lived assets	$	357,359	$	148,995			$	506,354
	As of December 31, 2018
Segment assets	$	4,687,351	$	2,803,895			$	7,491,246
Corporate assets							256,291
Total assets							$	7,747,537
Goodwill	$	41,178	$	12,082			$	53,260
Investments in non-controlled entities	$	292,820	$	783,486			$	1,076,306

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—Continued

	Year Ended December 31, 2019
	(in thousands)
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation and terminals revenue	$	1,355,682	$	620,365	$	(5,417)	$	1,970,630
Product sales revenue	707,812		28,280		—		736,092
Affiliate management fee revenue	6,719		14,471		—		21,190
Total revenue	2,070,213		663,116		(5,417)		2,727,912
Operating expenses	471,743		173,261		(10,923)		634,081
Cost of product sales	591,228		28,051		—		619,279
Other operating (income) expense	(10,185)		7,210		—		(2,975)
Earnings of non-controlled entities	(8,070)		(160,891)		—		(168,961)
Operating margin	1,025,497		615,485		5,506		1,646,488
Depreciation, amortization and impairment expense	174,096		66,532		5,506		246,134
G&A expenses	140,735		55,915		—		196,650
Operating profit	$	710,666	$	493,038	$	—	$	1,203,704
Additions to long-lived assets	$	805,902	$	74,235			$	880,137
	As of December 31, 2019
Segment assets	$	5,411,920	$	2,894,733			$	8,306,653
Corporate assets							131,076
Total assets							$	8,437,729
Goodwill	$	41,178	$	12,082			$	53,260
Investments in non-controlled entities	$	422,384	$	818,167			$	1,240,551

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—Continued

	Year Ended December 31, 2020
	(in thousands)
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation and terminals revenue	$	1,241,846	$	559,570	$	(6,562)	$	1,794,854
Product sales revenue	578,630		33,089		—		611,719
Affiliate management fee revenue	6,270		14,959		—		21,229
Total revenue	1,826,746		607,618		(6,562)		2,427,802
Operating expenses	425,443		189,087		(13,171)		601,359
Cost of product sales	471,292		42,423		—		513,715
Other operating (income) expense	(3,247)		3,146		—		(101)
Earnings of non-controlled entities	(32,555)		(120,772)		—		(153,327)
Operating margin	965,813		493,734		6,609		1,466,156
Depreciation, amortization and impairment expense	175,510		76,557		6,609		258,676
G&A expenses	125,742		47,736		—		173,478
Operating profit	$	664,561	$	369,441	$	—	$	1,034,002
Additions to long-lived assets	$	291,863	$	56,401			$	348,264
	As of December 31, 2020
Segment assets	$	5,269,691	$	2,836,888			$	8,106,579
Corporate assets							90,403
Total assets							$	8,196,982
Goodwill	$	40,748	$	12,082			$	52,830
Investments in non-controlled entities	$	429,193	$	784,663			$	1,213,856

4. Revenue

Revenue recognition policies

Revenue is recognized upon the satisfaction of each performance obligation required by our customer contracts. Transportation and terminals revenue is recognized over time as our customers receive the benefits of our service as it is performed on their behalf using an output method based on actual deliveries. Revenue for our storage services is recognized over time using an output method based on the capacity of storage under contract with our customers. Product sales revenue is recognized at a point in time when our customers take control of the commodities purchased. We record back-to-back purchases and sales of petroleum products on a net basis.

We recognize pipeline transportation revenue for crude oil shipments when our customers’ product arrives at the customer-designated destination.  For shipments of refined products under published tariffs that combine transportation and terminalling services, we recognize revenue when our customers take delivery of their product from our system. For shipments where terminalling services are not included in the tariff, we recognize revenue when our customers’ product arrives at the customer-designated destination. We have certain contracts that require counterparties to ship a minimum volume over an agreed-upon time period, which are contracted as minimum dollar or volume commitments. Revenue pursuant to these take-or-pay contracts is recognized when the customers utilize their committed volumes. Additionally, when we estimate that the customers will not utilize all or a portion of their committed volumes, we recognize revenue in proportion to the pattern of exercised rights for the respective commitment period.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—Continued

Our interstate common carrier petroleum products pipeline operations are subject to rate regulation by the Federal Energy Regulatory Commission (“FERC”) under the Interstate Commerce Act, the Energy Policy Act of 1992 and rules and orders promulgated pursuant thereto. FERC regulation requires that interstate pipeline rates be filed with the FERC, be posted publicly and be nondiscriminatory and “just and reasonable.” The rates on approximately 40% of the shipments on our refined products pipeline system are regulated by the FERC primarily through an index methodology. As an alternative to cost-of-service or index-based rates, interstate pipeline companies may establish rates by obtaining authority to charge market-based rates in competitive markets or by negotiation with unaffiliated shippers. Approximately 60% of our refined products pipeline system’s markets are either subject to regulations by the states in which we operate or are approved for market-based rates by the FERC, and in both cases these rates can generally be adjusted at our discretion based on market factors. Most of the tariffs on our crude oil pipelines are established by negotiated rates that generally provide for annual adjustments in line with changes in the FERC index, subject to certain modifications.

For both our index-based rates and our market-based rates, our published tariffs serve as contracts, and shippers nominate the volume to be shipped up to a month in advance.  These tariffs include provisions which allow us to deduct from our customer’s inventory a small percentage of the products our customers transport on our pipeline systems. We refer to this non-monetary consideration as tender deduction revenue.  We receive tender deductions from our customers as consideration for product losses during the transportation of petroleum products within our pipeline systems.  Tender deduction revenue is generally recognized as transportation revenue when the customer's transported commodities reach their destination and is recorded at the fair value of the product received on the date received or the contract date, as applicable.

Product sales revenue pricing is contractually specified, and we have determined that each barrel sold represents a separate performance obligation. Transaction prices for our other services including terminalling, storage and ancillary services are typically contracted as a single performance obligation with our customers. In circumstances where multiple performance obligations are contractually required, we allocate the transaction price to the various performance obligations based on their relative standalone selling price.

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The following tables provide details of our revenues disaggregated by key activities that comprise our performance obligations by operating segment (in thousands):

	Year Ended December 31, 2018
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation	$	758,028	$	374,352	$	—	$	1,132,380
Terminalling	182,648		6,365		—		189,013
Storage	212,112		98,597		(3,691)		307,018
Ancillary services	136,122		26,151		—		162,273
Lease revenue	27,706		60,598		—		88,304
Transportation and terminals revenue	1,316,616		566,063		(3,691)		1,878,988
Product sales revenue	880,453		46,767		—		927,220
Affiliate management fee revenue	5,533		14,832		—		20,365
Total revenue	2,202,602		627,662		(3,691)		2,826,573
Revenue not under the guidance of ASC 606:
Lease revenue(1)	(27,706)		(60,598)		—		(88,304)
(Gains) losses from futures contracts included in product sales revenue(2)	(85,643)		632		—		(85,011)
Affiliate management fee revenue	(5,533)		(14,832)		—		(20,365)
Total revenue from contracts with customers under ASC 606	$	2,083,720	$	552,864	$	(3,691)	$	2,632,893

(1) Lease revenue is accounted for under ASC 840, Leases.

(2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—Continued

	Year Ended December 31, 2019
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation	$	787,688	$	381,654	$	—	$	1,169,342
Terminalling	185,008		17,822		—		202,830
Storage	215,042		119,330		(5,417)		328,955
Ancillary services	140,055		28,376		—		168,431
Lease revenue	27,889		73,183		—		101,072
Transportation and terminals revenue	1,355,682		620,365		(5,417)		1,970,630
Product sales revenue	707,812		28,280		—		736,092
Affiliate management fee revenue	6,719		14,471		—		21,190
Total revenue	2,070,213		663,116		(5,417)		2,727,912
Revenue not under the guidance of ASC 606:
Lease revenue(1)	(27,889)		(73,183)		—		(101,072)
(Gains) losses from futures contracts included in product sales revenue(2)	69,538		3,024		—		72,562
Affiliate management fee revenue	(6,719)		(14,471)		—		(21,190)
Total revenue from contracts with customers under ASC 606	$	2,105,143	$	578,486	$	(5,417)	$	2,678,212

(1) Lease revenue is accounted for under ASC 842, Leases.

(2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging.

	Year Ended December 31, 2020
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation	$	742,951	$	305,397	$	—	$	1,048,348
Terminalling	149,859		21,463		—		171,322
Storage	200,091		129,048		(6,562)		322,577
Ancillary services	125,268		26,936		—		152,204
Lease revenue	23,677		76,726		—		100,403
Transportation and terminals revenue	1,241,846		559,570		(6,562)		1,794,854
Product sales revenue	578,630		33,089		—		611,719
Affiliate management fee revenue	6,270		14,959		—		21,229
Total revenue	1,826,746		607,618		(6,562)		2,427,802
Revenue not under the guidance of ASC 606:
Lease revenue(1)	(23,677)		(76,726)		—		(100,403)
(Gains) losses from futures contracts included in product sales revenue(2)	(62,317)		3,624		—		(58,693)
Affiliate management fee revenue	(6,270)		(14,959)		—		(21,229)
Total revenue from contracts with customers under ASC 606	$	1,734,482	$	519,557	$	(6,562)	$	2,247,477

(1) Lease revenue is accounted for under ASC 842, Leases.

(2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—Continued

Balance Sheet Disclosures

We invoice customers on our refined products pipelines for transportation services when their product enters our system. At each period end, we record all invoiced amounts associated with products that have not yet been delivered (in-transit products) as a contract liability. This liability is presented as deferred revenue on our consolidated balance sheets. Deferred revenue is also recorded for pre-payments received in conjunction with take-or-pay contracts, storage contracts and other service offerings in which the service to our customers remains unfulfilled. Additionally, at each period end, we defer the direct costs we have incurred associated with our customers’ in-transit products as contract assets. Contract assets are presented on our consolidated balance sheets as other current assets. These direct costs are estimated based on our per-barrel direct delivery cost for the current period multiplied by the total in-transit barrels in our system at the end of the period multiplied by 50% to reflect the average transportation costs incurred for all products across all of our pipeline systems. We use 50% of the in-transit barrels because that best represents the average delivery point of all barrels in our pipeline system. These contract assets and contract liabilities are determined using judgments and assumptions that management considers reasonable.

The following table summarizes our accounts receivable, contract assets and contract liabilities resulting from contracts with customers (in thousands):

	December 31, 2019		December 31, 2020
Accounts receivable from contracts with customers	$	124,701	$	108,843
Contract assets	$	8,071	$	12,220
Contract liabilities	$	111,670	$	102,964

For the year ended December 31, 2020, we recognized $93.4 million of transportation and terminals revenue that was recorded in deferred revenue as of December 31, 2019.

Unfulfilled Performance Obligations

We have certain contracts with customers that represent customer commitments to purchase a minimum amount of our services over specified time periods. These contracts require us to provide services to our customers in the future and result in our having unfulfilled performance obligations (“UPOs”) to our customers related to the periods remaining under each contract. We have UPOs in many of our core business services, including transportation, terminalling and storage services. The UPOs will be recognized as revenue in the future as our customers utilize our services or when we estimate that our customers are not likely to use all or a portion of their commitments.

The following table provides the aggregate amount of the transaction price allocated to our UPOs as of December 31, 2020 by operating segment, including the range of years remaining on our contracts with customers and an estimate of revenues expected to be recognized over the next 12 months (dollars in thousands):

	Refined Products		Crude Oil		Total
Balances at December 31, 2020	$	2,015,459	$	1,262,305	$	3,277,764
Remaining terms	1 - 18 years		1 - 11 years
Estimated revenues from UPOs to be recognized in the next 12 months	$	383,897	$	273,782	$	657,679

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In computing the value of these future revenues, we have used the current rates in effect as of December 31, 2020 and have not included any estimates for future rate changes due to changes in the FERC index or other contractually negotiated rate escalations. Our UPO balances include the full amount of our customer commitments as of December 31, 2020 through the expiration of the related contracts. The UPO balances disclosed exclude all performance obligations for which the original expected term is one year or less, the consideration is variable or the future use of our services is fully at the discretion of our customers.

5.Property, Plant and Equipment, Goodwill and Other Intangibles

Property, Plant and Equipment

Property, plant and equipment consist primarily of pipeline, pipeline-related equipment, storage tanks and processing equipment. We state property, plant and equipment at cost except for certain acquired assets recorded at fair value on their respective acquisition dates and impaired assets. We record impaired assets at fair value on the last impairment evaluation date for which an adjustment was required.

We assign asset lives based on reasonable estimates when we place an asset into service. Subsequent events could cause us to change our estimates, which would affect the future calculation of depreciation expense.

When we sell or retire property, plant and equipment, we remove its carrying value and the related accumulated depreciation from our accounts and record any associated gains or losses on our consolidated statements of income in the period of sale or disposition.

We capitalize expenditures to replace existing assets and retire the replaced assets. We capitalize expenditures when they extend the useful life, increase the productivity or capacity or improve the safety or efficiency of the asset. We capitalize direct project costs such as labor and materials as incurred. Indirect project costs, such as overhead, are capitalized based on a percentage of direct labor charged to the respective capital project. We charge expenditures for maintenance, repairs and minor replacements to operating expense in the period incurred.

During construction, we capitalize interest on all construction projects requiring a completion period of three months or longer and total project costs exceeding $0.5 million. The interest we capitalize is based on the weighted-average interest rate of our debt. The weighted average rates used to capitalize interest on borrowed funds were 4.8%, 4.6% and 4.4% for the years ended December 31, 2018, 2019 and 2020, respectively.

Property, plant and equipment consisted of the following (in thousands):

					Estimated  Depreciable Lives
	December 31,
	2019		2020
Construction work-in-progress	$	515,312	$	125,173
Land and rights-of-way	336,982		385,190
Buildings	125,772		126,619		10 to 53 years
Storage tanks	2,206,839		2,085,601		10 to 49 years
Pipeline and station equipment	2,917,059		3,327,078		10 to 59 years
Processing equipment	2,044,589		2,006,835		3 to 56 years
Other	284,674		296,329		3 to 53 years
Property, Plant and Equipment, Gross	$	8,431,227	$	8,352,825

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Other includes total interest capitalized on construction in progress as of December 31, 2019 and 2020 of $86.4 million and $98.4 million, respectively. Depreciation expense for the years ended December 31, 2018, 2019 and 2020 was $214.4 million, $242.9 million and $256.0 million, respectively.

Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. In reviewing for impairment, the carrying value of such assets is compared to the estimated undiscounted future cash flows expected from the use of the assets and their eventual disposition. If such cash flows are not sufficient to support the asset’s recorded value, an impairment charge is recognized to reduce the carrying value of the long-lived asset to its estimated fair value. The determination of future cash flows as well as the estimated fair value of long-lived assets involves significant estimates on the part of management.

During 2018, we made the decision to discontinue commercial operations of our ammonia pipeline due to the system’s low profitability and challenging economic outlook. We estimated the fair value of the ammonia pipeline assets based on expected future cash flows and recognized a $49.1 million impairment charge in depreciation, amortization and impairment expense on our consolidated statements of income in 2018.

Goodwill

We record the excess of purchase price over the fair value of the tangible and identifiable intangible assets acquired and liabilities assumed in a business acquisition (or combination) as goodwill. The goodwill relating to each of our reporting units is tested for impairment annually as well as when an event or change in circumstances indicates an impairment may have occurred.

For purposes of performing the impairment test for goodwill, our reporting units are our refined products and crude oil segments.  In 2018, we elected to complete the quantitative goodwill impairment test and calculated that the fair value of each of our reporting units was greater than its carrying amount. In 2019 and 2020, we elected to perform the qualitative assessment for purposes of our annual goodwill impairment test and concluded that it was more likely than not that the fair value of each of our reporting units was greater than its carrying amount. Based on this assessment, we concluded goodwill was not impaired.

Other Intangibles

Other intangible assets with finite lives are amortized over their estimated useful lives of seven years up to 30 years. The weighted-average asset life of our other intangible assets at December 31, 2020 was approximately 18 years. We adjust the useful lives of our other intangible assets if events or circumstances indicate there has been a change in the remaining useful lives. We eliminate from our balance sheets the gross carrying amount and the related accumulated amortization for any fully amortized intangibles in the year they are fully amortized. During the years ended December 31, 2018, 2019 and 2020, amortization of other intangible assets was $1.6 million, $3.3 million and $2.7 million, respectively. 

6.Investments in Non-Controlled Entities

We account for interests in affiliates that we do not control using the equity method of accounting. Under this method, an investment is recorded at our acquisition cost or capital contributions, as adjusted by contractual terms, plus equity in earnings or losses since acquisition or formation, plus interest capitalized, less distributions received and amortization of interest capitalized and excess net investment. Excess net investment is the amount by which our investment in a non-controlled entity exceeded our proportionate share of the book value of the net assets of that investment. We amortize excess net investment over the weighted-average depreciable asset lives of the equity investee. Our unamortized excess net investment was $33.9 million and $33.0 million at December 31, 2019 and 2020, respectively. The amount of unamortized excess investment is primarily related to our investment in

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BridgeTex. We evaluate equity method investments for impairment whenever events or circumstances indicate that there is an other-than-temporary loss in value of the investment. In the event that we determine that the loss in value of an investment is other-than-temporary, we would record a charge to earnings to adjust the carrying value to fair value. We recognized no equity investment impairments during 2018, 2019 and 2020.

Our equity investments in non-controlled entities at December 31, 2020 were comprised of:

Entity	Ownership Interest
BridgeTex Pipeline Company, LLC (“BridgeTex”)	30%
Double Eagle Pipeline LLC (“Double Eagle”)	50%
HoustonLink Pipeline Company, LLC (“HoustonLink”)	50%
MVP Terminalling, LLC (“MVP”)	50%
Powder Springs Logistics, LLC (“Powder Springs”)	50%
Saddlehorn Pipeline Company, LLC (“Saddlehorn”)	30%
Seabrook Logistics, LLC (“Seabrook”)	50%
Texas Frontera, LLC (“Texas Frontera”)	50%

In the first quarter of 2020, we sold a 10% interest in Saddlehorn to an affiliate of Black Diamond Gathering LLC, which is majority-owned by Noble Midstream Partners LP, reducing our ongoing investment in Saddlehorn to a 30% interest. We received $79.9 million in cash from the sale, and we recorded a gain of $12.9 million on our consolidated statements of income for the year ended December 31, 2020.

We serve as operator of BridgeTex, HoustonLink, MVP, Powder Springs, Saddlehorn, Texas Frontera and the pipeline activities of Seabrook. We receive fees for management services as well as reimbursement or payment to us for certain direct operational payroll and other overhead costs. The management fees we receive are reported as affiliate management fee revenue on our consolidated statements of income. Cost reimbursements we receive from these entities in connection with our operating services are included as reductions to costs and expenses on our consolidated statements of income and totaled $3.9 million, $5.3 million and $3.6 million, respectively, for the years ended December 31, 2018, 2019 and 2020.

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We recorded the following revenue and expense transactions from certain of these non-controlled entities in our consolidated statements of income (in thousands):

	Year Ended December 31,
	2018		2019		2020
Transportation and terminals revenue:
BridgeTex, capacity lease	$	39,596	$	41,806	$	42,286
Double Eagle, throughput revenue	$	5,250	$	6,213	$	4,917
Saddlehorn, storage revenue	$	2,180	$	2,234	$	2,483
Operating costs:
Seabrook, storage lease and ancillary services	$	10,572	$	25,851	$	29,116
MVP, sale of air emission reduction credits (reduction of operating costs)	$	(2,161)	$	—	$	—
Product sales revenue:
Powder Springs, butane sales	$	4,899	$	—	$	—
Seabrook, product sales	$	—	$	328	$	—
Cost of product sales:
Powder Springs, butane purchases	$	410	$	—	$	—
Other operating income:
MVP, easement sale	$	—	$	289	$	—
Seabrook, gain on sale of air emission credits	$	—	$	—	$	1,410

Our consolidated balance sheets reflected the following balances related to our investments in non-controlled entities (in thousands):

	December 31, 2019
	Trade Accounts Receivable		Other Accounts Receivable		Other Accounts Payable		Long-Term Receivables
BridgeTex	$	392	$	26	$	—	$	—
Double Eagle	$	445	$	—	$	—	$	—
HoustonLink	$	60	$	—	$	—	$	—
MVP	$	—	$	418	$	—	$	—
Powder Springs	$	161	$	—	$	—	$	6,006
Saddlehorn	$	—	$	126	$	—	$	—
Seabrook	$	941	$	—	$	1,349	$	—

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	December 31, 2020
	Trade Accounts Receivable		Other Accounts Receivable		Other Accounts Payable		Long-Term Receivables
BridgeTex	$	355	$	27	$	970	$	—
Double Eagle	$	277	$	—	$	—	$	—
HoustonLink	$	—	$	—	$	144	$	—
MVP	$	—	$	467	$	2,297	$	—
Powder Springs	$	—	$	—	$	—	$	10,223
Saddlehorn	$	—	$	121	$	—	$	—
Seabrook	$	—	$	—	$	7,274	$	—

We entered into a long-term terminalling and storage contract with Seabrook for exclusive use of dedicated tankage that provides our customers with crude oil storage capacity and dock access for crude oil imports and exports on the Texas Gulf Coast (see Note 10 – Leases for more details regarding this lease).

The financial results from Powder Springs, MVP and Texas Frontera are included in our refined products segment and the financial results from BridgeTex, Double Eagle, HoustonLink, Saddlehorn and Seabrook are included in our crude oil segment, each as earnings of non-controlled entities.

A summary of our investments in non-controlled entities (representing only our proportionate interests) follows (in thousands):

Investments at December 31, 2019	$	1,240,551
Additional investment	95,068
Sale of ownership interest in Saddlehorn	(66,989)
Earnings of non-controlled entities:
Proportionate share of earnings	155,140
Amortization of excess investment and capitalized interest	(1,813)
Earnings of non-controlled entities	153,327
Less:
Distributions from operations of non-controlled entities	207,600
Distributions from returns of investments in non-controlled entities	501
Investments at December 31, 2020	$	1,213,856

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Summarized financial information of our non-controlled entities (representing 100% of the interests in these entities) follows (in thousands):

	December 31,
	2019		2020
Current assets	$	260,033	$	243,828
Noncurrent assets	2,768,696		2,846,747
Total assets	$	3,028,729	$	3,090,575
Current liabilities	$	160,566	$	143,638
Noncurrent liabilities	60,886		57,515
Total liabilities	$	221,452	$	201,153
Equity	$	2,807,277	$	2,889,422

	Year Ended December 31,
	2018		2019		2020
Revenue	$	631,420	$	782,013	$	752,685
Net income	$	416,128	$	507,464	$	471,438

7.Inventory

Inventory is comprised primarily of refined products, liquefied petroleum gases, transmix, crude oil and additives, which are stated and relieved at the lower of average cost or net realizable value.

Inventory at December 31, 2019 and 2020 was as follows (in thousands):

	December 31,
	2019		2020
Refined products	$	96,128	$	79,473
Liquefied petroleum gases	29,982		26,734
Transmix	39,546		23,397
Crude oil	12,714		32,431
Additives	6,029		5,354
Total inventory	$	184,399	$	167,389

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8.Consolidated Statements of Cash Flows

Changes in the components of operating assets and liabilities are as follows (in thousands):

	Year Ended December 31,
	2018		2019		2020
Trade accounts receivable and other accounts receivable	$	24,169	$	(20,156)	$	(1,172)
Inventory	(3,390)		1,336		15,771
Accounts payable	21,146		(1,237)		4,225
Accrued payroll and benefits	14,015		4,931		(23,269)
Accrued interest payable	(7,399)		1,018		(5,278)
Accrued taxes other than income	1,750		12,914		4,131
Deferred revenue	5,191		(11,431)		(10,757)
Accrued product liabilities	(20,677)		15,306		(11,622)
Other current and noncurrent assets and liabilities	(12,559)		5,313		(13,278)
Total	$	22,246	$	7,994	$	(41,249)

Other current and noncurrent assets and liabilities above exclude certain non-cash items that were reflected in the consolidated balance sheets but were not reflected in the statements of cash flows. At December 31, 2018, 2019 and 2020, the long-term pension and benefits liability was increased by $2.3 million, $27.0 million and $21.5 million, respectively, resulting in a corresponding increase in accumulated other comprehensive loss (“AOCL”).

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9.Debt

Long-term debt at December 31, 2019 and 2020 was as follows (in thousands): 

	December 31,
	2019		2020
4.25% Notes due 2021	$	550,000	$	—
3.20% Notes due 2025	250,000		250,000
5.00% Notes due 2026	650,000		650,000
3.25% Notes due 2030	—		500,000
6.40% Notes due 2037	250,000		250,000
4.20% Notes due 2042	250,000		250,000
5.15% Notes due 2043	550,000		550,000
4.20% Notes due 2045	250,000		250,000
4.25% Notes due 2046	500,000		500,000
4.20% Notes due 2047	500,000		500,000
4.85%Notes due 2049	500,000		500,000
3.95% Notes due 2050	500,000		800,000
Face value of long-term debt	4,750,000		5,000,000
Unamortized debt issuance costs(1)	(35,263)		(40,143)
Net unamortized debt premium (discount)(1)	(8,662)		18,834
Long-term debt, net	$	4,706,075	$	4,978,691

(1)    Debt issuance costs, note discounts and premiums and realized gains and losses of historical fair value hedges are being amortized or accreted to the applicable notes over the respective lives of those notes.

All of the instruments detailed in the table above are senior indebtedness.

At December 31, 2020, maturities of our debt were as follows: $0 in 2021 through 2024; $250 million in 2025; and $4.75 billion thereafter.

2020 Debt Issuances

In December 2020, we issued $300.0 million of our 3.95% senior notes due 2050. The notes, which are additional notes of the series originally issued in August 2019, were priced at 109.678% of par. Net proceeds from this offering were approximately $329.2 million after underwriting discounts and offering expenses, and including accrued interest. The net proceeds from this offering will be used for general partnership purposes, which may include repayment of indebtedness, including borrowings under our revolving credit facility and commercial paper program, capital expenditures and repurchases of our common units.

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In May 2020, we issued $500.0 million of 3.25% senior notes due 2030 in an underwritten public

offering. The notes were issued at 99.88% of par. Net proceeds from this offering were approximately $495.2 million after underwriting discounts and offering expenses. The net proceeds from this offering, along with commercial paper borrowings and cash on hand, were used to redeem our $550.0 million senior notes due in 2021. We recognized $12.9 million of debt extinguishment costs that were recorded as interest expense in our consolidated statements of income related to this early redemption, partially offset by the recognition of a $0.7 million unamortized debt premium, for the year ended December 31, 2020.

Other Debt

Revolving Credit Facility. At December 31, 2020, the total borrowing capacity under our revolving credit facility maturing in May 2024 was $1.0 billion. Any borrowings outstanding under this facility are classified as long-term debt on our consolidated balance sheets. Borrowings under the facility are unsecured and bear interest at LIBOR plus a spread ranging from 0.875% to 1.500% based on our credit ratings. Additionally, an unused commitment fee is assessed at a rate from 0.075% to 0.200% depending on our credit ratings. The unused commitment fee was 0.125% at December 31, 2020. Borrowings under this facility may be used for general purposes, including capital expenditures. As of December 31, 2019 and 2020, there were no borrowings under this facility and $3.5 million was obligated for letters of credit. Amounts obligated for letters of credit are not reflected as debt on our consolidated balance sheets, but decrease our borrowing capacity under the facility.

Our revolving credit facility requires us to maintain a specified ratio of consolidated debt to EBITDA (as defined in the credit agreement) of no greater than 5.0 to 1.0. In addition, the revolving credit facility and the indentures under which our senior notes were issued contain covenants that limit our ability to, among other things, incur indebtedness secured by certain liens or encumber our assets, engage in certain sale-leaseback transactions and consolidate, merge or dispose of all or substantially all of our assets. We were in compliance with these covenants as of and during the year ended December 31, 2020.

Commercial Paper Program. We have a commercial paper program under which we may issue commercial paper notes in an amount up to the available capacity under our $1.0 billion revolving credit facility. The maturities of the commercial paper notes vary, but may not exceed 397 days from the date of issuance. Because the commercial paper we can issue is limited to amounts available under our revolving credit facility, amounts outstanding under the program are classified as long-term debt. The commercial paper notes are sold under customary terms in the commercial paper market and are issued at a discount from par, or alternatively, are sold at par and bear varying interest rates on a fixed or floating basis. The weighted-average interest rate for commercial paper borrowings based on the number of days outstanding was 2.6% and 0.4% for the year ended December 31, 2019 and 2020, respectively. There were no borrowings outstanding under this program at December 31, 2019 and 2020.

During the years ending December 31, 2018, 2019 and 2020, total cash payments for interest on all indebtedness, excluding the impact of related interest rate swap agreements, were $227.8 million, $217.1 million and $234.5 million, respectively.

10.Leases

We have both lessee and lessor arrangements. Our leases are evaluated at inception or at any subsequent modification. Depending on the terms, leases are classified as either operating or finance leases if we are the lessee, or as operating, sales-type or direct financing leases if we are the lessor, as appropriate under ASC 842, Leases.  Our lessee arrangements primarily include a terminalling and storage contract where we have exclusive use of dedicated tankage, leased pipelines and office buildings. Our lessor arrangements include pipeline capacity and storage contracts and our condensate splitter tolling agreement that qualify as operating leases under ASC 842. In addition,

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we have a long-term throughput and deficiency agreement with a customer that is being accounted for as a sales-type lease under ASC 842.

In accordance with ASC 842, we have made an accounting policy election to not apply the standard to lessee arrangements with a term of one year or less and no purchase option that is reasonably certain of exercise. We will continue to account for these short-term arrangements by recognizing payments and expenses as incurred, without recording a lease liability and right-of-use asset.

We have also made an accounting policy election for both our lessee and lessor arrangements to combine lease and non-lease components. This election is applied to all of our lease arrangements as our non-lease components do not result in significant timing differences in the recognition of rental expenses or income.

Operating Leases – Lessee

We recognize a lease liability for each lease based on the present value of remaining minimum fixed rental payments (which includes payments under any renewal option that we are reasonably certain to exercise), using a discount rate that approximates the rate of interest we would have to pay to borrow on a collateralized basis over a similar term. We also recognize a right-of-use asset for each lease, valued at the lease liability, adjusted for prepaid or accrued rent balances existing at the time of initial recognition. The lease liability and right-of-use asset are reduced over the term of the lease as payments are made and the assets are used.

Related Party Operating Lease. We entered into a long-term terminalling and storage contract with Seabrook for exclusive use of dedicated tankage that provides our customers with crude oil storage capacity and dock access for crude oil imports and exports on the Texas Gulf Coast.

Minimum fixed rental payments are recognized on a straight-line basis over the life of the lease as costs and expenses on our consolidated statements of income. Variable and short-term rental payments are recognized as costs and expenses as they are incurred. Variable payments consist of amounts that exceed the contractual minimum rental payment (for example, payment increases tied to a change in a market index). Future minimum rental payments under operating leases with initial terms greater than one year as of December 31, 2020 are as follows (in thousands):

	Third Party Leases		Seabrook Lease		All Leases
2021	$	20,463	$	12,701	$	33,164
2022	20,609		9,919		30,528
2023	20,854		9,919		30,773
2024	16,956		9,643		26,599
2025	16,250		6,612		22,862
Thereafter	18,541		24,246		42,787
Total future minimum rental payments	113,673		73,040		186,713
Present value discount	11,593		$	10,104	$	21,697
Total operating lease liability	$	102,080	$	62,936	$	165,016

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The following tables provide further information about our operating leases (dollars in thousands):

	Year Ended 12/31/2019						Year Ended 12/31/2020
	Third Party Leases		Seabrook Lease		All Leases		Third Party Leases		Seabrook Lease		All Leases
Fixed lease expense	$	19,171	$	10,834	$	30,005	$	19,224	$	14,262	$	33,486
Short-term lease expense	1,603		—		1,603		1,334		—		1,334
Variable lease expense	3,058		15,017		18,075		4,105		14,854		18,959
Total lease expense	$	23,832	$	25,851	$	49,683	$	24,663	$	29,116	$	53,779

	As of and for the Year Ended
	December 31, 2019						December 31, 2020
	Third Party Leases		Seabrook Lease		All Leases		Third Party Leases		Seabrook Lease		All Leases
Current lease liability	$	15,136	$	11,085	$	26,221	$	17,099	$	10,434	$	27,533
Long-term lease liability	$	81,508	$	62,515	$	144,023	$	84,982	$	52,501	$	137,483
Right-of-use asset	$	98,268	$	73,600	$	171,868	$	103,142	$	62,936	$	166,078
Operating cash flows for operating leases	$	23,253	25,870		$	49,123	$	24,098	29,116		$	53,214
Weighted average remaining lease term (years)	6		8		7		6		7		7
Weighted-average discount rate	3.9%		4.0%		4.0%		3.7%		4.0%		3.8%

Rent expense was $42.1 million for the year ended December 31, 2018 and was recognized in accordance with ASC 840.

Operating Leases – Lessor

We recognize fixed rental income on a straight-line basis over the life of the lease as revenue on our consolidated statements of income. Variable rental payments are recognized as revenue in the period in which the circumstances on which the variable lease payments are based occur.

Future minimum payments receivable under operating leases with initial terms greater than one year as of December 31, 2020 are estimated as follows (in thousands):

2021	$	30,235
2022	21,322
2023	18,820
2024	18,562
2025	13,911
Thereafter	40,645
Total	$	143,495

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We recognized variable lease revenue of $51.8 million, $58.4 million and $61.4 million, respectively, for the years ended December 31, 2018, 2019 and 2020, primarily related to our condensate splitter.

At December 31, 2020, property, plant and equipment utilized by our customers in operating lease arrangements consisted of: $226.4 million of processing equipment; $58.3 million of storage tanks; $48.7 million of pipeline and station equipment; and $30.5 million of other assets. The processing equipment primarily relates to our condensate splitter.

Sales-Type Lease – Lessor

We entered into a long-term throughput and deficiency agreement with a customer on a pipeline and related assets that we constructed in Texas and New Mexico, which contains minimum volume/payment commitments. Our customer has the option to purchase this pipeline and related assets at the end of the lease term for a nominal amount. This agreement is accounted for as a sales-type lease under ASC 842. The net investment under this arrangement as of December 31, 2019 and 2020 was as follows (in thousands):

	December 31, 2019		December 31, 2020
Total minimum lease payments receivable	$	15,721	$	13,974
Less: Unearned income	2,814		2,257
Recorded net investment in sales-type lease	$	12,907	$	11,717

The net investment in this sales-type lease was classified in the consolidated balance sheets as follows (in millions):

	December 31, 2019		December 31, 2020
Other accounts receivable	$	1,190	$	1,245
Long-term receivables	11,717		10,472
Total	$	12,907	$	11,717

Future minimum payments receivable under this sales-type lease for the next five years are $1.7 million each year with $5.3 million due thereafter.

11.Employee Benefit Plans

Our pension and postretirement benefit liabilities represent the funded status of the present value of benefit obligations of our employee benefit plans. We develop pension, postretirement medical and life benefit costs from third-party actuarial valuations. We establish actuarial assumptions to anticipate future events and use those assumptions when calculating the expense and liabilities related to these plans. These factors include assumptions management makes concerning expected investment return on plan assets, discount rates, health care costs trend rates, turnover rates and rates of future compensation increases, among others. In addition, we use subjective factors such as withdrawal and mortality rates to develop actuarial valuations. Management reviews and updates these assumptions on an annual basis. The actuarial assumptions that we use may differ from actual results due to changing market rates or other factors. These differences could affect the amount of pension and postretirement medical and life benefit expense we will recognize in future periods.

Defined Contribution Plan. We sponsor a defined contribution plan in which we match our employees’ qualifying contributions, resulting in additional expense to us. Expenses related to the defined contribution plan

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were $11.0 million, $11.4 million and $12.2 million in 2018, 2019 and 2020, respectively.

Defined Benefit Plans. We sponsor two pension plans, including one for all non-union employees and one that covers union employees, and a postretirement benefit plan for certain employees. The annual measurement date of these plans is December 31.

The following table presents the changes in benefit obligations and plan assets for pension benefits and other postretirement benefits, as well as the end-of-period accumulated benefit obligation for the years ended December 31, 2019 and 2020 (in thousands):

	Pension Benefits				Other Postretirement Benefits
	2019		2020		2019		2020
Change in benefit obligations:
Benefit obligations at beginning of year	$	308,949	$	381,240	$	12,080	$	15,207
Service cost	25,406		27,736		193		258
Interest cost	12,163		10,989		507		479
Plan participants’ contributions	—		—		564		567
Actuarial loss	54,171		53,165		3,300		2,540
Benefits paid	(11,409)		(23,097)		(1,437)		(1,758)
Curtailment gain	—		(1,703)		—		—
Settlement payments	(8,040)		(4,685)		—		—
Benefit obligations at end of year	381,240		443,645		15,207		17,293
Change in plan assets:
Fair value of plan assets at beginning of year	197,590		249,293		—		—
Employer contributions	31,630		29,338		873		1,191
Plan participants’ contributions	—		—		564		567
Actual return on plan assets	39,522		43,560		—		—
Benefits paid	(11,409)		(23,097)		(1,437)		(1,758)
Settlement payments	(8,040)		(3,343)		—		—
Fair value of plan assets at end of year	249,293		295,751		—		—
Funded status at end of year	$	(131,947)	$	(147,894)	$	(15,207)	$	(17,293)
Accumulated benefit obligations	$	274,353	$	324,770

At December 31, 2019 and 2020, the accumulated benefit obligations of each of our plans exceeded the fair value of the related plans’ assets.

The pension plans actuarial loss in 2020 of $53.2 million is primarily due to the impact of decreases in the discount rates used to calculate the benefit obligations, partially offset by demographic changes. The pension benefit obligations experienced an actuarial loss of $54.2 million in 2019 primarily due to the impact of decreases in the discount rates used to calculate the benefit obligations, partially offset by changes in salary assumptions and higher asset returns.

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The following table summarizes information for pension plans with obligations in excess of plan assets (in thousands):

	December 31,
	2019		2020
Plans with a projected benefit obligation in excess of plan assets:
Projected benefit obligation	$	381,240	$	443,645
Fair value of plan assets	$	249,293	$	295,751
Plans with an accumulated benefit obligation in excess of plan assets:
Accumulated benefit obligation	$	274,353	$	324,770
Fair value of plan assets	$	249,293	$	295,751

Amounts recognized in the consolidated balance sheets included in these financial statements were as follows (in thousands):

	Pension Benefits				Other Postretirement Benefits
	2019		2020		2019		2020
Amounts recognized in consolidated balance sheets:
Current accrued benefit cost	$	—	$	—	$	1,162	$	1,411
Long-term pension and benefits	131,947		147,894		14,045		15,882
	131,947		147,894		15,207		17,293
Accumulated other comprehensive loss:
Net actuarial loss	(107,625)		(120,487)		(8,378)		(10,409)
Prior service credit	2,886		2,705		—		—
	(104,739)		(117,782)		(8,378)		(10,409)
Net amount of liabilities and accumulated other comprehensive loss recognized in consolidated balance sheets	$	27,208	$	30,112	$	6,829	$	6,884

Net periodic benefit expense for the years ended December 31, 2018, 2019 and 2020 was as follows (in thousands): 

	Pension Benefits						Other Postretirement Benefits
	2018		2019		2020		2018		2019		2020
Components of net periodic pension and postretirement benefit expense:
Service cost	$	38,167	$	25,406	$	27,736	$	243	$	193	$	258
Interest cost	14,907		12,163		10,989		416		507		479
Expected return on plan assets	(12,090)		(9,401)		(11,354)		—		—		—
Amortization of prior service credit	(181)		(181)		(181)		—		—		—
Amortization of actuarial loss	9,763		5,489		5,425		589		331		509
Settlement cost	1,964		2,606		969		—		—		—
Settlement gain on disposition of assets	—		—		(1,342)		—		—		—
Net periodic expense	$	52,530	$	36,082	$	32,242	$	1,248	$	1,031	$	1,246

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The service component of our net periodic benefit expense (credit) is presented in operating expense and G&A expense, and the non-service components are presented in other (income) expense in our consolidated statements of income.

Net periodic benefit expense for the year ended December 31, 2018 includes corrections of $19.4 million resulting from an error in our third-party actuary’s valuation of our pension liabilities and net periodic pension expense. In addition, long-term pension and benefits increased $22.2 million and accumulated other comprehensive loss increased $2.8 million in our 2018 consolidated balance sheets as a result of this valuation error.

Changes in plan assets and benefit obligations recognized in other comprehensive income (loss) during 2018, 2019 and 2020 were as follows (in thousands):

	Pension Benefits						Other Postretirement Benefits
	2018		2019		2020		2018		2019		2020
Beginning balance	$	(97,226)	$	(88,602)	$	(104,739)	$	(6,597)	$	(5,409)	$	(8,378)
Net actuarial gain (loss)	(2,922)		(24,051)		(20,959)		599		(3,300)		(2,540)
Amortization of prior service credit	(181)		(181)		(181)		—		—		—
Amortization of actuarial loss	9,763		5,489		5,425		589		331		509
Curtailment gain	—		—		1,703		—		—		—
Settlement cost	1,964		2,606		969		—		—		—
Amount recognized in other comprehensive loss	8,624		(16,137)		(13,043)		1,188		(2,969)		(2,031)
Ending balance	$	(88,602)	$	(104,739)	$	(117,782)	$	(5,409)	$	(8,378)	$	(10,409)

Actuarial gains and losses are amortized over the average future service period of the current active plan participants expected to receive benefits. The corridor approach is used to determine when actuarial gains and losses are to be amortized and is equal to 10% of the greater of the projected benefit obligation or the market related value of plan assets. The amount of gain or loss in excess of the calculated corridor is subject to amortization. The estimated net actuarial loss and prior service credit for the defined benefit pension plans that will be amortized from AOCL into net periodic benefit cost in 2021 are $6.2 million and $0.2 million, respectively. The estimated net actuarial loss for the other defined benefit postretirement plan that will be amortized from AOCL into net periodic benefit cost in 2021 is $0.6 million.

The weighted-average rate assumptions used to determine projected benefit obligations were as follows:

	Pension Benefits		Other Postretirement Benefits
	2019	2020	2019	2020
Discount rate	3.01%	2.23%	3.06%	2.30%
Rate of compensation increase	4.58%	4.53%	n/a	n/a
Cash balance interest crediting rate	2.16%	1.70%	n/a	n/a

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The weighted-average rate assumptions used to determine net pension and other postretirement benefit plans expense were as follows:

	Pension Benefits			Other Postretirement Benefits
	For the Year Ended December 31,			For the Year Ended December 31,
	2018	2019	2020	2018	2019	2020
Discount rate	3.63%	3.98%	3.01%	3.43%	4.08%	3.06%
Rate of compensation increase	6.38%	6.48%	4.58%	n/a	n/a	n/a
Expected rate of return on plan assets	6.00%	6.00%	4.50%	n/a	n/a	n/a
Cash balance interest crediting rate	3.15%	2.78%	2.16%	n/a	n/a	n/a

The non-pension postretirement benefit plans provide for retiree contributions and contain other cost-sharing features such as deductibles and coinsurance. The accounting for these plans anticipates future cost sharing that is consistent with management’s expressed intent to increase the retiree contribution rate generally in line with health care cost increases.

The annual assumed rate of increase in the health care cost trend rate for 2021 is 6.0% decreasing systematically to 5.08% by 2028 for pre-65 year old participants.

The fair values of the pension plan assets at December 31, 2019 were as follows (in thousands):

Asset Category	Total		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Domestic Equity Securities:(1)
Small-cap fund	$	5,087	$	5,087	$	—	$	—
Mid-cap fund	5,095		5,095		—		—
Large-cap fund	40,884		40,884		—		—
International equity fund	25,580		25,580		—		—
Fixed Income Securities:(1)
Short-term bond fund	3,590		3,590		—		—
Intermediate-term bond fund	29,485		29,485		—		—
Long-term investment grade bond funds	132,096		132,096		—		—
Other:
Short-term investment fund	7,300		7,300		—		—
Group annuity contract	176		—		—		176
Fair value of plan assets	$	249,293	$	249,117	$	—	$	176

(1) We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated.

The fair values of the pension plan assets at December 31, 2020 were as follows (in thousands):

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Asset Category	Total		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Domestic Equity Securities(1):
Small-cap fund	$	5,798	$	5,798	$	—	$	—
Mid-cap fund	5,853		5,853		—		—
Large-cap fund	47,598		47,598		—		—
International equity fund	29,876		29,876		—		—
Fixed Income Securities(1):
Short-term bond fund	4,209		4,209		—		—
Intermediate-term bond fund	34,894		34,894		—		—
Long-term investment grade bond funds	161,007		161,007		—		—
Other:
Short-term investment fund	6,354		6,354		—		—
Group annuity contract	162		—		—		162
Fair value of plan assets	$	295,751	$	295,589	$	—	$	162

(1) We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated.

As reflected in the tables above, Level 3 activity was not material.

The investment strategies for the various funds held as pension plan assets by asset category are as follows: 

Asset Category	Fund’s Investment Strategy
Domestic Equity Securities:
Small-cap fund	Seeks to track performance of the Center for Research in Security Prices (“CRSP”) US Small Cap Index
Mid-cap fund	Seeks to track performance of the CRSP US Mid Cap Index
Large-cap fund	Seeks to track performance of the Standard & Poor’s 500 Index
International equity fund	Seeks long-term growth of capital by investing 65% or more of assets in international equities
Fixed Income Securities:
Short-term bond fund	Seeks current income with limited price volatility through investment in primarily high quality bonds
Intermediate-term bond fund	Seeks moderate and sustainable level of current income by investing primarily in high quality fixed income securities with maturities from five to ten years
Long-term investment grade bond funds	Seek high and sustainable current income through investment primarily in long-term high grade bonds
Other:
Short-term investment fund	Invests in high quality short-term money market instruments issued by the U.S. Treasury
Group annuity contract	Earns interest quarterly equal to the effective yield of the 91-day U.S. Treasury bill

The expected long-term rate of return on plan assets was determined by combining a review of projected returns, historical returns of portfolios with assets similar to the current portfolios of the union and non-union pension plans and target weightings of each asset classification. Our investment objective for the assets within the

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pension plans is to earn a return that meets or exceeds the growth of obligations that result from interest and changes in the discount rate, while avoiding excessive risk. Defined diversification goals are set in order to reduce the risk of wide swings in the market value from year to year, or of incurring large losses that may result from concentrated positions. As a result, our plan assets have no significant concentrations of credit risk. Additionally, liquidity risks are minimized because all of the funds that the plans have invested in are publicly traded. We evaluate risks based on the potential impact to the predictability of contribution requirements, probability of under-funding, expected risk-adjusted returns and investment return volatility. Funds are invested with multiple investment managers. Our liabilities are calculated using rates defined by the Pension Protection Act of 2006. Approximately 70% of the plans’ investments are allocated to fixed-income securities and invested to match the durations of the plans’ short, intermediate and long-term pension liabilities, with the amount invested in each duration reflecting that duration’s proportion of the plans’ liabilities. The remaining approximately 30% of the plans’ investments are allocated to equity securities.

The target allocation and actual weighted-average asset allocation percentages at December 31, 2019 and 2020 were as follows:

	2019		2020
	Actual	Target	Actual	Target
Equity securities	30%	30%	30%	30%
Fixed income securities	67%	67%	68%	67%
Other	3%	3%	2%	3%

As of December 31, 2020, the benefit amounts expected to be paid from plan assets through December 31, 2030 were as follows (in thousands): 

	Pension Benefits		Other Postretirement Benefits
2021	$	21,404	$	1,410
2022	$	17,855	$	1,275
2023	$	21,413	$	1,168
2024	$	22,878	$	1,016
2025	$	23,629	$	975
2026 through 2030	$	145,885	$	3,929

Contributions estimated to be paid by us into the plans in 2021 are $29.7 million and $1.4 million for the pension and other postretirement benefit plans, respectively.

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12.Long-Term Incentive Plan

The compensation committee of our general partner’s board of directors administers our long-term incentive plan (“LTIP”) covering certain of our employees and the independent directors of our general partner. The LTIP primarily consists of phantom units and permits the grant of awards covering an aggregate of 11.9 million of our common units. The estimated units remaining available under the LTIP at December 31, 2020 totaled approximately 1.1 million. The awards include: (i) performance-based awards issued to certain officers and other key employees (“performance-based awards”), (ii) time-based awards issued to certain officers and other key employees (“time-based awards,” and together with performance-based awards, “employee awards”), and (iii) awards issued to independent members of our general partner’s board of directors (“director awards”) that may be deferred and if deferred may be paid in cash. All of the awards include distribution equivalent rights, except non-deferred director awards.

The LTIP requires employee awards to be settled in our common units, except the settlement of distribution equivalents, which we pay in cash. As a result, we classify employee awards as equity. Fair value for these awards is determined on the grant date, and we recognize this value as compensation expense ratably over the requisite service period, which is the vesting period of each award. The vesting period for employee awards is generally three years; however, certain awards have been issued with shorter vesting periods while others have vesting periods of up to four years. Because employee awards contain distribution equivalent rights, the fair value of our employee awards is based on the closing price of our units on the grant date.

Payouts for performance-based awards are subject to the attainment of a financial metric. Additionally, the 2018 and 2019 performance-based awards are subject to an adjustment for our total unitholder return (the “TUR adjustment”), and the fair value of these awards is adjusted for the fair value of the TUR adjustment. The financial metric for the performance-based awards is our distributable cash flow per unit excluding commodity-related activities for the last year of the three-year vesting period as compared to established threshold, target and stretch levels. The payouts for the performance-related component of the awards can range from 0% for results below threshold, up to 200% for actual results at stretch or above. The TUR adjustment is based on our total unitholder return at the end of the three-year vesting period of the awards in relation to the total unitholder returns of certain peer entities and can increase or decrease the payout of the award by as much as 50%. Payouts related to time-based awards are based solely on the completion of the requisite service period by the employee and contain no provisions that provide for a payout other than the original number of units awarded and the associated distribution equivalents.

Performance-based awards are subject to forfeiture if a participant’s employment is terminated for any reason other than for termination within two years of a change-in-control that occurs on an involuntary basis without cause or on a voluntary basis for good cause, or due to retirement, disability or death prior to the vesting date.  These awards can vest early under certain circumstances following a change in control. Time-based awards are subject to forfeiture if a participant’s employment is terminated for any reason other than retirement, death or disability prior to the vesting date, or as the result of certain other employment restrictions. If an employee award recipient retires, dies or becomes disabled prior to the end of the vesting period, the award is prorated based upon months of employment completed during the vesting period, and the award is settled shortly after the end of the vesting period.

Compensation expense for our equity awards is calculated as the number of unit awards less forfeitures, multiplied by the grant date fair value of those awards, multiplied by the percentage of the requisite service period completed at each period end, multiplied by the expected payout percentage, less previously-recognized compensation expense.

Non-deferred director awards are paid in units valued on the grant date, with compensation expense calculated as the number of units awarded multiplied by the fair value of those units at that date. We classify deferred director awards as liability awards because they may be settled in cash. Because deferred director awards have distribution

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equivalent rights, the fair value of these awards equals the closing price of our units at the measurement date. Compensation expense for deferred director awards is calculated as the number of units awarded, multiplied by the fair value of those awards on the measurement date, less previously-recognized compensation expense. Director awards deferred prior to 2015 are paid in January of the year following the director’s resignation from the board of directors of our general partner or death.  Director awards deferred after January 1, 2015 are paid 60 days following the director’s death or resignation from the board of directors of our general partner.

Non-Vested Unit Awards

The following table includes the changes during the current fiscal year in the number of non-vested units that have been granted by the compensation committee. The amounts below do not include adjustments for above-target or below-target performance.

	Performance-Based Awards			Time-Based Awards			Total Awards
	Number of Unit Awards	Weighted-Average Fair Value		Number of Unit Awards	Weighted-Average Fair Value		Number of Unit Awards	Weighted-Average Fair Value
Non-vested units - 1/1/2020	379,904	$	69.14	260,316	$	63.92	640,220	$	67.02
Units granted during 2020	189,632	$	61.16	198,450	$	61.18	388,082	$	61.17
Units vested during 2020	(196,142)	$	73.79	(75,089)	$	70.50	(271,231)	$	72.88
Units forfeited during 2020	(33,230)	$	65.70	(30,133)	$	62.90	(63,363)	$	64.37
Non-vested units - 12/31/20	340,164	$	62.35	353,544	$	61.07	693,708	$	61.70

The table below summarizes the total non-vested unit awards outstanding, including estimated targeted financial performance adjustments, to determine our total equity-based liability accrual.

Grant Date	Non-Vested Unit Awards	Performance Adjustment to Unit Awards	Total Unit Award Accrual	Vesting Date	Unrecognized Compensation Expense (in millions)(a)
Performance-Based Awards:
2019 Awards	164,706	(82,353)	82,353	12/31/2021	$	1.7
2020 Awards	175,458	—	175,458	12/31/2022	7.0
Time-Based Awards:
2021 Vesting Date	170,837	—	170,837	12/31/2021	3.4
2022 Vesting Date	182,707	—	182,707	12/31/2022	7.6
Total	693,708	(82,353)	611,355		$	19.7

(a) Unrecognized compensation expense will be recognized over the remaining vesting period of the awards.

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Weighted-Average Fair Value

The weighted-average fair value of awards granted during 2018, 2019 and 2020 was as follows:

	Performance-Based Awards			Time-Based Awards
	Number of Unit Awards	Weighted-Average Fair Value		Number of Unit Awards	Weighted-Average Fair Value
Units granted during 2018	218,923	$	73.80	83,564	$	71.03
Units granted during 2019	182,834	$	63.65	195,031	$	62.91
Units granted during 2020	189,632	$	61.16	198,450	$	61.18

Vested Unit Awards

The table below sets forth the numbers and values of units that vested in each of the three years ended December 31, 2020. The vested common units include adjustments for above-target financial and market performance.

Vesting Date	Vested Common Units	Fair Value of Unit Awards on Vesting Date (in millions)	Intrinsic Value of Unit Awards on Vesting Date (in millions)
12/31/2018	317,037	$22.1	$18.1
12/31/2019	436,629	$31.0	$27.5
12/31/2020	235,127	$15.2	$10.0

Cash Flow Effects of LTIP Settlements

The difference between the common units issued to the participants and the total number of unit awards vested primarily represents the tax withholdings associated with the award settlement, which we pay in cash.

Settlement Date	Number of Common Units Issued, Net of Tax Withholdings	Tax Withholdings and Other Cash Payments (in millions)	Employer Taxes (in millions)	Total Cash Payments (in millions)
January 2018	168,913	$9.3	$1.1	$10.4
January 2019	199,792	$9.8	$0.9	$10.7
January 2020	275,093	$14.7	$1.3	$16.0

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Compensation Expense Summary

Equity-based incentive compensation expense for 2018, 2019 and 2020, primarily recorded as G&A expense on our consolidated statements of income, was as follows (in thousands):

	Year Ended December 31,
	2018		2019		2020
Performance awards	$	28,728	$	17,920	$	3,087
Time-based awards	3,325		6,092		8,898
Total	$	32,053	$	24,012	$	11,985

During 2020, LTIP expense related to performance awards vesting in 2020 and 2021 decreased, reflecting the impacts of COVID-19-related reductions in economic activity.

13.Derivative Financial Instruments

We use derivative instruments to manage market price risks associated with inventories, interest rates and certain forecasted transactions. For those instruments that qualify for hedge accounting, the accounting treatment depends on their intended use and their designation. We classify derivative financial instruments qualifying for hedge accounting treatment into two categories: (1) cash flow hedges and (2) fair value hedges. We execute cash flow hedges to hedge against the variability in cash flows related to a forecasted transaction and execute fair value hedges to hedge against the changes in the value of a recognized asset or liability. At the inception of a hedged transaction, we document the relationship between the hedging instrument and the hedged item, the risk management objectives and the methods used for assessing and testing hedge effectiveness. We also assess, both at the inception of the hedge and on an on-going basis, whether the derivatives that are used in our hedging transactions are highly effective in offsetting changes in cash flows or fair value of the hedged item. If we determine that a derivative originally designated as a cash flow or fair value hedge is no longer highly effective, we discontinue hedge accounting prospectively and record the change in the fair value of the derivative in current earnings. The changes in fair value of derivative financial instruments that are not designated as hedges for accounting purposes, which we refer to as economic hedges, are included in current earnings.

As part of our risk management process, we assess the creditworthiness of the financial and other institutions with which we execute financial derivatives. Such financial instruments involve the risk of non-performance by the counterparty, which could result in material losses to us.

Interest Rate Derivatives

We periodically enter into interest rate derivatives to hedge the fair value of debt or hedge against variability in

interest rates. For interest rate cash flow hedges, we record the unrealized gains or losses as an adjustment to other comprehensive income. The realized gains and losses from our cash flow hedges are recognized into earnings as an adjustment to our periodic interest expense over the life of the related debt issuance. For fair value hedges on long-term debt, we record the unrealized gains or losses as an adjustment to long-term debt, and realized amounts as an adjustment to our periodic interest expense. Adjustments resulting from discontinued hedges continue to be recognized in accordance with their historic hedging relationships.

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In December 2020, upon issuance of an additional $300.0 million of 3.95% notes due 2050, we terminated and settled treasury lock agreements that we had previously entered into to protect against the variability of interest payments on this anticipated debt issuance for a gain of $1.0 million, which was included in our statements of cash flows as a net receipt on financial derivatives. These agreements were accounted for as cash flow hedges. The gain was recorded to other comprehensive income (loss) and will be recognized into earnings as an adjustment to our periodic interest expense over the term of the life of the associated notes.

In May 2020, upon issuance of $500.0 million of 3.25% notes due 2030, we terminated and settled treasury lock agreements that we had previously entered into to protect against the variability of interest payments on this anticipated debt issuance for a loss of $10.4 million, which was included in our statements of cash flows as a net payment on financial derivatives. These agreements were accounted for as cash flow hedges. The loss was recorded to other comprehensive income (loss) and will be recognized into earnings as an adjustment to our periodic interest expense over the term of the life of the associated notes.

In August 2019, upon issuance of our $500.0 million of 3.95% notes due 2050, we terminated and settled treasury lock agreements we had previously entered into to protect against the variability of interest payments on this anticipated debt issuance for a loss of $25.3 million, which was included in our statements of cash flows as a net payment on financial derivatives.  These agreements were accounted for as cash flow hedges. The loss was recorded to other comprehensive income (loss) and will be recognized into earnings as an adjustment to our periodic interest expense over the life of the associated notes.

In 2019, upon issuance of $500.0 million of 4.85% notes due 2049, we terminated and settled treasury lock agreements that we had previously entered into to protect against the variability of interest payments on this anticipated debt issuance for a loss of $8.0 million, which was included in our statements of cash flows as a net payment on financial derivatives. These agreements were accounted for as cash flow hedges. The loss was recorded to other comprehensive income (loss) and will be recognized into earnings as an adjustment to our periodic interest expense over the life of the associated notes.

During 2018, we terminated and settled $200.0 million of interest rate derivative agreements with cumulative gains of $24.6 million. These agreements were previously entered into to protect against the risk of variability of interest payments on debt we issued in 2019. These agreements were accounted for as cash flow hedges. The gains were recorded to other comprehensive income (loss) and will be recognized into earnings as an adjustment to our periodic interest expense over the life of the associated notes. These gains were also reported as a net receipt on financial derivatives in the financing activities of our consolidated statements of cash flows in 2018.

Commodity Derivatives

Our gas liquids blending activities produce gasoline, and we can reasonably estimate the timing and quantities of sales of these products. We use a combination of exchange-based commodities futures contracts and forward purchase and sale contracts to help manage commodity price changes and mitigate the risk of decline in the product margin realized from our gas liquids blending activities. Further, certain of our other commercial operations generate petroleum products, and we also use futures contracts to hedge against price changes for some of these commodities.

Forward physical purchase and sale contracts that qualify for and are elected as normal purchases and sales are accounted for using traditional accrual accounting, whereby changes in the mark-to-market values of such contracts are not recognized in income, rather the revenues and costs associated with such transactions are recognized during the period when commodities are physically delivered or received. Physical forward commodity contracts subject to this exception are evaluated for the probability of future delivery and are periodically tested once the forecasted period has passed to determine whether similar forward contracts are probable of physical delivery in the future.

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We record the effective portion of the gains or losses for commodity-based contracts designated as fair value hedges as adjustments to the assets being hedged and the ineffective portions as well as amounts excluded from the assessment of hedge effectiveness as adjustments to other income or expense. We recognize the change in fair value of economic hedges that hedge against changes in the price of petroleum products that we expect to sell or purchase in the future currently in earnings as adjustments to product sales revenue, cost of product sales, or operating expenses, as applicable.

Our open futures contracts at December 31, 2020 were as follows:

Type of Contract/Accounting Methodology	Product Represented by the Contract and Associated Barrels	Maturity Dates
Futures - Economic Hedges	3.4 million barrels of refined products and crude oil	Between January 2021 and November 2022
Futures - Economic Hedges	0.1 million barrels of gas liquids	Between January and April 2021

Commodity Derivatives Contracts and Deposits Offsets

At December 31, 2019 and 2020, we had made margin deposits of $27.4 million and $34.2 million, respectively, for our futures contracts with our counterparties, which were recorded as current assets under commodity derivatives deposits on our consolidated balance sheets. We have the right to offset the combined fair values of our open futures contracts against our margin deposits under a master netting arrangement for each counterparty; however, we have elected to present the combined fair values of our open futures contracts separately from the related margin deposits on our consolidated balance sheets. Additionally, we have the right to offset the fair values of our futures contracts together for each counterparty, which we have elected to do, and we report the combined net balances on our consolidated balance sheets. A schedule of the derivative amounts we have offset and the deposit amounts we could offset under a master netting arrangement are provided below as of December 31, 2019 and 2020 (in thousands):

	Gross Amounts of Recognized Liabilities		Gross Amounts of Assets Offset in the Consolidated Balance Sheets		Net Amounts of Liabilities Presented in the Consolidated Balance Sheets		Margin Deposit Amounts Not Offset in the Consolidated Balance Sheets		Net Asset Amount(1)
As of December 31, 2019	$	(11,033)	$	811	$	(10,222)	$	27,415	$	17,193
As of December 31, 2020	$	(22,988)	$	1,690	$	(21,298)	$	34,165	$	12,867

(1) Amount represents the maximum loss we would incur if all of our counterparties failed to perform on their derivative contracts.

Basis Derivative Agreement

During 2019, we entered into a basis derivative agreement with a joint venture co-owner’s affiliate, and, contemporaneously, that affiliate entered into an intrastate transportation services agreement with the joint venture. Settlements under the basis derivative agreement are determined based on the basis differential of crude oil prices at different market locations and a notional volume of 30,000 barrels per day. As a result, we account for this agreement as a derivative. The agreement will expire in early 2022. We recognize the changes in fair value of this agreement based on forward price curves for crude oil in West Texas and the Houston Gulf Coast in other operating income (expense) in our consolidated statements of income. The liability for this agreement at December 31, 2019 and 2020, respectively, was $17.3 million and $10.2 million.

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Impact of Derivatives on Our Financial Statements

Comprehensive Income

The changes in derivative activity included in AOCL for the years ended December 31, 2018, 2019 and 2020 were as follows (in thousands):

	Year Ended December 31,
Derivative Gains (Losses) Included in AOCL	2018		2019		2020
Beginning balance	$	(33,755)	$	(26,480)	$	(48,960)
Net gain (loss) on interest rate contract cash flow hedges	4,317		(25,216)		(9,484)
Reclassification of net loss on cash flow hedges to income	2,958		2,736		3,445
Ending balance	$	(26,480)	$	(48,960)	$	(54,999)

The following is a summary of the effect on our consolidated statements of income for the years ended December 31, 2018, 2019 and 2020 of derivatives that were designated as cash flow hedges (in thousands):

	Interest Rate Contracts
	Amount of Gain (Loss) Recognized in AOCL on  Derivatives			Location of Loss Reclassified from AOCL into Income	Amount of Loss Reclassified from AOCL into Income
Year Ended December 31, 2018		$	4,317	Interest expense		$	(2,958)
Year Ended December 31, 2019		$	(25,216)	Interest expense		$	(2,736)
Year Ended December 31, 2020		$	(9,484)	Interest expense		$	(3,445)

As of December 31, 2020, the net loss estimated to be classified to interest expense over the next twelve months from AOCL is approximately $3.3 million. This amount relates to the amortization of losses on interest rate contracts over the life of the related debt instruments.

The following table provides a summary of the effect on our consolidated statements of income for the years ended December 31, 2018, 2019 and 2020 of derivatives that were not designated as hedging instruments (in thousands):

		Amount of Gain (Loss) Recognized on Derivative
		Year Ended December 31,
Derivative Instrument	Location of Gain (Loss) Recognized on Derivatives	2018		2019		2020
Futures contracts	Product sales revenue	$	85,012	$	(72,562)	$	58,693
Futures contracts	Cost of product sales	(15,947)		(1,931)		2,183
Basis derivative agreement	Other operating income (expense)	—		(10,252)		(4,253)
	Total	$	69,065	$	(84,745)	$	56,623

The impact of the derivatives in the above table was reflected as cash from operations on our consolidated statements of cash flows.

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Balance Sheets

The following tables provide a summary of the fair value of derivatives, which are presented on a net basis in our consolidated balance sheets, that were not designated as hedging instruments as of December 31, 2019 and 2020 (in thousands):

	December 31, 2019
	Asset Derivatives			Liability Derivatives
Derivative Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Futures contracts	Commodity derivatives contracts, net	$	811	Commodity derivatives contracts, net	$	11,033
Basis derivative agreement	Other current assets	—		Other current liabilities	8,457
Basis derivative agreement	Other noncurrent assets	—		Other noncurrent liabilities	8,847
	Total	$	811	Total	$	28,337
	December 31, 2020
	Asset Derivatives			Liability Derivatives
Derivative Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Futures contracts	Commodity derivatives contracts, net	$	616	Commodity derivatives contracts, net	$	22,988
Futures contracts	Other noncurrent assets	1,074		Other noncurrent liabilities	—
Basis derivative agreement	Other current assets	—		Other current liabilities	8,774
Basis derivative agreement	Other noncurrent assets	—		Other noncurrent liabilities	1,468
	Total	$	1,690	Total	$	33,230

14.Fair Value Disclosures

Fair Value Methods and Assumptions - Financial Assets and Liabilities

The following methods and assumptions were used in estimating fair value for our financial assets and liabilities:

•Commodity derivatives contracts. These include exchange-traded futures contracts related to petroleum products. These contracts are carried at fair value on our consolidated balance sheets and are valued based on quoted prices in active markets. See Note 13 – Derivative Financial Instruments for further disclosures regarding these contracts.

•Basis Derivative Agreement. During 2019, we entered into a basis derivative agreement with a joint venture co-owner’s affiliate, and, contemporaneously, that affiliate entered into an intrastate transportation services agreement with the joint venture. Settlements under the basis derivative agreement are determined based on the basis differential of crude oil prices at different market locations and a notional volume of 30,000 barrels per day (see Note 13 - Derivative Financial Instruments for further disclosures regarding this agreement). The fair value of this derivative was calculated based on observable market data inputs, including published commodity pricing data and market interest rates. The key inputs in the fair value calculation include the forward price curves for crude oil, the implied forward correlation in crude oil prices between West Texas and the Houston Gulf Coast, and the implied forward volatility for crude oil futures contracts.

•Long-term receivables. These primarily include payments receivable under a sales-type leasing arrangement and cost reimbursement payments receivable. These receivables were recorded at

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fair value on our consolidated balance sheets, using then-current market rates to estimate the present value of future cash flows.

•Guarantees and contractual obligations. At December 31, 2020, these primarily included a long-term contractual obligation we entered into in connection with the sale of our three marine terminals to a subsidiary of Buckeye Partners, L.P. (“Buckeye”). This obligation requires us to perform certain environmental remediation work on Buckeye’s behalf at the New Haven, Connecticut terminal.  The contractual obligation was recorded at fair value on our consolidated balance sheets upon initial recognition and was calculated using our best estimate of potential outcome scenarios to determine our liability for the remediation costs required in this agreement.

•Debt. The fair value of our publicly traded notes was based on the prices of those notes at December 31, 2019 and 2020; however, where recent observable market trades were not available, prices were determined using adjustments to the last traded value for that debt issuance or by adjustments to the prices of similar debt instruments of peer entities that are actively traded. The carrying amount of borrowings, if any, under our revolving credit facility and our commercial paper program approximates fair value due to the frequent repricing of these obligations.

Fair Value Measurements - Financial Assets and Liabilities

The following tables summarize the carrying amounts, fair values and fair value measurements recorded or disclosed as of December 31, 2019 and 2020, based on the three levels established by ASC 820; Fair Value Measurements and Disclosures (in thousands):

					Fair Value Measurements as of December 31, 2019 using:
Assets (Liabilities)	Carrying Amount		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Commodity derivatives contracts	$	(10,222)	$	(10,222)	$	(10,222)	$	—	$	—
Basis derivative agreement	$	(17,304)	$	(17,304)	$	—	$	(17,304)	$	—
Long-term receivables	$	20,782	$	20,782	$	—	$	—	$	20,782
Guarantees and contractual obligations	$	(408)	$	(408)	$	—	$	—	$	(408)
Debt	$	(4,706,075)	$	(5,192,685)	$	—	$	(5,192,685)	$	—

					Fair Value Measurements as of December 31, 2020 using:
Assets (Liabilities)	Carrying Amount		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Commodity derivatives contracts	$	(21,298)	$	(21,298)	$	(21,298)	$	—	$	—
Basis derivative agreement	$	(10,242)	$	(10,242)	$	—	$	(10,242)	$	—
Long-term receivables	$	22,755	$	22,755	$	—	$	—	$	22,755
Guarantees and contractual obligations	$	(11,207)	$	(11,207)	$	—	$	—	$	(11,207)
Debt	$	(4,978,691)	$	(5,880,850)	$	—	$	(5,880,850)	$	—

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15.Commitments and Contingencies

Certain conditions may exist as of the date our consolidated financial statements are issued that could result in a loss to us, but which will only be resolved when one or more future events occur or fail to occur. Our management assesses such contingent liabilities, which inherently involves significant judgment. In assessing loss contingencies related to legal proceedings that are pending against us or for unasserted claims that may result in proceedings, our management, with input from legal counsel, evaluates the perceived merits of any legal proceedings or unasserted claims as well as the perceived merits of the amount of relief sought or expected to be sought therein.

Environmental expenditures are charged to operating expense or capitalized based on the nature of the expenditures. Environmental expenditures that meet the capitalization criteria for property, plant and equipment, as well as costs that mitigate or prevent environmental contamination that has yet to occur, are capitalized. We expense expenditures that relate to an existing condition caused by past operations. We initially record environmental liabilities assumed in a business combination at fair value; otherwise, we record environmental liabilities on an undiscounted basis. We recognize liabilities for other commitments and contingencies when, after analyzing the available information, we determine it is probable that an asset has been impaired, or that a liability has been incurred and the amount of impairment or loss can be reasonably estimated. When we can estimate a range of probable loss, we accrue the most likely amount within that range, or if no amount is more likely than another, we accrue the minimum of the range of probable loss. We expense legal costs associated with loss contingencies as incurred.

We record environmental liabilities independently of any potential claim for recovery. Accruals related to environmental matters are generally determined based on site-specific plans for remediation, taking into account currently available facts, existing technologies and presently enacted laws and regulations. Accruals for environmental matters reflect our prior remediation experience and include an estimate for costs such as fees paid to contractors, outside engineering and consulting firms. Accruals for estimated losses from environmental remediation obligations generally are recognized no later than completion of the remediation feasibility study. Such accruals are adjusted as further information develops or circumstances change.

We maintain specific insurance coverage, which may cover all or portions of certain environmental expenditures less a deductible. We recognize receivables in cases where we consider the realization of reimbursements of remediation costs as probable. We would sustain losses to the extent of amounts we have recognized as environmental receivables if the counterparties to those transactions were unable to perform their obligations to us.

The determination of the accrual amounts recorded for environmental liabilities includes significant judgments and assumptions made by management. The use of alternate judgments and assumptions could result in the recognition of different levels of environmental remediation costs.

Butane Blending Patent Infringement Proceeding

On October 4, 2017, Sunoco Partners Marketing & Terminals L.P. (“Sunoco”) brought an action for patent infringement in the U.S. District Court for the District of Delaware alleging Magellan Midstream Partners, L.P. (“Magellan”) and Powder Springs Logistics, LLC (“Powder Springs”) have infringed patents relating to butane blending at the Powder Springs facility located in Powder Springs, Georgia. Sunoco subsequently submitted pleadings alleging that Magellan is also infringing various patents related to butane blending at nine Magellan facilities, in addition to Powder Springs. Sunoco is seeking monetary damages, attorneys’ fees and a permanent injunction enjoining Magellan and Powder Springs from infringing the subject patents. We deny and are vigorously defending against all claims asserted by Sunoco. Although it is not possible to predict the ultimate outcome, we

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believe the ultimate resolution of this matter will not have a material adverse impact on our results of operations, financial position or cash flows.

Environmental Liabilities

Liabilities recognized for estimated environmental costs were $14.9 million and $14.3 million at December 31, 2019 and December 31, 2020, respectively. We have classified environmental liabilities as other current or noncurrent based on management’s estimates regarding the timing of actual payments. Environmental expenses recognized as a result of changes in our environmental liabilities are included in operating expenses on our consolidated statements of income. Environmental expenses were $15.0 million, $4.4 million and $3.8 million for the years ended December 31, 2018, 2019 and 2020, respectively.

Other

In 2020, we entered into a long-term contractual obligation in connection with the sale of three marine terminals to Buckeye.  This obligation requires us to perform certain environmental remediation work on Buckeye’s behalf at the New Haven terminal.  As of December 31, 2020, our consolidated balance sheets reflected a current liability of $0.6 million and a noncurrent liability of $10.2 million to reflect the fair value of this obligation.

We have entered into an agreement to guarantee our 50% pro rata share, up to $25.0 million, of obligations under Powder Springs’ credit facility. As of December 31, 2020, our consolidated balance sheets reflected a $0.4 million other current liability and a corresponding increase in our investment in non-controlled entities on our consolidated balance sheets to reflect the fair value of this guarantee.

We and the non-controlled entities in which we own an interest are a party to various other claims, legal actions and complaints. While the results cannot be predicted with certainty, management believes the ultimate resolution of these claims, legal actions and complaints after consideration of amounts accrued, insurance coverage or other indemnification arrangements will not have a material adverse effect on our results of operations, financial position or cash flows.

16.Concentration of Risks

We transport, store and distribute petroleum products for refiners, producers, marketers, traders and end users of those products. Our revenue producing activities are concentrated in the central U.S. Concentrations of customers may affect our overall credit risk as our customers may be similarly affected by changes in economic, regulatory or other factors. We generally secure transportation and storage revenue with warehouseman’s liens. We periodically evaluate the financial condition and creditworthiness of our customers and require additional security as we deem necessary.

As of December 31, 2020, we had 1,720 employees, primarily concentrated in the central and Gulf Coast regions of the U.S. There were 934 employees assigned to our refined products segment, 253 employees assigned to our crude oil segment and 533 employees assigned to provide G&A services.  Approximately 13% of our employees are represented by the United Steel Workers and covered by a collective bargaining agreement that expires in January 2022.

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17.Related Party Transactions

Stacy Methvin is an independent member of our general partner’s board of directors and is also a director of one of our customers.  We received tariff, terminalling and other ancillary revenue from this customer of $21.7 million, $29.6 million and $37.4 million for the periods ending December 31, 2018, 2019 and 2020, respectively. We recorded a receivable of $3.8 million and $3.9 million from this customer at December 31, 2019 and 2020, respectively.  We also made a one-time payment of $0.2 million in 2019 to a subsidiary of this customer for an easement related to one of our expansion projects. Additionally, we received storage and other miscellaneous revenue of $0.5 million for the period ending December 31, 2020 from a subsidiary of a separate company for which Stacy Methvin serves as a director.

See Note 6 – Investments in Non-Controlled Entities for a discussion of transactions with our joint venture affiliates.

18.Partners’ Capital and Distributions

Partners’ Capital

Our general partner’s board of directors authorized the repurchase of up to $750 million of our common units through 2022. The timing, price and actual number of common units repurchased will depend on a number of factors including our expected expansion capital spending needs, excess cash available, balance sheet metrics, legal and regulatory requirements, market conditions and the trading price of our common units. The repurchase program does not obligate us to acquire any particular amount of common units, and the repurchase program may be suspended or discontinued at any time.

The following table details the changes in the number of our common units outstanding from January 1, 2018 through December 31, 2020:

Common units outstanding on January 1, 2018	228,024,556
January 2018—Settlement of employee LTIP awards	168,913
During 2018—Other(a)	1,691
Common units outstanding on December 31, 2018	228,195,160
February 2019—Settlement of employee LTIP awards	199,792
During 2019—Other(a)	8,476
Common units outstanding on December 31, 2019	228,403,428
Units repurchased during 2020	(5,568,260)
February 2020—Settlement of employee LTIP awards	275,093
During 2020—Other(a)	9,550
Common units outstanding on December 31, 2020	223,119,811

(a)Common units issued to settle the equity-based retainer paid to independent directors of our general partner.

Our partnership agreement allows us to issue additional partnership securities for any partnership purpose at any time and from time to time for consideration and on terms and conditions as our general partner determines, all without approval by our unitholders.

Common unitholders have the following rights, among others:

•right to receive distributions of our available cash within 45 days after the end of each quarter;

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•right to elect the board members of our general partner;

•right to remove Magellan GP, LLC as our general partner upon a 100% vote of outstanding unitholders;

•right to transfer common unit ownership to substitute common unitholders;

•right to receive an annual report, containing audited financial statements and a report on those financial statements by our independent public accountants, within 120 days after the close of the fiscal year end;

•right to receive information reasonably required for tax reporting purposes within 90 days after the close of the calendar year;

•right to vote according to the unitholder’s percentage interest in us at any meeting that may be called by our general partner; and

•right to inspect our books and records at the unitholder’s own expense.

In the event of liquidation, we would distribute all property and cash in excess of that required to discharge all liabilities to the unitholders in proportion to the positive balances in their respective capital accounts. The common unitholders’ liability is generally limited to their investment.

Distributions

Distributions we paid during 2018, 2019 and 2020 were as follows (in thousands, except per unit amount):

Payment Date	Per Unit Distribution Amount		Total Distribution
2/14/2018	$	0.9200	$	209,940
5/15/2018	0.9375		213,933
8/14/2018	0.9575		218,497
11/14/2018	0.9775		223,061
Total	$	3.7925	$	865,431
2/14/2019	$	0.9975	$	227,832
5/15/2019	1.0050		229,545
8/14/2019	1.0125		231,258
11/14/2019	1.0200		232,971
Total	$	4.0350	$	921,606
2/14/2020	$	1.0275	$	234,774
5/15/2020	1.0275		231,245
8/14/2020	1.0275		231,245
11/13/2020	1.0275		229,853
Total	$	4.1100	$	927,117

19. Subsequent Events

Recognizable events

No recognizable events have occurred subsequent to December 31, 2020.

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Non-recognizable events

On February 12, 2021, we paid distributions of $1.0275 per unit on our outstanding common units to unitholders of record at the close of business on February 5, 2021.

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Quarterly Financial Data (unaudited)

Summarized quarterly financial data is as follows (in thousands, except per unit amounts):

2019	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Revenue	$	628,935	$	701,699	$	656,596	$	740,682
Total costs and expenses	$	422,985	$	436,718	$	385,927	$	450,514
Operating margin	$	352,012	$	415,655	$	428,262	$	450,559
Net income	$	207,663	$	253,703	$	273,038	$	286,445
Basic net income per common unit	$	0.91	$	1.11	$	1.19	$	1.25
Diluted net income per common unit	$	0.91	$	1.11	$	1.19	$	1.25
2020
Revenue	$	782,806	$	460,408	$	598,264	$	586,324
Total costs and expenses	$	499,186	$	297,324	$	367,939	$	382,779
Operating margin	$	427,211	$	301,394	$	376,435	$	361,116
Net income	$	287,564	$	133,843	$	211,638	$	183,920
Basic net income per common unit	$	1.26	$	0.59	$	0.94	$	0.82
Diluted net income per common unit	$	1.26	$	0.59	$	0.94	$	0.82

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Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A.Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We performed an evaluation of the effectiveness of the design and operation of our “disclosure controls and procedures” (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of the end of the period covered by this report. We performed this evaluation under the supervision and with the participation of our management, including our general partner’s Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”). Based upon that evaluation, our general partner’s CEO and CFO concluded that, as of the end of the period covered by this report, our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms. Our disclosure controls and procedures include controls and procedures designed so that information required to be disclosed in reports filed or submitted under the Exchange Act is accumulated and communicated to management, including the CEO and the CFO, as appropriate, to allow timely decisions regarding required disclosure. There has been no change in our internal control over financial reporting that occurred during the quarter ended December 31, 2020 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Management’s Report on Internal Control Over Financial Reporting

See “Management’s Annual Report on Internal Control Over Financial Reporting” set forth in Item 8. Financial Statements and Supplementary Data.

Item 9B.Other Information

None.

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PART III

Item 10.Directors, Executive Officers and Corporate Governance

The information regarding the directors and executive officers of our general partner and our governance required by Items 401, 405, 406 and 407(c)(3), (d)(4) and (d)(5) of Regulation S-K will be presented in our definitive proxy statement to be filed pursuant to Regulation 14A (our “Proxy Statement”) under the following captions, which information is to be incorporated by reference herein:

•Director Election Proposal;

•Executive Officers of our General Partner;

•Section 16(a) Beneficial Ownership Reporting Compliance;

•Code of Ethics;

•Governance – Director Nominations; and

•Governance – Board Committees.

Item 11.Executive Compensation

The information regarding executive compensation required by Items 402 and 407(e)(4) and (e)(5) of Regulation S-K will be presented in our Proxy Statement under the following captions, which information is to be incorporated by reference herein:

•Compensation of Directors and Executive Officers;

•Governance – Compensation Committee – Interlocks and Insider Participation; and

•Compensation of Directors and Executive Officers – Compensation Committee Report.

Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information regarding securities authorized for issuance under equity compensation plans and security ownership required by Items 201(d) and 403 of Regulation S-K will be presented in our Proxy Statement under the following captions, which information is to be incorporated by reference herein:

•Securities Authorized for Issuance Under Equity Compensation Plans; and

•Security Ownership of Certain Beneficial Owners and Management.

Item 13.Certain Relationships and Related Transactions, and Director Independence

The information regarding certain relationships and related transactions and director independence required by Items 404 and 407(a) of Regulation S-K will be presented in our Proxy Statement under the following captions, which information is to be incorporated by reference herein:

•Transactions with Related Persons, Promoters and Certain Control Persons; and

•Governance – Director Independence.

Item 14.Principal Accountant Fees and Services

The information regarding principal accountant fees and services required by Item 9(e) of Schedule 14A of the Exchange Act will be presented in our Proxy Statement under the caption “Independent Auditor Proposal,” which information is to be incorporated by reference herein.

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PART IV

Item 15.    Exhibits and Financial Statement Schedules

(a)1 and (a)2.

	Page
Covered by reports of independent auditors:
Consolidated statements of income for the three years ended December 31, 2020	61
Consolidated statements of comprehensive income for the three years ended December 31, 2020	62
Consolidated balance sheets at December 31, 2019 and 2020	63
Consolidated statements of cash flows for the three years ended December 31, 2020	64
Consolidated statement of partners’ capital for the three years ended December 31, 2020	65
Notes 1 through 19 to consolidated financial statements	66
Not covered by reports of independent auditors:
Quarterly financial data (unaudited)	109

We have omitted all other required schedules since the required information is not present or is not present in amounts sufficient to require submission of the schedule, or because the information required is included in the financial statements and notes thereto.

(a)3, (b) and (c). The exhibits listed below on the Index to Exhibits are filed or incorporated by reference as part of this annual report.

112

Index to Exhibits

Exhibit No.	Description
Exhibit 3
*(a)	Certificate of Limited Partnership of Magellan Midstream Partners, L.P. dated August 30, 2000, as amended on November 15, 2002 and August 12, 2003 (filed as Exhibit 3.1 to Form 10-Q filed November 10, 2003).
*(b)	Fifth Amended and Restated Agreement of Limited Partnership of Magellan Midstream Partners, L.P. dated September 28, 2009 (filed as Exhibit 3.1 to Form 8-K filed September 30, 2009).
*(c)	Amendment No. 1 dated October 27, 2011 to Fifth Amended and Restated Agreement of Limited Partnership of Magellan Midstream Partners, L.P. dated September 28, 2009 (filed as Exhibit 3.1 to Form 8-K filed October 28, 2011).
*(d)	Amendment No. 2 dated January 16, 2017 to Fifth Amended and Restated Agreement of Limited Partnership of Magellan Midstream Partners, L.P. dated September 28, 2009 (filed as Exhibit 3.2 to Form 8-K filed January 17, 2017).
*(e)	Amendment No. 3 dated October 25, 2018 to Fifth Amended and Restated Agreement of Limited Partnership of Magellan Midstream Partners, L.P. dated September 28, 2009 (filed as Exhibit 3.1 to Form 8-K filed October 26, 2018).
*(f)	Amendment No. 4 dated September 25, 2020 to Fifth Amended and Restated Agreement of Limited Partnership of Magellan Midstream Partners, L.P. dated September 28, 2009 (filed as Exhibit 3.1 to Form 8-K filed September 25, 2020).
*(g)	Amended and Restated Certificate of Formation of Magellan GP, LLC dated November 15, 2002, as amended on August 12, 2003 (filed as Exhibit 3(f) to Form 10-K filed March 10, 2004).
*(h)	Third Amended and Restated Limited Liability Company Agreement of Magellan GP, LLC dated September 28, 2009 (filed as Exhibit 3.2 to Form 8-K filed September 30, 2009).
*(i)	Amendment No. 1 dated January 16, 2017 to Third Amended and Restated Limited Liability Company Agreement of Magellan GP, LLC dated September 28, 2009 (filed as Exhibit 3.1 to Form 8-K filed January 17, 2017).
Exhibit 4
*(a)	Indenture dated as of April 19, 2007 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.1 to Form 8-K filed April 20, 2007).
*(b)	First Supplemental Indenture dated as of April 19, 2007 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.2 to Form 8-K filed April 20, 2007).

*(c)	Indenture dated as of August 11, 2010 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.1 to Form 8-K filed August 16, 2010).
*(d)	Second Supplemental Indenture dated as of November 9, 2012 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.2 to Form 8-K filed November 9, 2012).
*(e)	Third Supplemental Indenture dated as of October 10, 2013 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.2 to Form 8-K filed October 10, 2013).
*(f)	Fourth Supplemental Indenture dated as of March 4, 2015 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.2 to Form 8-K filed March 4, 2015).
*(g)	Fifth Supplemental Indenture dated as of March 4, 2015 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.3 to Form 8-K filed March 4, 2015).
*(h)	Sixth Supplemental Indenture dated as of February 29, 2016 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.2 to Form 8-K filed February 29, 2016).
*(i)	Seventh Supplemental Indenture dated as of September 13, 2016 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.2 to Form 8-K filed September 13, 2016).
*(j)	Eighth Supplemental Indenture dated as of October 3, 2017 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.2 to Form 8-K filed October 3, 2017).
*(k)	Ninth Supplemental Indenture dated as of January 18, 2019 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.2 to Form 8-K filed January 18, 2019).
*(l)	Tenth Supplemental Indenture dated as of August 19, 2019 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.2 to Form 8-K filed August 19, 2019).
*(m)	Eleventh Supplemental Indenture dated as of May 20, 2020 between Magellan Midstream Partners, L.P. and U.S. Bank National Association, as trustee (filed as Exhibit 4.2 to Form 8-K filed May 20, 2020).
*(n)	Description of Securities (filed as Exhibit 4(o) to Form 10-K filed February 18, 2020).

113

Exhibit No.	Description
Exhibit 10
(a)	Amended and Restated Magellan Midstream Partners Long-Term Incentive Plan dated January 26, 2021.
(b)	Description of Magellan 2021 Annual Incentive Program.
(c)	Magellan GP, LLC Non-Management Director Compensation Program effective January 1, 2021.
*(d)	Amended and Restated Director Deferred Compensation Plan effective January 28, 2014 (filed as Exhibit 10(d) to Form 10-K filed February 24, 2014).
*(e)	$1,000,000,000 Second Amended and Restated Credit Agreement dated as of October 26, 2017 among Magellan Midstream Partners, L.P., the Lenders party thereto, Wells Fargo Bank, National Association, as Administrative Agent and an Issuing Bank, JPMorgan Chase Bank, N.A., as Co-Syndication Agent and an Issuing Bank, and SunTrust Bank, as Co-Syndication Agent and an Issuing Bank (filed as Exhibit 10.1 to Form 8-K filed October 27, 2017).
*(f)	First Amendment to Second Amended and Restated Credit Agreement dated as of May 17, 2019 among Magellan Midstream Partners, L.P., as borrower, Wells Fargo Bank, National Association, as administrative agent, and the lenders party thereto (filed as Exhibit 10.2 to Form 8-K filed May 22, 2019).
*(g)	Executive Severance Pay Plan dated July 21, 2011 (filed as Exhibit 10.2 to Form 10-Q filed August 4, 2011).
(h)	Form of 2021 Performance Based Phantom Unit Agreement for awards granted pursuant to the Magellan Midstream Partners Long-Term Incentive Plan.
(i)	Form of 2021 Retention Phantom Unit Agreement for awards granted pursuant to the Magellan Midstream Partners Long-Term Incentive Plan.
*(j)	Form of Commercial Paper Dealer Agreement between Magellan Midstream Partners, L.P., as Issuer, and the Dealer party thereto (filed as Exhibit 10.1 to Form 8-K filed April 22, 2014).
*(k)	Form of Indemnification Agreement by and among Magellan Midstream Partners, L.P., Magellan GP, LLC and the directors and officers of Magellan GP, LLC (filed as Exhibit 10.1 to Form 10-Q filed November 3, 2015).
Exhibit 14
*(a)	Code of Ethics dated February 1, 2011 by Michael N. Mears, principal executive officer (filed as Exhibit 14(a) to Form 10-K filed February 25, 2011).
*(b)	Code of Ethics dated May 1, 2019 by Jeff L. Holman, principal financial and accounting officer (filed as Exhibit 14(b) to Form 10-K filed February 18, 2020).
Exhibit 21	Subsidiaries of Magellan Midstream Partners, L.P.
Exhibit 23	Consent of Independent Registered Public Accounting Firm.
Exhibit 31
(a)	Certification of Michael N. Mears, principal executive officer.
(b)	Certification of Jeff Holman, principal financial officer.
Exhibit 32
(a)	Section 1350 Certification of Michael N. Mears, Chief Executive Officer.
(b)	Section 1350 Certification of Jeff Holman, Chief Financial Officer.
Exhibit 101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
Exhibit 101.SCH	XBRL Taxonomy Extension Schema.
Exhibit 101.CAL	XBRL Taxonomy Extension Calculation Linkbase.
Exhibit 101.DEF	XBRL Taxonomy Extension Definition Linkbase.
Exhibit 101.LAB	XBRL Taxonomy Extension Label Linkbase.
Exhibit 101.PRE	XBRL Taxonomy Extension Presentation Linkbase.

*    Each such exhibit has heretofore been filed with the Securities and Exchange Commission as part of the filing indicated and is incorporated herein by reference.

114

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

MAGELLAN MIDSTREAM PARTNERS, L.P. (Registrant)
By:	MAGELLAN GP, LLC, its general partner
By:	/s/  JEFF HOLMAN
	Jeff Holman Senior Vice President, Chief Financial Officer and Treasurer

Date: February 18, 2021

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacity and on the dates indicated.

115

Signature	Title	Date
/s/    MICHAEL N. MEARS	Chairman of the Board and Principal Executive Officer of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.	February 18, 2021
Michael N. Mears
/s/    JEFF HOLMAN	Principal Financial and Accounting Officer of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.	February 18, 2021
Jeff Holman
/s/    WALTER R. ARNHEIM	Director of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.	February 18, 2021
Walter R. Arnheim
/s/    ROBERT G. CROYLE	Director of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.	February 18, 2021
Robert G. Croyle
/s/    LORI A. GOBILLOT	Director of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.	February 18, 2021
Lori A. Gobillot
/s/    EDWARD J. GUAY	Director of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.	February 18, 2021
Edward J. Guay
/s/    CHANSOO JOUNG	Director of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.	February 18, 2021
Chansoo Joung
/s/    STACY P. METHVIN	Director of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.	February 18, 2021
Stacy P. Methvin
/s/    JAMES R. MONTAGUE	Director of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.	February 18, 2021
James R. Montague
/s/    BARRY R. PEARL	Director of Magellan GP, LLC, General Partner of Magellan Midstream Partners, L.P.	February 18, 2021
Barry R. Pearl

116

EX-10.A

Exhibit 10(a)

Magellan Midstream Partners

Long-Term Incentive Plan

Amended and Restated

January 26, 2021

Magellan Midstream Partners

Long-Term Incentive Plan

January 26, 2021

SECTION 1. Purpose of the Plan.

The Magellan Midstream Partners Long-Term Incentive Plan (the “Plan”) is intended to promote the interests of Magellan Midstream Partners, L.P., a Delaware limited partnership (the “Partnership”), by providing to directors of Magellan GP, LLC, a Delaware limited liability company (the “Company”) and the general partner of the Partnership, and employees of its Affiliates who perform services for the Partnership, incentive compensation awards for superior performance that are based on Units. The Plan is also contemplated to enhance the ability of the Company and its Affiliates to attract and retain the services of individuals who are essential for the growth and profitability of the Partnership and to encourage them to devote their best efforts to the business of the Partnership, thereby advancing the interests of the Partnership and its partners.

SECTION 2. Definitions.

As used in the Plan, the following terms shall have the meanings set forth below:

“Affiliate” means, with respect to any Person, any other Person that directly or indirectly through one or more intermediaries controls, is controlled by or is under common control with, the Person in question. As used herein, the term “control” means the possession, direct or indirect, of the power to direct or cause the direction of the management and policies of a Person, whether through ownership of voting securities, by contract or otherwise.

“Award” means a Phantom Unit or Performance Award granted under the Plan and shall include any tandem DERs granted with respect to a Phantom Unit.

“Award Agreement” means the written agreement by which an Award shall be evidenced.

“Board” means the Board of Directors of the Company.

“Committee” means the Compensation Committee of the Board or such other independent committee of the Board appointed by the Board to administer the Plan.

“DER” means a contingent right, granted in tandem with a specific Phantom Unit, to receive an amount in cash equal to the cash distributions made by the Partnership with respect to a Unit during the period such Phantom Unit is outstanding.

“Director” means a member of the Board who is not an Employee.

“Disability” shall have the meaning ascribed to such term in the Company’s governing long-term disability plan, or if no such plan is applicable to the Participant, as determined by the Committee.

“Employee” means any employee of the Company or an Affiliate who performs services for the Partnership, as determined by the Committee.

“Exchange Act” means the Securities Exchange Act of 1934, as amended.

“Fair Market Value” means the closing sales price of a Unit on the payment date (or if there is no trading in the Units on such date, on the next preceding date on which there was trading) as reported in The Wall Street Journal (or other reporting service approved by the Committee). In the event Units are not publicly traded at the time a

determination of fair market value is required to be made hereunder, the determination of fair market value shall be made in good faith by the Committee.

“Participant” means any Employee or Director granted an Award under the Plan.

“Partnership Agreement” means the Fifth Amended and Restated Agreement of Limited Partnership of Magellan Midstream Partners, L.P, as it may be amended or amended and restated from time to time.

“Performance Award” means a right, granted under Section 6(b) hereof, to receive Awards based upon performance criteria specified by the Committee.

“Person” means an individual, corporation, limited liability company, partnership, joint venture, trust, unincorporated organization, association, government agency or political subdivision thereof or other entity.

“Phantom Unit” means a phantom (notional) Unit granted under the Plan which upon vesting entitles the Participant to receive a Unit or an amount of cash equal to the Fair Market Value of a Unit, whichever is determined by the Committee.

“Restricted Period” means the period established by the Committee with respect to an Award during which the Award remains subject to forfeiture and is not payable to the Participant, which for a Phantom Unit Award is generally three years.

“Retirement” shall have the meaning ascribed to such term in the Company’s governing tax-qualified retirement plan, or if no such plan is applicable to the Participant, as determined by the Committee.

“Rule 16b-3” means Rule 16b-3 promulgated by the SEC under the Exchange Act, or any successor rule or regulation thereto as in effect from time to time.

“SEC” means the Securities and Exchange Commission, or any successor thereto.

“Unit” means a common unit of the Partnership.

SECTION 3. Administration.

The Plan shall be administered by the Committee. A majority of the Committee shall constitute a quorum, and the acts of the members of the Committee who are present at any meeting thereof at which a quorum is present, or acts unanimously approved by the members of the Committee in writing, shall be the acts of the Committee. Subject to the following and any applicable law, the Committee, in its sole discretion, may delegate any or all of its powers and duties under the Plan, including the power to grant Awards under the Plan, to the Chief Executive Officer of the Company, subject to such limitations on such delegated powers and duties as the Committee may impose, if any. Upon any such delegation all references in the Plan to the “Committee”, other than in Section 8, shall be deemed to include the Chief Executive Officer; provided, however, that such delegation shall not limit the Chief Executive Officer’s right to receive Awards under the Plan. Notwithstanding the foregoing, the Chief Executive Officer may not grant Awards to, or take any action with respect to any Award previously granted to, a person who is an officer subject to Rule 16b-3 or a Director. Subject to the terms of the Plan and applicable law, and in addition to other express powers and authorizations conferred on the Committee by the Plan, the Committee shall have full power and authority to: (i) designate Participants; (ii) determine the type or types of Awards to be granted to a Participant; (iii) determine the number of Units to be covered by Awards; (iv) determine the terms and conditions of any Award; (v) determine whether, to what extent and under what circumstances Awards may be settled, canceled or forfeited; (vi) interpret and administer the Plan and any instrument or agreement relating to an Award made under the Plan; (vii) establish, amend, suspend or waive such rules and regulations and appoint such agents as it shall deem appropriate for the proper administration of the Plan; and (viii) make any other determination and take any other action that the Committee deems necessary or desirable for the administration of the Plan. Unless otherwise expressly provided in the Plan, all designations, determinations, interpretations and other decisions under

or with respect to the Plan or any Award shall be within the sole discretion of the Committee, may be made at any time and shall be final, conclusive and binding upon all Persons, including the Company, the Partnership, any Affiliate, any Participant and any beneficiary of any Award.

SECTION 4. Units.

(a) Units Available. Subject to adjustment as provided in Section 4(c), the number of Units with respect to which Awards may be granted under the Plan is 13,700,000. If any Phantom Unit is forfeited or otherwise terminates or is canceled without the delivery of a Unit, then the Unit covered by such Award, to the extent of such forfeiture, termination or cancellation shall again be Units with respect to which an Award may be granted.

(b) Sources of Units Deliverable Under Awards. Any Units delivered pursuant to an Award shall consist, in whole or in part, of Units acquired in the open market, from any Affiliate, the Partnership or any other Person, or any combination of the foregoing.

(c) Adjustments. In the event that the Committee determines that any distribution (whether in the form of cash, Units, other securities, or other property), recapitalization, split, reverse split, reorganization, merger, consolidation, split-up, spin-off, combination, repurchase, or exchange of Units or other securities of the Partnership, issuance of warrants or other rights to purchase Units or other securities of the Partnership, or other similar transaction or event affects the Units such that an adjustment is determined by the Committee to be appropriate in order to prevent dilution or enlargement of the benefits or potential benefits intended to be made available under the Plan, then the Committee shall, in such manner as it may deem equitable, adjust any or all of (i) the number and type of Units (or other securities or property) with respect to which Awards may be granted and (ii) the number and type of Units (or other securities or property) subject to outstanding Awards or, if deemed appropriate, make provision for a cash payment to the holder of an outstanding Award; provided, that the number of Units subject to any Award shall always be a whole number.

SECTION 5. Eligibility.

Any Employee or Director shall be eligible to be designated a Participant and receive an Award under the Plan.

SECTION 6.Awards.

(a) Phantom Units. The Committee shall have the authority to determine the Employees and Directors to whom Phantom Units shall be granted, the number of Phantom Units to be granted to each such Participant, the Restricted Period, the conditions under which the Phantom Units may become vested or forfeited, which may include, without limitation, the accelerated vesting upon the achievement of specified performance goals, and such other terms and conditions as the Committee may establish with respect to such Awards, including whether DERs are granted with respect to such Phantom Units.

(i) DERs. To the extent provided by the Committee, in its discretion, a grant of Phantom Units may include a tandem DER grant, which may provide that such DERs shall be paid directly to the Participant, be credited to a bookkeeping account (with or without interest in the discretion of the Committee) subject to the same vesting restrictions as the tandem Award, or be subject to such other provisions or restrictions as determined by the Committee in its discretion.

(ii) Forfeiture. Except as otherwise provided in the terms of the Phantom Units grant, upon termination of a Participant’s employment with the Company and its Affiliates or membership on the Board, whichever is applicable, for any reason during the applicable Restricted Period, all Phantom Units shall be forfeited by the Participant. The Committee may, in its discretion, waive in whole or in part such forfeiture with respect to a Participant’s Phantom Units; provided, however, the Participant shall have no right to petition or request the Committee to review, or bring an appeal to the Committee regarding, the forfeiture.

(iii) Lapse of Restrictions. Upon or as soon as reasonably practical following the vesting of each Phantom Unit, subject to the provisions of Section 9(b), the Participant shall be entitled to receive from the Company one Unit or cash equal to the Fair Market Value of a Unit, as determined by the Committee in its discretion.

(b) Performance Awards. The Committee is authorized to grant Performance Awards to Participants on the following terms and conditions:

(i) Right to Payment. A Performance Award shall confer upon Participant rights, valued as determined by the Committee, and payable to the Participant to whom the Performance Award is granted, in whole or in part, as the Committee shall establish at grant or thereafter. The performance criteria and all other terms and conditions of the Performance Award shall be determined by the Committee upon the grant of each Performance Award or thereafter.

(ii) Other Terms. A Performance Award may be denominated or payable in cash, deferred cash, Units, other Awards or other property, and other terms of Performance Awards shall be as determined by the Committee.

(c) General.

(i) Awards May Be Granted Separately or Together. Awards may, in the discretion of the Committee, be granted either alone or in addition to, in tandem with, or in substitution for any other Award granted under the Plan or any award granted under any other plan of the Company or any Affiliate. Awards granted in addition to or in tandem with other Awards or awards granted under any other plan of the Company or any Affiliate may be granted either at the same time as or at a different time from the grant of such other Awards or awards.

(ii) Compliance With Section 409A. Each Award under this Plan is intended either (i) to qualify as “short term deferral” as such phrase is used in Section 409A of the Internal Revenue Code of 1986 or (ii) to comply with the requirements of Section 409A. In that regard, notwithstanding anything in any Award to the contrary, in no event shall payment of or under an Award be made later than 2-1/2 months following the year in which such payment ceases to be subject to substantial risk of forfeiture for purposes of Section 409A.

(iii) Limits on Transfer of Awards. No Award and no right under any such Award may be assigned, alienated, pledged, attached, sold or otherwise transferred or encumbered by a Participant and any such purported assignment, alienation, pledge, attachment, sale, transfer or encumbrance shall be void and unenforceable against the Company or any Affiliate; provided, however, that Awards may be transferred by will and the laws of descent and distribution.

(iv) Term of Awards. The term of each Award shall be for such period as may be determined by the Committee.

(v) Unit Certificates. All certificates for Units or other securities of the Partnership delivered under the Plan pursuant to any Award shall be subject to such stop transfer orders and other restrictions as the Committee may deem advisable under the Plan or the rules, regulations and other requirements of the SEC, any stock exchange upon which such Units or other securities are then listed, and any applicable federal or state laws, and the Committee may cause a legend or legends to be put on any such certificates to make appropriate reference to such restrictions.

(vi) Consideration for Grants. Awards may be granted for such consideration, including services, as the Committee determines.

(vii) Delivery of Units or other Securities. Notwithstanding anything in the Plan or any grant agreement to the contrary, delivery of Units pursuant to vesting of an Award may be deferred for any period during which, in the good faith determination of the Committee, the Company is not reasonably able to obtain Units to deliver pursuant to such Award without violating the rules or regulations of any applicable law or securities exchange. Such payment may be made by such method or methods and in such form or forms as the Committee shall determine.

(viii) Minimum Vesting Provision. Awards (other than cash‑settled Awards) made to Employees or Directors shall not be scheduled to vest earlier than the date that is one year following the date the Award is granted by the Committee; provided, however, that, notwithstanding the foregoing, Awards that result in the issuance of an aggregate of up to 5% of the Units available pursuant to Section 4(a) may be granted to any one or more Employees or Directors without respect to such minimum vesting provision.

SECTION 7. Change in Control.

(a) Change in Control. A “Change in Control” shall be deemed to have occurred upon the occurrence of one or more of the following events: (i) any direct or indirect sale, lease, exchange, liquidation, division or other transfer (in one transaction or a series of related transactions) of all or substantially all of the assets of the Partnership to any person or persons, other than to one or more Affiliates; (ii) the consolidation, reorganization, merger, recapitalization, exchange, division or other similar transaction (in one transaction or a series of related transactions) (any such transaction or series of transactions referred to herein as a “Merger”) pursuant to which (a) more than 50% of the combined voting power of the outstanding equity interests in the Company or its successor entities cease to be owned, directly or indirectly, by the Partnership, (b) more than 50% of the combined voting power of the outstanding equity interests in the Partnership or its successor entities cease to be, directly or indirectly, owned immediately following the Merger by the owners of such interests immediately prior to the Merger, or (c) the Company or one or more other Affiliates of the Partnership cease to be general partner(s) of the Partnership or its successor; (iii) a person or group other than the Partnership or its consolidated subsidiaries directly or indirectly becoming the “beneficial owner” (as defined in Rules 13d-3 and 13d-5 under the Exchange Act) of more than 30% of the voting power of the then outstanding common units of the Partnership or its successor; or (iv) individuals who, as of the date hereof, constitute the Board (the “Incumbent Board”) cease for any reason to constitute at least a majority of the Board or of the board of directors or equivalent body of any successor parent of the Partnership or of the Company; provided, however, that any individual becoming a director subsequent to the date hereof whose election or nomination for election by the Partnership’s unitholders was approved by a vote of at least a majority of the directors then comprising the Incumbent Board in the ordinary course of business shall be considered as though such individual was a member of the Incumbent Board, but excluding, for this purpose, any such individual whose initial assumption of office occurs as a result of an actual or threatened election contest with respect to the election or removal of directors or other actual or threatened solicitation of proxies or consents by or on behalf of a Person other than the Board or otherwise outside the ordinary course of business. A Change in Control shall not be deemed to have occurred as a result of a transaction or series of transactions undertaken solely for the purpose of converting the Partnership from a limited partnership to a c-corporation or limited liability company.

(b) Payout of Awards after Change in Control. If, within two (2) years following a Change in Control, a Participant has a Termination of Affiliation (excluding any transfer to an Affiliate of the Company) voluntarily by the Participant for Good Reason or involuntarily by the Company, the Partnership or an Affiliate thereof (other than due to Cause), Awards granted prior to a Change in Control, shall automatically vest and become payable, in full, and all Restricted Periods shall terminate and all performance criteria, if any, shall be deemed to have been achieved at the maximum level with respect to such Awards. Any payout owed to the Participant pursuant to this section shall be settled in cash.

(c) Notification of Good Reason Event. If, within two (2) years following a Change in Control, a Good Reason Event occurs, the Participant shall provide written notice to the Company not later than 90 days after the occurrence of the Good Reason Event setting forth in reasonable detail the circumstances that constitute the Good Reason Event and tendering his or her resignation for Good Reason. If the Participant does not provide notice as set forth above, the Participant shall not have the right to resign for Good Reason based on any Good Reason Event

occurring more than 90 days before a notice is given. Upon receipt of the Participant’s written notice, the Company shall have 30 days to remedy the Good Reason Event or to notify the Participant of its intent to not remedy the Good Reason Event. If the Company remedies the Good Reason Event within such 30 day period, the Participant’s resignation for Good Reason shall be rescinded and the Company shall have no obligation to pay the amount due pursuant to this section. If the Company (i) does not cure the Good Reason Event within such 30 day period or (ii) provides notice to the Participant of its intent to not remedy the Good Reason Event, the Participant’s resignation shall be effective immediately, and the Company shall be obligated to make payment to the Participant as provided herein.

(d) Definitions. For purposes of this Section 7 only, the following terms shall have the meanings set forth below:

(i) “Cause” means, unless otherwise defined in an Award Agreement, the occurrence of any one or more of the following, as determined in the good faith and reasonable judgment of the Committee: (i) willful failure by a Participant to substantially perform his or her duties (as they existed immediately prior to a Change of Control), other than any such failure resulting from a Disability, or (ii) gross negligence or willful misconduct of the Participant which results in a significantly adverse effect upon the Company, the Partnership, or an Affiliate thereof, or (iii) willful violation or disregard of the code of business conduct or other published policy of the Company, the Partnership, or an Affiliate thereof by the Participant, or (iv) Participant’s conviction of a crime involving an act of fraud, embezzlement, theft, or any other act constituting a felony or causing material harm, financial or otherwise, to the Company, the Partnership, or an Affiliate thereof.

(ii) “Termination of Affiliation” occurs on the first day on which an individual is for any reason no longer providing services to the Company, the Partnership, or an Affiliate thereof.

(iii) “Good Reason” or “Good Reason Event” means, unless otherwise defined in an Award Agreement, the occurrence, within two years following a Change of Control and without a Participant’s prior written consent, of any one or more of the following:

(1) a material change in the Participant’s duties from those assigned to the Participant immediately prior to a Change of Control, unless associated with a bona fide promotion of the Participant and a commensurate increase in the Participant’s compensation, in which case the Participant shall be deemed to consent;

(2) a significant reduction in the authority and responsibility assigned to the Participant;

(3) the removal of the Participant from, or failure to reelect the Participant to, any corporate or similar office of the Company, the Partnership, or an Affiliate thereof to which the Participant may have been elected and was occupying immediately prior to a Change of Control, unless associated with a bona fide promotion of the Participant and a commensurate increase in the Participant’s compensation or in connection with the election or appointment of the Participant to a corresponding or higher office of the Company or any Affiliate, in each which case the Participant shall be deemed to consent;

(4) a reduction of more than 10% of a Participant’s base salary;

(5) termination of any of the incentive compensation plans of the Partnership or the Company in which the Participant shall be participating at the time of a Change of Control, unless such plan is replaced by a successor plan providing incentive opportunities and awards at least as favorable to the Participant as those provided in the plan being terminated;

(6) amendment of any of the incentive compensation plans of the Partnership or the Company in which the Participant shall be participating at the time of a Change of Control so as to

provide for incentive opportunities and awards less favorable to the Participant than those provided in the plan being amended;

(7) failure by the Company, the Partnership, or an Affiliate thereof to continue the Participant as a participant in any of the Company’s or Partnership’s incentive compensation plans in which the Participant is participating immediately prior to a Change of Control on a basis comparable to the basis on which other similarly situated employees participate in such plan;

(8) except in relation to a wage freeze applicable to all employees of the Company, the Partnership, or an Affiliate thereof, modification of the administration of any of the incentive compensation plans so as to adversely affect the level of incentive opportunities or awards actually received by the Participant;

(9) a requirement by the Company, the Partnership, or an Affiliate thereof that the Participant’s principal duties be performed at a location more than fifty (50) miles from the location where the Participant was employed immediately preceding the Change of Control, except for travel reasonably required in the performance of the Participant’s duties;

(10) a signification reduction in the authority, duties or responsibilities of the supervisor to whom the Participant reports, including a requirement that the Participant report to an officer of the Company or employee instead of reporting directly to the board of directors of the Company;

(11) a significant reduction in the budget over which the Participant retains authority; or

(12) any other action or inaction that constitutes a material breach by the Partnership, Company or Affiliate of an agreement, if any, under which the Participant provides services.

SECTION 8. Amendment and Termination.

Except to the extent prohibited by applicable law:

(a) Amendments to the Plan. Except as required by the rules of the principal securities exchange on which the Units are traded and subject to Section 8(b) below, the Board or the Committee may amend, alter, suspend, discontinue or terminate the Plan in any manner, including increasing the number of Units available for Awards under the Plan, without the consent of any partner, Participant, other holder or beneficiary of an Award or other Person.

(b) Amendments to Awards. Subject to Section 8(a), the Committee may waive any conditions or rights under, amend any terms of, or alter any Award theretofore granted, provided (i) the Committee may not reprice the Awards and (ii) no change, other than pursuant to Section 7(c), in any Award shall materially reduce the benefit to Participant without the consent of such Participant.

(c) Adjustment of Awards Upon the Occurrence of Certain Unusual or Nonrecurring Events. Subject to Section 8(b), the Committee is hereby authorized to make adjustments in the terms and conditions of, and the criteria included in, Awards in recognition of unusual or nonrecurring events (including, without limitation, the events described in Section 4(c) of the Plan) affecting the Partnership or the financial statements of the Partnership, or of changes in applicable laws, regulations or accounting principles, whenever the Committee determines that such adjustments are appropriate in order to prevent dilution or enlargement of the benefits or potential benefits intended to be made available under the Plan.

SECTION 9.General Provisions.

(a) No Rights to Award. No Person shall have any claim to be granted any Award under the Plan, and there is no obligation for uniformity of treatment of Participants. The terms and conditions of Awards need not be the same with respect to each recipient.

(b) Withholding. The Company or any Affiliate is authorized to withhold from any Award, from any payment due or transfer made under any Award or from any compensation or other amount owing to a Participant the amount (in cash, Units, other securities, Units that would otherwise be issued pursuant to such Award or other property) of any applicable taxes payable in respect of the grant of an Award, the lapse of restrictions thereon, or any payment or transfer under an Award or under the Plan and to take such other action as may be necessary in the opinion of the Company to satisfy its withholding obligations for the payment of such taxes. In no event shall the withholding for taxes exceed that which is necessary to satisfy the employer’s maximum withholding requirements for the applicable jurisdiction (or such other rate as may be determined by the Company after considering any accounting consequences or costs). Units withheld or tendered for the payment of taxes shall not again be Units with respect to which Awards may be granted.

(c) No Right to Employment. The grant of an Award shall not be construed as giving a Participant the right to be retained in the employ of the Company or any Affiliate or to remain on the Board, as applicable. Further, the Company or an Affiliate may at any time dismiss a Participant from employment, free from any liability or any claim under the Plan, unless otherwise expressly provided in the Plan or in any Award agreement.

(d) Governing Law. The validity, construction, and effect of the Plan and any rules and regulations relating to the Plan shall be determined in accordance with the laws of the State of Delaware law without regard to its conflict of laws principles.

(e) Severability. If any provision of the Plan or any award is or becomes or is deemed to be invalid, illegal or unenforceable in any jurisdiction or as to any Person or Award, or would disqualify the Plan or any award under any law deemed applicable by the Committee, such provision shall be construed or deemed amended to conform to the applicable laws, or if it cannot be construed or deemed amended without, in the determination of the Committee, materially altering the intent of the Plan or the Award, such provision shall be stricken as to such jurisdiction, person or award and the remainder of the Plan and any such Award shall remain in full force and effect.

(f) Other Laws. The Committee may refuse to issue or transfer any Units or other consideration under an Award if, in its sole discretion, it determines that the issuance or transfer or such Units or such other consideration might violate any applicable law or regulation, the rules of the principal securities exchange on which the Units are then traded or entitle the Partnership or an Affiliate to recover the same under Section 16(b) of the Exchange Act.

(g) No Trust or Fund Created. Neither the Plan nor any award shall create or be construed to create a trust or separate fund of any kind or a fiduciary relationship between the Company or any participating Affiliate and a Participant or any other Person. To the extent that any Person acquires a right to receive payments from the Company or any participating Affiliate pursuant to an award, such right shall be no greater than the right of any general unsecured creditor of the Company or any participating Affiliate.

(h) No Fractional Units. No fractional Units shall be issued or delivered pursuant to the Plan or any Award, and the Committee shall determine whether cash, other securities or other property shall be paid or transferred in lieu of any fractional Units or whether such fractional Units or any rights thereto shall be canceled, terminated or otherwise eliminated.

(i) Headings. Headings are given to the Sections and subsections of the Plan solely as a convenience to facilitate reference. Such headings shall not be deemed in any way material or relevant to the construction or interpretation of the Plan or any provision thereof.

(j) Facility Payment. Any amounts payable hereunder to any person under legal disability or who, in the judgment of the Committee, is unable to properly manage his financial affairs, may be paid to the legal representative of such person, or may be applied for the benefit of such person in any manner which the Committee may select, and the Company shall be relieved of any further liability for payment of such amounts.

(k) Gender and Number. Words in the masculine gender shall include the feminine gender, the plural shall include the singular and the singular shall include the plural.

SECTION 10. Term of the Plan.

The Plan shall be effective on the date of its approval by the Board or the Committee and, unless earlier terminated by the Board or the Committee, shall continue until the tenth anniversary of the earlier of (i) the date the Board or Committee adopted the Plan or (ii) the date the Partnership’s unitholders approved the Plan. However, unless otherwise expressly provided in the Plan or in an applicable Award Agreement, any Award granted prior to such termination, and the authority of the Board or the Committee to amend, alter, adjust, suspend, discontinue or terminate any such Award or to waive any conditions or rights under such Award, shall extend beyond such termination date.

EX-10.B

Exhibit 10(b)

2021 Annual Incentive Program Summary

Magellan's 2021 Annual Incentive Program (“AIP”) is a discretionary bonus program to encourage individual activities that will improve the overall financial and operational performance of Magellan Midstream Partners, L.P. (“Magellan”). The 2021 AIP payout will be based on a combination of Magellan's performance and individual performance as determined by results achieved in the 2021 calendar year.

A “Funding Metric” has been established that sets a floor of performance for Magellan below which no payout for any metric will be made. An “Overriding Financial Trigger” has been set to allow for the results of the overall financial performance of Magellan to override the individual financial metrics set for Magellan. It is intended to address a possible condition where, even though one of the financial metrics is down, Magellan's overall financial performance is extremely strong. The AIP has financial metrics that are used to measure profitability as well as metrics for environmental, safety and culture performance. Goals for levels of achievement have been set for each metric. Payouts under the AIP begin after the threshold level of performance is achieved and the maximum payout occurs if results reach the stretch targets.

If target performance is achieved, 100% of the calculated payout is eligible to be paid under the AIP. If stretch performance is achieved, 200% of the calculated payout is eligible to be paid. If threshold is achieved, 50% of the calculated payout is eligible to be paid. If the results are lower than threshold, 0% of the calculated payout is eligible to be paid. The calculated payout percentage for performance between threshold and target, or between target and stretch, will be interpolated. Fifty percent (50%) of the eligible payout is subject to a personal performance adjustment.

Employees are eligible for the 2021 AIP if a regular full-time or part-time employee with a standard hour classification of 20 or more hours per week, including employees on military leave. Ineligible employees include, but are not limited to, employees on leave without pay, limited scope employees, contract employees, those whose employment ended prior to the award payout and employees with zero eligible earnings in the calendar year.

To be eligible to receive a payout, an employee must be employed during the calendar year including the last day of the calendar year and through the time the award is actually paid. Exceptions to this requirement will be made where a participant's employment is terminated as a result of retirement, death or the participant becomes eligible for long-term disability. Such employees will be eligible for a prorated award based on the portion of the year worked prior to the employment termination or disability event. A participant, whose employment is terminated anytime between the end of the calendar year, but prior to the distribution of the payout under any other circumstances, will forfeit any award payable under the AIP. Forfeited awards will be allocated to all other eligible employees.

Eligible earnings include an employee's regular base pay and eligible overtime pay for the period in which the employee is a participant in the AIP, including, but not limited to, hours worked during a normal workday, Paid Time Off (PTO), short term disability, holiday pay, jury duty pay, bereavement pay and shift differentials, but excludes extraordinary compensation such as geographical differentials. Eligible earnings will exclude any unused PTO paid out after the employment retirement, termination or disability event.

After the eligible payout is determined based on Magellan's metric results, an adjustment may be made based on the employee's individual performance. This adjustment, if applied, would adjust 50% of an employee's eligible incentive payout based on management's assessment of the employee's performance on individual goals and the employee's performance of job responsibilities. This adjustment can range from 0% to 200% of the 50% amount that is subject to the personal performance adjustment.

1

2021 Annual Incentive Program Metrics

FUNDING METRIC

MetricThreshold

Distributable Cash Flow Funding occurs at greater than or equal to $917 million

The threshold funding metric is based upon the amount of distributable cash flow required for Magellan to maintain its 2020 fourth quarter distribution rate to unitholders throughout 2021.

OVERRIDING FINANCIAL TRIGGER

MetricTrigger

EBITDA less Maintenance Capital (including commodities) The combined financial metrics will be reset to the greater of actual metric results or a Target level payout at results of $1,318 million or more.

PERFORMANCE GOALS

($ in Millions)

Metrics	Weight	Threshold	Target	Stretch
EBITDA less Maintenance Capital (1) (2)	65%	$1,054	$1,133	$1,193
Commodities (1)(3)	10%	$75	$100	$125
Environmental, Safety & Culture Performance	25%	Discretionary	Discretionary	Discretionary

________________

(1) The overriding financial trigger will change the payout to at least a target level payout for the financial metrics when overall financial results have exceeded the trigger. The combined financial metrics will be reset to the greater of actual metric results or Target Level payouts when Magellan’s EBITDA less Maintenance Capital (including commodities) is $1,318 million or more

(2) EBITDA less Maintenance Capital includes any margin earned from buy/sell transactions completed on the Longhorn or BridgeTex pipelines but excludes all other commodity-related activity.

(3) Commodities exclude any margin earned from buy/sell transactions completed on the Longhorn or BridgeTex pipelines.

METRIC ADJUSTMENTS

If an acquisition occurs during the year, the financial metrics may be adjusted to reflect the impact of the transaction. The Environmental, Safety & Culture Performance actual results may exclude acquisitions until the new locations have a full calendar year to become compliant with Magellan’s System Integrity Plan policies and procedures.

2

EX-10.C

Exhibit 10(c)

Magellan GP, LLC

Non-Management Director

Compensation Program

Effective January 1, 2021

	Compensation	Timing of Payment(1)
Annual Board Retainer:(2)     Cash     Common Units	$80,000 $130,000(3)	Paid quarterly as of January 1st, April 1st, July 1st and October 1st As of January 1st
Annual Chairman Retainer:(2)     Audit Committee     Compensation Committee     Conflicts Committee Nominating and Governance Committee Lead Director	$20,000 $15,000 $10,000 $15,000 $20,000	Paid quarterly as of January 1st, April 1st, July 1st and October 1st
Meeting Fees:     Board Meeting Fees     Committee Meeting Fees	$1,500 per meeting $1,500 per meeting	Paid quarterly as of January 1st, April 1st, July 1st and October 1st

(1)For newly elected directors or a newly appointed committee chairman, the annual board retainer and annual chairman retainer, if applicable, are payable pro-rata for the year of election.

(2)Directors who resign from the board or relinquish their role of committee chairman after a payment date has occurred, but prior to the payment having been received, will receive a pro-rata annual board retainer and annual chairman retainer for the period of time between the payment date and the resignation/relinquishment.

(3)The number of common units to be issued for the annual board retainer will be determined based on the closing price on the first business day immediately following the January 1st payment date.

EX-10.H

Exhibit 10(h)

PERFORMANCE BASED PHANTOM UNIT AGREEMENT

THIS PERFORMANCE BASED PHANTOM UNIT AGREEMENT (this “Agreement”) is by and between Magellan GP, LLC (the “Company”) and [PARTICIPANT NAME] (the “Participant”).

1.Grant of Phantom Units. The Company hereby grants to the Participant effective February 5, 2021 (the “Effective Date”), subject to the terms and conditions of the Magellan Midstream Partners Long-Term Incentive Plan, as amended and restated (the “Plan”), and this Agreement, the right to be eligible to receive a grant of [_______] phantom units, with tandem distribution equivalent rights (“DERs”), of Magellan Midstream Partners, L.P. (the “Partnership”). These Units, including the tandem DERs, are referred to in this Agreement as “Phantom Units” during the Restricted Period (as defined in Section 4) and “Units” after the Restricted Period. The number of Units received at the end of the Restricted Period will be determined based on performance criteria, employment status at that time and any other relevant provisions of the Plan and this Agreement. Until the Phantom Units vest and are paid, the Participant shall have no rights as a unitholder of the Partnership with respect to the Phantom Units.

2.Incorporation of Plan. The Plan is incorporated herein by reference, and all capitalized terms used herein, but not defined herein, shall have the meanings set forth in the Plan. The Participant acknowledges receipt of a copy of the Plan and hereby accepts the Phantom Units subject to all the terms and provisions of the Plan and this Agreement.

3.Compensation Committee of the Board - Decisions and Interpretations. The Participant agrees to accept as binding, conclusive and final all decisions and interpretations of the Compensation Committee of the Board (the “Committee”) of the Company with respect to any questions arising under the Plan and this Agreement. Participants shall have no right to petition or request the Committee to review, or bring an appeal to the Committee regarding, any decisions or interpretations of the Committee hereunder.

4.Restricted Period of Phantom Units. The Restricted Period begins on the Effective Date and ends on the first of the following events to occur:

a.December 31, 2023; or

b. Your Termination of Affiliation (excluding any transfer to an Affiliate of the Company) with the Company, voluntarily for Good Reason, or involuntarily (other than due to Cause) within two years following a Change of Control as set forth in the Plan.

5.Payment of Phantom Units and DERs.

a. Eligibility. To be eligible to receive a payout of the Phantom Units at the end of the Restricted Period, the Participant must be employed by the Company or its Affiliates at the end of the Restricted Period, or must have terminated employment during the Restricted Period due to Retirement, death or Disability.

b. Determination of Payout Amount. The final determination of the payout level of the Phantom Units will be based upon the performance metric outlined in Paragraph 7 and additional conditions outlined in Paragraph 8.

c. DERs. At the end of the Restricted Period, the Company will pay to the Participant, or the Participant’s legal representative, the value of the DERs on the gross number of Units awarded to the Participant pursuant to the terms of this Agreement. The value of the DERs shall be the amount of all distributions per Unit that would have been earned and paid during the Restricted Period on the gross number of Units awarded, and no interest shall be paid on such amount. Such payment of the DERs shall be in cash and subject to tax withholding requirements.

d. Timing of Payout. Subject to legal or contractual obligations, the Company will deliver to the Participant, or the Participant’s legal representative, as soon as practicable after the final determination of payout levels by the Committee, a number of Units equal in value to the number of Phantom Units calculated pursuant to Paragraphs 7 and 8, less the number of Units required to cover tax withholding requirements.

6. Termination of Employment Due to Retirement, Death or Disability. In the event a Participant’s employment with the Company or its Affiliates terminates prior to the end of the Restricted Period due to Retirement, death or Disability, the initial target grant of Phantom Units will be prorated based upon the Participant’s months of employment between January 1, 2021 and December 31, 2023. Such prorated amount will continue to be restricted and subject to the terms of this Agreement until the Restricted Period ends as provided in Section 4.a above. All Phantom Units in excess of the prorated amount shall be forfeited.

7. Performance Metric.

	Payout Schedule
	Threshold 50% Payout Level	Target 100% Payout Level	Stretch 200% Payout Level
2023 Distributable Cash Flow (“DCF”) per Unit	$X.XX	$X.XX	$X.XX
(including any margin earned from buy/sell transactions completed on the Longhorn or BridgeTex pipelines, but excluding all other commodity-related activity)

8. Determination of Payout Level. The number of Units to be paid to the Participant will be determined based on performance relative to the performance metric payout schedule in Paragraph 7. No payout will occur for results below the 50% payout level. The payout for results achieved between each payout level will be interpolated.

9. Other Provisions.

a.The Participant understands and agrees that payments under this Agreement shall not be used for, or in the determination of, any other payment or benefit under any continuing agreement, plan, policy, practice or arrangement providing for the making of any payment or the provision of any benefits to or for the Participant or the Participant’s beneficiaries or representatives, including, without limitation, any employment agreement, any change of control severance protection plan or any employee benefit plan as defined in Section 3(3) of ERISA, including, but not limited to qualified and non-qualified retirement plans.

b. Except as otherwise provided herein and in the Plan, in the event that the Participant’s employment with the Company or its Affiliates, or its or their successors, terminates prior to the vesting of the Phantom Units granted under this Agreement, such Phantom Units shall be forfeited.

c. By signing this Agreement, the Participant represents and agrees that he or she will keep the terms, amount and fact of this Agreement completely confidential, and that, unless required to do so by law, he or she will not hereafter disclose any information concerning this Agreement to anyone including, but not limited to, any past, present or prospective employee or applicant for employment of the Company or its Affiliates and any past, present or prospective customer of the Company, the Partnership or their Affiliates.

d. Neither the Phantom Units, nor the Participant’s interest in the Phantom Units, may be sold, assigned, transferred, pledged, hedged or otherwise disposed of or encumbered at any time prior to the vesting and payment of such Phantom Units under this Agreement.

e. If the Participant at any time forfeits any or all of the Phantom Units pursuant to this Agreement, the Participant agrees that all of the Participant’s rights to and interest in the Phantom Units shall terminate upon forfeiture without payment of consideration.

f. With respect to the right to receive payment of the Phantom Units under this Agreement, nothing contained herein shall give the Participant any rights that are greater than those of a general creditor of the Company.

10. Notices. All notices to the Company required hereunder shall be in writing and delivered by hand or by mail, addressed to Magellan GP, LLC, One Williams Center, Mail Drop 32, Tulsa, Oklahoma 74172, Attention: Compensation Department. Notices shall become effective upon their receipt by the Company if delivered in the forgoing manner.

Magellan GP, LLC

By:                                                         Michael N. Mears

President and Chief Executive Officer

of Magellan GP, LLC

Dated: February 5, 2021

EX-10.I

Exhibit 10(i)

RETENTION PHANTOM UNIT AGREEMENT

THIS RETENTION PHANTOM UNIT AGREEMENT (this “Agreement”) is by and between Magellan GP, LLC (the “Company”) and [PARTICIPANT NAME] (the “Participant”).

1.Grant of Phantom Units. The Company hereby grants to the Participant effective February 5, 2021(the “Effective Date”), subject to the terms and conditions of the Magellan Midstream Partners Long-Term Incentive Plan, as amended and restated (the “Plan”), and this Agreement, the right to be eligible to receive a grant of [______]phantom units, with tandem distribution equivalent rights (“DERs”), of Magellan Midstream Partners, L.P. (the “Partnership”). These phantom units, including the tandem DERs, are referred to in this Agreement as “Phantom Units” during the Restricted Period (as defined in Section 4) and “Units” after the Restricted Period. Until the Phantom Units vest and are paid, the Participant shall have no rights as a unitholder of the Partnership with respect to the Phantom Units.

2.Incorporation of Plan. The Plan is hereby incorporated herein by reference, and all capitalized terms used herein, but not defined herein, shall have the meanings set forth in the Plan. The Participant acknowledges receipt of a copy of the Plan and hereby accepts the Phantom Units subject to all the terms and provisions of the Plan and this Agreement.

3.Compensation Committee of the Board - Decisions and Interpretations. The Participant agrees to accept as binding, conclusive and final all decisions and interpretations of the Compensation Committee of the Board (the “Committee”) of the Company with respect to any questions arising under the Plan and this Agreement. Participants shall have no right to petition or request the Committee to review, or bring an appeal to the Committee regarding, any decisions or interpretations of the Committee hereunder.

4.Restricted Period of Phantom Units. The Restricted Period begins on the Effective Date and ends on the first of the following events to occur:

a.December 31, 2023; or

b.Your Termination of Affiliation (excluding any transfer to an Affiliate of the Company) with the Company, voluntarily for Good Reason or involuntarily (other than due to Cause), within two years following a Change of Control as set forth in the Plan.

5. Eligibility to Receive Units. The Participant will be eligible to receive a payout of the Phantom Units hereunder only if the Participant has been employed by the Company or its Affiliates, or its or their successors, continuously throughout the Restricted Period and continues to be so employed on the last day of the Restricted Period, unless the Participant terminates employment during the Restricted Period due to Retirement, death or Disability, in which case, the Phantom Units will vest as provided in Section 7 below.

6. Payment of Units and DERs. Subject to legal or contractual obligations and Participant’s eligibility to receive a payout of the Phantom Units as set forth in Section 5, the Company will deliver to the Participant, or the Participant’s legal representative, as soon as practicable after the Restricted Period, a number of Units equal to the number of vested Phantom Units net of any Units used to satisfy all or part of tax withholding requirements. The number of Units required to cover tax withholding requirements will be based on the closing price of the Units on the last business day of the Restricted Period. In addition, as soon as practicable after the end of the Restricted Period, the Company will pay to the Participant, or the Participant’s legal representative, the value of the DERs on the gross number of Units awarded to the Participant pursuant to the terms of this Agreement. The value of the DERs shall be the amount of all distributions per Unit that would have been earned and paid during the Restricted Period on the gross number of Units awarded, and no interest shall be paid on such amount. Such payment of the DERs shall be in cash and subject to tax withholding requirements.

7. Termination of Employment Due to Retirement, Death or Disability. In the event a Participant’s employment with the Company or its Affiliates terminates prior to the end of the Restricted Period due to Retirement, death or Disability and on the date of such termination due to Retirement, death or Disability the Participant would have met the eligibility requirements of Section 5, the initial target grant of Phantom Units will be prorated based upon the Participant’s months of employment between January 1, 2021 and December 31, 2023. Such prorated amount will continue to be restricted and subject to the terms of this Agreement until the Restricted Period ends. All Phantom Units in excess of the prorated amount shall be forfeited.

8. Other Provisions.

a.The Participant understands and agrees that payments under this Agreement shall not be used for, or in the determination of, any other payment or benefit under any continuing agreement, plan, policy, practice or arrangement providing for the making of any payment or the provision of any benefits to or for the Participant

or to the Participant’s beneficiaries or representatives, including, without limitation, any employment agreement, any change of control severance protection plan or any employee benefit plan as defined in Section 3(3) of ERISA, including, but not limited to qualified and non-qualified retirement plans.

b.Except as otherwise provided herein, in the event that the Participant’s employment with the Company or its Affiliates, or its or their successors, terminates for any reason prior to the end of the Restricted Period, such Phantom Units shall be forfeited.

c.By signing this Agreement, the Participant represents and agrees that he or she will keep the terms, amount and fact of this Agreement completely confidential, and that, unless required to do so by law, he or she will not hereafter disclose any information concerning this Agreement to anyone including, but not limited to, any past, present or prospective employee or applicant for employment of the Company or its Affiliates and any past, present or prospective customer of the Company, the Partnership or their Affiliates.

d.Neither the Phantom Units, nor the Participant’s interest in the Phantom Units, may be sold, assigned, transferred, pledged, hedged or otherwise disposed of or encumbered at any time prior to the vesting and payment of such Phantom Units under this Agreement.

e.If the Participant at any time forfeits any or all of the Phantom Units pursuant to this Agreement, the Participant agrees that all of the Participant’s rights to and interest in the forfeited Phantom Units, including the tandem DERs, shall terminate upon forfeiture without payment of consideration.

f.With respect to the right to receive payment of the Phantom Units under this Agreement, nothing contained herein shall give the Participant any rights that are greater than those of a general creditor of the Company.

9. Notices. All notices to the Company required hereunder shall be in writing and delivered by hand or by mail, addressed to Magellan GP, LLC, One Williams Center, Mail Drop 32, Tulsa, Oklahoma 74172, Attention: Compensation Department. Notices shall become effective upon their receipt by the Company if delivered in the forgoing manner.

Magellan GP, LLC

By: __________________________

Michael N. Mears

President and Chief Executive Officer

of Magellan GP, LLC

                    Dated: February 5, 2021

EX-21

EXHIBIT 21

LIST OF SUBSIDIARIES AS OF DECEMBER 31, 2020

Magellan Midstream Partners, L.P., a Delaware limited partnership and the Registrant

Magellan GP, LLC, a Delaware limited liability company and the general partner of the Registrant

Magellan Ammonia Pipeline, L.P., a Delaware limited partnership

Magellan Asset Services, L.P., a Delaware limited partnership

Magellan Crude Oil Pipeline Company, L.P., a Delaware limited partnership

Magellan Logistics & Services, L.P., a Delaware limited partnership

Magellan Midstream Holdings GP, LLC, a Delaware limited liability company

Magellan NGL, LLC, a Delaware limited liability company

Magellan OLP, L.P., a Delaware limited partnership

Magellan Operating Company, LLC, a Delaware limited partnership

Magellan Operating GP, LLC, a Delaware limited liability company

Magellan Pipeline Company, L.P., a Delaware limited partnership

Magellan Pipeline GP, LLC, a Delaware limited liability company

Magellan Pipeline Terminals, L.P., a Delaware limited partnership

Magellan Pipelines Holdings, L.P., a Delaware limited partnership

Magellan Processing, L.P., a Delaware limited partnership

Magellan Terminals Holdings, L.P., a Delaware limited partnership

MGG GP Holdings, LLC, a Delaware limited liability company

EX-23

Exhibit 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

1.Registration Statement (Form S-3ASR No. 333-223097) of Magellan Midstream Partners, L.P. (the Partnership),

2.Registration Statement (Form S-8 No. 333-212836) pertaining to the Long-Term Incentive Plan of the Partnership,

3.Registration Statement (Form S-8 No. 333-176062) pertaining to the Long-Term Incentive Plan of the Partnership,

4.Registration Statement (Form S-8 No. 333-71670) pertaining to the Long-Term Incentive Plan of the Partnership, as amended by Post-Effective Amendment No. 1, and

5.Registration Statement (Form S-8 No. 333-147206) pertaining to the Long-Term Incentive Plan of the Partnership;

of our reports dated February 18, 2021, with respect to the consolidated financial statements of the Partnership and the effectiveness of internal control over financial reporting of the Partnership included in this Annual Report (Form 10-K) of the Partnership for the year ended December 31, 2020.

/s/ Ernst & Young LLP

Tulsa, Oklahoma

February 18, 2021

EX-31.A

Exhibit 31(a)

CERTIFICATION

I, Michael N. Mears, certify that:

1.    I have reviewed this Annual Report on Form 10-K for the fiscal year ending December 31, 2020 (this “report”) of Magellan Midstream Partners, L.P. (the “registrant”);

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)    Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)    Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.    The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: February 18, 2021

/s/ Michael N. Mears

Michael N. Mears, principal executive officer

EX-31.B

Exhibit 31(b)

CERTIFICATION

I, Jeff Holman, certify that:

1.    I have reviewed this Annual Report on Form 10-K for the fiscal year ending December 31, 2020 (this “report”) of Magellan Midstream Partners, L.P. (the “registrant”);

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)    Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)    Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.    The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: February 18, 2021

/s/ Jeff Holman

Jeff Holman, principal financial and accounting officer

EX-32.A

Exhibit 32(a)

The following certification shall not be deemed “filed” for purposes of Section 18 of the Exchange Act or otherwise subject to the liability of that section. Such certification will not be deemed to be incorporated by reference into any filing under the Securities Act or the Exchange Act, except to the extent that the registrant specifically incorporates it by reference.

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of Magellan Midstream Partners, L.P. (the “Partnership”) for the fiscal year ending December 31, 2020, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Michael N. Mears, Chief Executive Officer of Magellan GP, LLC, the General Partner of the Partnership, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Partnership.

/s/ Michael N. Mears

Michael N. Mears, Chief Executive Officer

Date: February 18, 2020

A signed original of this written statement required by Section 906 has been provided to the Partnership and will be retained by the Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.B

Exhibit 32(b)

The following certification shall not be deemed “filed” for purposes of Section 18 of the Exchange Act or otherwise subject to the liability of that section. Such certification will not be deemed to be incorporated by reference into any filing under the Securities Act or the Exchange Act, except to the extent that the registrant specifically incorporates it by reference.

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of Magellan Midstream Partners, L.P. (the “Partnership”) for the fiscal year ending December 31, 2019, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jeff Holman, Chief Financial Officer of Magellan GP, LLC, the General Partner of the Partnership, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Partnership.

/s/ Jeff Holman

Jeff Holman, Chief Financial Officer

Date: February 18, 2020

A signed original of this written statement required by Section 906 has been provided to the Partnership and will be retained by the Partnership and furnished to the Securities and Exchange Commission or its staff upon request.

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Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 17, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	1-16335
Entity Registrant Name	Magellan Midstream Partners, L.P.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	73-1599053
Entity Address, Address Line One	One Williams Center
Entity Address, Address Line Two	P.O. Box 22186
Entity Address, City or Town	Tulsa
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	74121-2186
City Area Code	918
Local Phone Number	574-7000
Title of 12(b) Security	Common Units
Trading Symbol	MMP
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 9,686,843,947
Entity Common Stock, Shares Outstanding (in shares)		223,282,818
Documents Incorporated by Reference	Portions of the registrant’s Proxy Statement prepared for the solicitation of proxies in connection with the 2021 Annual Meeting of Limited Partners are to be incorporated by reference in Part III of this Form 10-K.
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Central Index Key	0001126975
Current Fiscal Year End Date	--12-31

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Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues	$ 2,427,802	$ 2,727,912	$ 2,826,573
Costs and expenses:
Operating	601,359	634,081	649,436
Cost of product sales	513,715	619,279	704,313
Depreciation and amortization	258,676	246,134	265,077
General and administrative	173,478	196,650	194,283
Total costs and expenses	1,547,228	1,696,144	1,813,109
Other operating income (expense)	101	2,975	0
Earnings of non-controlled entities	153,327	168,961	181,117
Operating profit	1,034,002	1,203,704	1,194,581
Interest expense	234,133	221,123	220,979
Interest capitalized	(11,270)	(19,284)	(17,455)
Interest income	(1,037)	(3,285)	(3,010)
Gain on disposition of assets	(12,887)	(28,966)	(353,797)
Other (income) expense	5,164	11,830	13,868
Income before provision for income taxes	819,899	1,022,286	1,333,996
Provision for income taxes	2,934	1,437	71
Net income	$ 816,965	$ 1,020,849	$ 1,333,925
Basic net income per limited partner unit (in dollars per share)	$ 3.62	$ 4.46	$ 5.84
Diluted net income per limited partner unit (in dollars per share)	$ 3.62	$ 4.46	$ 5.84
Weighted average number of common units outstanding used for basic net income per unit calculation (in shares)	225,503	228,658	228,377
Weighted average number of common units outstanding used for diluted net income per unit calculation (in shares)	225,531	228,842	228,573
Service [Member]
Revenues	$ 1,794,854	$ 1,970,630	$ 1,878,988
Product [Member]
Revenues	611,719	736,092	927,220
Product and Service, Other [Member]
Revenues	$ 21,229	$ 21,190	$ 20,365

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Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 816,965	$ 1,020,849	$ 1,333,925
Other comprehensive income:
Net gain (loss) on cash flow hedges	(9,484)	(25,216)	4,317
Reclassification of net loss on cash flow hedges to income	3,445	2,736	2,958
Net actuarial loss	(23,499)	(27,351)	(2,323)
Curtailment gain	1,703	0	0
Recognition of prior service credit amortization in income	(181)	(181)	(181)
Recognition of actuarial loss amortization in income	5,934	5,820	10,352
Recognition of settlement cost in income	969	2,606	1,964
Total other comprehensive income (loss)	(21,113)	(41,586)	17,087
Comprehensive income	$ 795,852	$ 979,263	$ 1,351,012

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Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 13,036	$ 58,030
Trade accounts receivable	109,136	125,440
Other accounts receivable	37,075	23,887
Inventory	167,389	184,399
Commodity derivatives deposits	34,165	27,415
Other current assets	44,392	40,237
Total current assets	405,193	459,408
Property, plant and equipment	8,352,825	8,431,227
Less: accumulated depreciation	2,091,134	2,027,193
Net property, plant and equipment	6,261,691	6,404,034
Investments in non-controlled entities	1,213,856	1,240,551
Right-of-use asset, operating leases	166,078	171,868
Financing Receivable, after Allowance for Credit Loss, Noncurrent	22,755	20,782
Goodwill	52,830	53,260
Other intangibles (less accumulated amortization of $6,255 and $9,228 at December 31, 2019 and 2020, respectively)	44,925	47,898
Restricted cash	9,411	26,569
Other noncurrent assets	20,243	13,359
Total assets	8,196,982	8,437,729
Current liabilities:
Accounts payable	100,022	150,992
Accrued payroll and benefits	52,490	75,511
Accrued interest payable	58,998	64,276
Accrued taxes other than income	68,313	66,007
Deferred revenue	98,897	109,654
Accrued product purchases	79,166	90,788
Energy commodity derivatives contracts, net	22,372	10,222
Current portion of operating lease liability	27,533	26,221
Other current liabilities	50,783	73,205
Total current liabilities	558,574	666,876
Long-term operating lease liability	137,483	144,023
Long-term Debt, Excluding Current Maturities	4,978,691	4,706,075
Long-term pension and benefits	163,776	145,992
Other noncurrent liabilities	54,652	59,735
Commitments and contingencies
Partners' capital:
Common unitholders (228,403 units and 223,120 units outstanding at December 31, 2019 and 2020, respectively)	2,486,996	2,877,105
Accumulated other comprehensive loss	(183,190)	(162,077)
Total partners’ capital	2,303,806	2,715,028
Total liabilities and partners' capital	$ 8,196,982	$ 8,437,729

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Other intangibles, accumulated amortization	$ 9,228	$ 6,255
Limited partner unitholders, units outstanding (in shares)	223,119,811	228,403,428

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Consolidated Statments of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Activities:
Net income	$ 816,965	$ 1,020,849	$ 1,333,925
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	258,676	246,134	265,077
Gain on sale and retirement of assets	(12,887)	(28,966)	(328,055)
Earnings of non-controlled entities	(153,327)	(168,961)	(181,117)
Distributions from operations of non-controlled entities	207,600	203,602	196,686
Equity-based incentive compensation expense	11,985	24,012	32,053
Settlement cost, amortization of prior service credit and actuarial loss	6,722	8,245	12,135
Debt extinguishment costs	12,893	8,270	0
Changes in components of operating assets and liabilities (Note 8)	(41,249)	7,994	22,246
Net cash provided by operating activities	1,107,378	1,321,179	1,352,950
Investing Activities:
Additions to property, plant and equipment	(439,574)	(943,990)	(552,257)
Proceeds from sale and disposition of assets	334,894	65,366	576,568
Investments in non-controlled entities	(95,068)	(212,380)	(216,424)
Distributions from returns of investments in non-controlled entities	501	8,494	1,786
Deposits received from undivided joint interest third party	0	75,258	71,071
Net cash used by investing activities	(199,247)	(1,007,252)	(119,256)
Financing Activities:
Distributions paid	(927,117)	(921,606)	(865,431)
Repurchase of common units	(276,940)	0	0
Borrowings under long-term notes	828,434	996,405	0
Debt placement costs	(7,583)	(12,012)	(404)
Payments on notes	(550,000)	(550,000)	(250,000)
Debt extinguishment costs	(12,893)	(8,270)	0
Net receipt (payment) on financial derivatives	(9,484)	(33,342)	24,619
Payments associated with settlement of equity-based incentive compensation	(14,700)	(9,764)	(9,285)
Net cash used by financing activities	(970,283)	(538,589)	(1,100,501)
Change in cash, cash equivalents and restricted cash	(62,152)	(224,662)	133,193
Cash, cash equivalents and restricted cash at beginning of period	84,599	309,261	176,068
Cash, cash equivalents and restricted cash at end of period	22,447	84,599	309,261
Noncash Investing and Financing Items [Abstract]
Additions to property, plant and equipment	(358,765)	(980,575)	(562,296)
Changes in accounts payable and other current liabilities related to capital expenditures	(80,809)	36,585	10,039
Additions to property, plant and equipment, net	$ (439,574)	$ (943,990)	$ (552,257)

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Consolidated Statement Of Partners' Capital - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Limited Partner [Member]	Limited Partner [Member] Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss [Member]
Net income	$ 1,333,925		$ 1,333,925
Beginning Balance at Dec. 31, 2017	2,129,653	$ 5,975	2,267,231	$ 5,975	$ (137,578)
Comprehensive income:
Total other comprehensive income (loss)	17,087				17,087
Total comprehensive income (loss)	1,351,012		1,333,925		17,087
Distributions	(865,431)		(865,431)
Equity-based incentive compensation expense	32,053		32,053
Issuance of common units in settlement of equity-based incentive plan awards	120		120
Payments associated with settlement of equity-based incentive compensation	(9,285)		(9,285)
Other	(663)		(663)
Ending Balance at Dec. 31, 2018	2,643,434		2,763,925		(120,491)
Net income	1,020,849		1,020,849
Comprehensive income:
Total other comprehensive income (loss)	(41,586)				(41,586)
Total comprehensive income (loss)	979,263		1,020,849		(41,586)
Distributions	(921,606)		(921,606)
Equity-based incentive compensation expense	24,012		24,012
Issuance of common units in settlement of equity-based incentive plan awards	480		480
Payments associated with settlement of equity-based incentive compensation	(9,764)		(9,764)
Other	(791)		(791)
Ending Balance at Dec. 31, 2019	2,715,028		2,877,105		(162,077)
Net income	816,965		816,965
Comprehensive income:
Total other comprehensive income (loss)	(21,113)				(21,113)
Total comprehensive income (loss)	795,852		816,965		(21,113)
Distributions	(927,117)		(927,117)
Equity-based incentive compensation expense	11,985		11,985
Repurchase of common units	(276,940)		(276,940)
Issuance of common units in settlement of equity-based incentive plan awards	600		600
Payments associated with settlement of equity-based incentive compensation	(14,700)		(14,700)
Other	(902)		(902)
Ending Balance at Dec. 31, 2020	$ 2,303,806		$ 2,486,996		$ (183,190)

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Organization and Description of Business

12 Months Ended

Dec. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Description of Business

Organization and Description of Business

Organization

Unless indicated otherwise, the terms “our,” “we,” “us” and similar language refer to Magellan Midstream Partners, L.P. together with its subsidiaries. Magellan Midstream Partners, L.P. is a Delaware limited partnership, and its common units are traded on the New York Stock Exchange under the ticker symbol “MMP.” Magellan GP, LLC, a wholly owned Delaware limited liability company, serves as its general partner.

Description of Business

We are principally engaged in the transportation, storage and distribution of refined petroleum products and crude oil. As of December 31, 2020, our asset portfolio consisted of:

•our refined products segment, comprised of our approximately 9,800-mile refined petroleum products pipeline system with 54 terminals as well as 25 independent terminals not connected to our pipeline system and two marine storage terminals (one of which is owned through a joint venture); and

•our crude oil segment, comprised of approximately 2,200 miles of crude oil pipelines, a condensate splitter and 37 million barrels of aggregate storage capacity, of which approximately 27 million barrels are used for contract storage. Approximately 1,000 miles of these pipelines, the condensate splitter and 30 million barrels of this storage capacity (including 24 million barrels used for contract storage) are wholly-owned, with the remainder owned through joint ventures.

Description of Products

The following terms are commonly used in our industry to describe products that we transport, store, distribute or otherwise handle through our petroleum pipelines and terminals:

•refined products are the output from crude oil refineries that are primarily used as fuels by consumers. Refined products include gasoline, diesel fuel, aviation fuel, kerosene and heating oil.  Diesel fuel, kerosene and heating oil are also referred to as distillates;

•transmix is a mixture that forms when different refined products are transported in pipelines. Transmix is fractionated and blended into usable refined products;

•liquefied petroleum gases, or LPGs, are liquids produced as by-products of the crude oil refining process and in connection with natural gas production. LPGs include butane and propane;

•blendstocks are products blended with refined products to change or enhance their characteristics such as increasing a gasoline’s octane or oxygen content. Blendstocks include alkylates, oxygenates and natural gasoline;

•crude oil, which includes condensate, is a naturally occurring unrefined petroleum product recovered from underground that is used as feedstock by refineries, splitters and petrochemical facilities; and

•renewable fuels, such as ethanol, biodiesel and renewable diesel, are fuels derived from living materials and typically blended with other refined products as required by government mandates.

We use the term petroleum products to describe any, or a combination, of the above-noted products.

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Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Significant Accounting Policies

Basis of Presentation. Our consolidated financial statements include our refined products and crude oil operating segments. We consolidate all entities in which we have a controlling ownership interest. We apply the equity method of accounting to investments in entities over which we exercise significant influence but do not control. We eliminate all intercompany transactions.

Reclassifications. Certain prior year amounts have been reclassified to conform with the current period’s presentation.

Use of Estimates. The preparation of our consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities that exist at the date of our consolidated financial statements, as well as their impact on the reported amounts of revenue and expense during the reporting periods. Actual results could differ from those estimates.

Cash Equivalents. Cash and cash equivalents include demand and time deposits and funds that own highly marketable securities with original maturities of three months or less when acquired. We periodically assess the financial condition of the institutions where we hold these funds, and, at December 31, 2019 and 2020, we believed our credit risk relative to these funds was minimal.

Restricted Cash. Restricted cash includes cash that we are contractually required to use for the construction of fixed assets and is unavailable for general use. It is classified as noncurrent due to its designation to be used for the construction of noncurrent assets.

Accounts Receivable and Allowance for Doubtful Accounts. Accounts receivable represent valid claims against customers. We recognize accounts receivable when we sell products or render services and collection of the receivable is probable. We extend credit terms to certain customers after a review of various credit indicators. We establish an allowance for doubtful accounts using an expected credit loss approach and evaluate reserves no less than quarterly to determine their adequacy. Judgments relative to at-risk accounts include the customers’ current financial condition, the customers’ historical relationship with us and current and projected economic conditions. We write off accounts receivable when we deem an account uncollectible.

Product Overages and Shortages. Each period end we measure the volume of each type of product in our pipeline systems and terminals, which is compared to the volumes of our customers’ inventories (as adjusted for tender deductions).  To the extent the product volumes in our pipeline systems and terminals exceed the volumes of our customers’ book inventories, we recognize a gain from the product overage and increase our product inventories. To the extent the product in our pipeline systems and terminals is less than our customers’ book inventories, we recognize a loss from the product shortage and we record a liability for product owed to our customers.  The product overages we recognize are recorded based on market prices, and the resulting inventory is carried at weighted average cost.  The product shortages we recognize are recorded based on our weighted average cost.  Additionally, when product shortages result in a net short inventory position, the related liability is recorded based on period-end market prices.  Product overages and shortages as well as adjustments to the value of net short inventory positions are recorded in operating expenses on our consolidated statements of income.

Income Taxes. We are a partnership for income tax purposes and therefore are not subject to federal or state income taxes for most of the states in which we operate. The tax on our net income is borne by our unitholders through allocation to them of their share of taxable income. Net income for financial statement purposes may differ significantly from taxable income of unitholders because of differences between the tax basis and financial reporting basis of assets and liabilities and the taxable income allocation requirements under our partnership agreement. The aggregate difference in the basis of our net assets for financial and tax reporting purposes cannot be readily determined because information regarding each unitholder’s tax attributes is not available to us.

The amounts recognized as provision for income taxes in our consolidated statements of income are primarily

comprised of partnership-level taxes levied by the state of Texas. This tax is based on revenues less direct costs of sale for our assets apportioned to the state of Texas.

Net Income Per Unit. We calculate basic net income per common unit for each period by dividing net income by the weighted-average number of common units outstanding. The difference between our actual common units outstanding and our weighted-average number of common units outstanding used to calculate net income per common unit is due to the impact of: (i) the phantom units issued to our independent directors, which are included in the calculation of basic and diluted weighted average units outstanding, and (ii) the weighted-average effect of units actually issued or repurchased during a period.  The difference between the weighted-average number of common units outstanding used for basic and diluted net income per unit calculations on our consolidated statements of income is primarily the dilutive effect of phantom unit awards granted pursuant to our long-term incentive plan, which have not yet vested in periods where contingent performance metrics have been met.

Index of Additional Significant Accounting Policies

Revenue from Contracts with Customers	Note 4 – Revenue
Property, Plant and Equipment	Note 5 – Property, Plant and Equipment, Goodwill and Other Intangibles
Goodwill and Other Intangible Assets	Note 5 – Property, Plant and Equipment, Goodwill and Other Intangibles
Investments in Non-Controlled Entities	Note 6 – Investments in Non-Controlled Entities
Inventory	Note 7 – Inventory
Leases	Note 10 – Leases
Pension and Postretirement Medical and Life Benefit Obligations	Note 11 – Employee Benefit Plans
Equity-Based Incentive Compensation	Note 12 – Long-Term Incentive Plan
Derivative Financial Instruments	Note 13 – Derivative Financial Instruments
Contingencies and Environmental	Note 15 – Commitments and Contingencies

New Accounting PronouncementsIn June 2016, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments - Credit Losses (Topic 326). The new guidance is effective for reporting periods beginning after December 15, 2019. The standard replaces the incurred loss impairment methodology under current GAAP with a methodology that reflects expected credit losses and requires the use of a forward-looking expected credit loss model for accounts receivables, loans and other financial instruments. The standard requires a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. We adopted the new guidance as of January 1, 2020 using the modified retrospective approach related to our accounts receivables and contract assets, resulting in no cumulative adjustment to retained earnings. The adoption of this guidance did not have a material impact on our consolidated statements of income for the year ended December 31, 2020.

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Segment Disclosures

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Segment Disclosures

Segment Disclosures

Our reportable segments are strategic business units that offer different products and services. Our segments are managed separately because each segment requires different marketing strategies and business knowledge. Management evaluates performance based on segment operating margin, which includes revenue from affiliates and third-party customers, operating expenses, cost of product sales, other operating (income) expense and earnings of non-controlled entities.

We believe that investors benefit from having access to the same financial measures used by management. Operating margin, which is presented in the following tables, is an important measure used by management to evaluate the economic performance of our core operations. Operating margin is not a GAAP measure, but the components of operating margin are computed using amounts that are determined in accordance with GAAP. A reconciliation of operating margin to operating profit, which is its nearest comparable GAAP financial measure, is included in the tables below. Operating profit includes depreciation, amortization and impairment expense and general and administrative (“G&A”) expense that management does not consider when evaluating the core profitability of our separate operating segments.

	Year Ended December 31, 2018
	(in thousands)
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation and terminals revenue	$	1,316,616	$	566,063	$	(3,691)	$	1,878,988
Product sales revenue	880,453		46,767		—		927,220
Affiliate management fee revenue	5,533		14,832		—		20,365
Total revenue	2,202,602		627,662		(3,691)		2,826,573
Operating expenses	486,596		172,478		(9,638)		649,436
Cost of product sales	660,185		44,128		—		704,313
Earnings of non-controlled entities	(18,884)		(162,233)		—		(181,117)
Operating margin	1,074,705		573,289		5,947		1,653,941
Depreciation, amortization and impairment expense	202,047		57,083		5,947		265,077
G&A expenses	140,333		53,950		—		194,283
Operating profit	$	732,325	$	462,256	$	—	$	1,194,581
Additions to long-lived assets	$	357,359	$	148,995			$	506,354
	As of December 31, 2018
Segment assets	$	4,687,351	$	2,803,895			$	7,491,246
Corporate assets							256,291
Total assets							$	7,747,537
Goodwill	$	41,178	$	12,082			$	53,260
Investments in non-controlled entities	$	292,820	$	783,486			$	1,076,306

	Year Ended December 31, 2019
	(in thousands)
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation and terminals revenue	$	1,355,682	$	620,365	$	(5,417)	$	1,970,630
Product sales revenue	707,812		28,280		—		736,092
Affiliate management fee revenue	6,719		14,471		—		21,190
Total revenue	2,070,213		663,116		(5,417)		2,727,912
Operating expenses	471,743		173,261		(10,923)		634,081
Cost of product sales	591,228		28,051		—		619,279
Other operating (income) expense	(10,185)		7,210		—		(2,975)
Earnings of non-controlled entities	(8,070)		(160,891)		—		(168,961)
Operating margin	1,025,497		615,485		5,506		1,646,488
Depreciation, amortization and impairment expense	174,096		66,532		5,506		246,134
G&A expenses	140,735		55,915		—		196,650
Operating profit	$	710,666	$	493,038	$	—	$	1,203,704
Additions to long-lived assets	$	805,902	$	74,235			$	880,137
	As of December 31, 2019
Segment assets	$	5,411,920	$	2,894,733			$	8,306,653
Corporate assets							131,076
Total assets							$	8,437,729
Goodwill	$	41,178	$	12,082			$	53,260
Investments in non-controlled entities	$	422,384	$	818,167			$	1,240,551

	Year Ended December 31, 2020
	(in thousands)
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation and terminals revenue	$	1,241,846	$	559,570	$	(6,562)	$	1,794,854
Product sales revenue	578,630		33,089		—		611,719
Affiliate management fee revenue	6,270		14,959		—		21,229
Total revenue	1,826,746		607,618		(6,562)		2,427,802
Operating expenses	425,443		189,087		(13,171)		601,359
Cost of product sales	471,292		42,423		—		513,715
Other operating (income) expense	(3,247)		3,146		—		(101)
Earnings of non-controlled entities	(32,555)		(120,772)		—		(153,327)
Operating margin	965,813		493,734		6,609		1,466,156
Depreciation, amortization and impairment expense	175,510		76,557		6,609		258,676
G&A expenses	125,742		47,736		—		173,478
Operating profit	$	664,561	$	369,441	$	—	$	1,034,002
Additions to long-lived assets	$	291,863	$	56,401			$	348,264
	As of December 31, 2020
Segment assets	$	5,269,691	$	2,836,888			$	8,106,579
Corporate assets							90,403
Total assets							$	8,196,982
Goodwill	$	40,748	$	12,082			$	52,830
Investments in non-controlled entities	$	429,193	$	784,663			$	1,213,856

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Revenue from Contract with Customer (Notes)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

Revenue

Revenue recognition policies

Revenue is recognized upon the satisfaction of each performance obligation required by our customer contracts. Transportation and terminals revenue is recognized over time as our customers receive the benefits of our service as it is performed on their behalf using an output method based on actual deliveries. Revenue for our storage services is recognized over time using an output method based on the capacity of storage under contract with our customers. Product sales revenue is recognized at a point in time when our customers take control of the commodities purchased. We record back-to-back purchases and sales of petroleum products on a net basis.

We recognize pipeline transportation revenue for crude oil shipments when our customers’ product arrives at the customer-designated destination.  For shipments of refined products under published tariffs that combine transportation and terminalling services, we recognize revenue when our customers take delivery of their product from our system. For shipments where terminalling services are not included in the tariff, we recognize revenue when our customers’ product arrives at the customer-designated destination. We have certain contracts that require counterparties to ship a minimum volume over an agreed-upon time period, which are contracted as minimum dollar or volume commitments. Revenue pursuant to these take-or-pay contracts is recognized when the customers utilize their committed volumes. Additionally, when we estimate that the customers will not utilize all or a portion of their committed volumes, we recognize revenue in proportion to the pattern of exercised rights for the respective commitment period.

Our interstate common carrier petroleum products pipeline operations are subject to rate regulation by the Federal Energy Regulatory Commission (“FERC”) under the Interstate Commerce Act, the Energy Policy Act of 1992 and rules and orders promulgated pursuant thereto. FERC regulation requires that interstate pipeline rates be filed with the FERC, be posted publicly and be nondiscriminatory and “just and reasonable.” The rates on approximately 40% of the shipments on our refined products pipeline system are regulated by the FERC primarily through an index methodology. As an alternative to cost-of-service or index-based rates, interstate pipeline companies may establish rates by obtaining authority to charge market-based rates in competitive markets or by negotiation with unaffiliated shippers. Approximately 60% of our refined products pipeline system’s markets are either subject to regulations by the states in which we operate or are approved for market-based rates by the FERC, and in both cases these rates can generally be adjusted at our discretion based on market factors. Most of the tariffs on our crude oil pipelines are established by negotiated rates that generally provide for annual adjustments in line with changes in the FERC index, subject to certain modifications.

For both our index-based rates and our market-based rates, our published tariffs serve as contracts, and shippers nominate the volume to be shipped up to a month in advance.  These tariffs include provisions which allow us to deduct from our customer’s inventory a small percentage of the products our customers transport on our pipeline systems. We refer to this non-monetary consideration as tender deduction revenue.  We receive tender deductions from our customers as consideration for product losses during the transportation of petroleum products within our pipeline systems.  Tender deduction revenue is generally recognized as transportation revenue when the customer's transported commodities reach their destination and is recorded at the fair value of the product received on the date received or the contract date, as applicable.

Product sales revenue pricing is contractually specified, and we have determined that each barrel sold represents a separate performance obligation. Transaction prices for our other services including terminalling, storage and ancillary services are typically contracted as a single performance obligation with our customers. In circumstances where multiple performance obligations are contractually required, we allocate the transaction price to the various performance obligations based on their relative standalone selling price.

The following tables provide details of our revenues disaggregated by key activities that comprise our performance obligations by operating segment (in thousands):

	Year Ended December 31, 2018
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation	$	758,028	$	374,352	$	—	$	1,132,380
Terminalling	182,648		6,365		—		189,013
Storage	212,112		98,597		(3,691)		307,018
Ancillary services	136,122		26,151		—		162,273
Lease revenue	27,706		60,598		—		88,304
Transportation and terminals revenue	1,316,616		566,063		(3,691)		1,878,988
Product sales revenue	880,453		46,767		—		927,220
Affiliate management fee revenue	5,533		14,832		—		20,365
Total revenue	2,202,602		627,662		(3,691)		2,826,573
Revenue not under the guidance of ASC 606:
Lease revenue(1)	(27,706)		(60,598)		—		(88,304)
(Gains) losses from futures contracts included in product sales revenue(2)	(85,643)		632		—		(85,011)
Affiliate management fee revenue	(5,533)		(14,832)		—		(20,365)
Total revenue from contracts with customers under ASC 606	$	2,083,720	$	552,864	$	(3,691)	$	2,632,893

(1) Lease revenue is accounted for under ASC 840, Leases.

(2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging.

	Year Ended December 31, 2019
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation	$	787,688	$	381,654	$	—	$	1,169,342
Terminalling	185,008		17,822		—		202,830
Storage	215,042		119,330		(5,417)		328,955
Ancillary services	140,055		28,376		—		168,431
Lease revenue	27,889		73,183		—		101,072
Transportation and terminals revenue	1,355,682		620,365		(5,417)		1,970,630
Product sales revenue	707,812		28,280		—		736,092
Affiliate management fee revenue	6,719		14,471		—		21,190
Total revenue	2,070,213		663,116		(5,417)		2,727,912
Revenue not under the guidance of ASC 606:
Lease revenue(1)	(27,889)		(73,183)		—		(101,072)
(Gains) losses from futures contracts included in product sales revenue(2)	69,538		3,024		—		72,562
Affiliate management fee revenue	(6,719)		(14,471)		—		(21,190)
Total revenue from contracts with customers under ASC 606	$	2,105,143	$	578,486	$	(5,417)	$	2,678,212

(1) Lease revenue is accounted for under ASC 842, Leases.

(2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging.

	Year Ended December 31, 2020
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation	$	742,951	$	305,397	$	—	$	1,048,348
Terminalling	149,859		21,463		—		171,322
Storage	200,091		129,048		(6,562)		322,577
Ancillary services	125,268		26,936		—		152,204
Lease revenue	23,677		76,726		—		100,403
Transportation and terminals revenue	1,241,846		559,570		(6,562)		1,794,854
Product sales revenue	578,630		33,089		—		611,719
Affiliate management fee revenue	6,270		14,959		—		21,229
Total revenue	1,826,746		607,618		(6,562)		2,427,802
Revenue not under the guidance of ASC 606:
Lease revenue(1)	(23,677)		(76,726)		—		(100,403)
(Gains) losses from futures contracts included in product sales revenue(2)	(62,317)		3,624		—		(58,693)
Affiliate management fee revenue	(6,270)		(14,959)		—		(21,229)
Total revenue from contracts with customers under ASC 606	$	1,734,482	$	519,557	$	(6,562)	$	2,247,477

(1) Lease revenue is accounted for under ASC 842, Leases.

(2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging.

Balance Sheet Disclosures

We invoice customers on our refined products pipelines for transportation services when their product enters our system. At each period end, we record all invoiced amounts associated with products that have not yet been delivered (in-transit products) as a contract liability. This liability is presented as deferred revenue on our consolidated balance sheets. Deferred revenue is also recorded for pre-payments received in conjunction with take-or-pay contracts, storage contracts and other service offerings in which the service to our customers remains unfulfilled. Additionally, at each period end, we defer the direct costs we have incurred associated with our customers’ in-transit products as contract assets. Contract assets are presented on our consolidated balance sheets as other current assets. These direct costs are estimated based on our per-barrel direct delivery cost for the current period multiplied by the total in-transit barrels in our system at the end of the period multiplied by 50% to reflect the average transportation costs incurred for all products across all of our pipeline systems. We use 50% of the in-transit barrels because that best represents the average delivery point of all barrels in our pipeline system. These contract assets and contract liabilities are determined using judgments and assumptions that management considers reasonable.

The following table summarizes our accounts receivable, contract assets and contract liabilities resulting from contracts with customers (in thousands):

	December 31, 2019		December 31, 2020
Accounts receivable from contracts with customers	$	124,701	$	108,843
Contract assets	$	8,071	$	12,220
Contract liabilities	$	111,670	$	102,964

For the year ended December 31, 2020, we recognized $93.4 million of transportation and terminals revenue that was recorded in deferred revenue as of December 31, 2019.

Unfulfilled Performance Obligations

We have certain contracts with customers that represent customer commitments to purchase a minimum amount of our services over specified time periods. These contracts require us to provide services to our customers in the future and result in our having unfulfilled performance obligations (“UPOs”) to our customers related to the periods remaining under each contract. We have UPOs in many of our core business services, including transportation, terminalling and storage services. The UPOs will be recognized as revenue in the future as our customers utilize our services or when we estimate that our customers are not likely to use all or a portion of their commitments.

The following table provides the aggregate amount of the transaction price allocated to our UPOs as of December 31, 2020 by operating segment, including the range of years remaining on our contracts with customers and an estimate of revenues expected to be recognized over the next 12 months (dollars in thousands):

	Refined Products		Crude Oil		Total
Balances at December 31, 2020	$	2,015,459	$	1,262,305	$	3,277,764
Remaining terms	1 - 18 years		1 - 11 years
Estimated revenues from UPOs to be recognized in the next 12 months	$	383,897	$	273,782	$	657,679

In computing the value of these future revenues, we have used the current rates in effect as of December 31, 2020 and have not included any estimates for future rate changes due to changes in the FERC index or other contractually negotiated rate escalations. Our UPO balances include the full amount of our customer commitments as of December 31, 2020 through the expiration of the related contracts. The UPO balances disclosed exclude all performance obligations for which the original expected term is one year or less, the consideration is variable or the future use of our services is fully at the discretion of our customers.

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Property, Plant and Equipment and Other Intangibles

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment and Other Intangibles

Property, Plant and Equipment, Goodwill and Other Intangibles

Property, Plant and Equipment

Property, plant and equipment consist primarily of pipeline, pipeline-related equipment, storage tanks and processing equipment. We state property, plant and equipment at cost except for certain acquired assets recorded at fair value on their respective acquisition dates and impaired assets. We record impaired assets at fair value on the last impairment evaluation date for which an adjustment was required.

We assign asset lives based on reasonable estimates when we place an asset into service. Subsequent events could cause us to change our estimates, which would affect the future calculation of depreciation expense.

When we sell or retire property, plant and equipment, we remove its carrying value and the related accumulated depreciation from our accounts and record any associated gains or losses on our consolidated statements of income in the period of sale or disposition.

We capitalize expenditures to replace existing assets and retire the replaced assets. We capitalize expenditures when they extend the useful life, increase the productivity or capacity or improve the safety or efficiency of the asset. We capitalize direct project costs such as labor and materials as incurred. Indirect project costs, such as overhead, are capitalized based on a percentage of direct labor charged to the respective capital project. We charge expenditures for maintenance, repairs and minor replacements to operating expense in the period incurred.

During construction, we capitalize interest on all construction projects requiring a completion period of three months or longer and total project costs exceeding $0.5 million. The interest we capitalize is based on the weighted-average interest rate of our debt. The weighted average rates used to capitalize interest on borrowed funds were 4.8%, 4.6% and 4.4% for the years ended December 31, 2018, 2019 and 2020, respectively.

Property, plant and equipment consisted of the following (in thousands):

					Estimated  Depreciable Lives
	December 31,
	2019		2020
Construction work-in-progress	$	515,312	$	125,173
Land and rights-of-way	336,982		385,190
Buildings	125,772		126,619		10 to 53 years
Storage tanks	2,206,839		2,085,601		10 to 49 years
Pipeline and station equipment	2,917,059		3,327,078		10 to 59 years
Processing equipment	2,044,589		2,006,835		3 to 56 years
Other	284,674		296,329		3 to 53 years
Property, Plant and Equipment, Gross	$	8,431,227	$	8,352,825

Other includes total interest capitalized on construction in progress as of December 31, 2019 and 2020 of $86.4 million and $98.4 million, respectively. Depreciation expense for the years ended December 31, 2018, 2019 and 2020 was $214.4 million, $242.9 million and $256.0 million, respectively.

Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. In reviewing for impairment, the carrying value of such assets is compared to the estimated undiscounted future cash flows expected from the use of the assets and their eventual disposition. If such cash flows are not sufficient to support the asset’s recorded value, an impairment charge is recognized to reduce the carrying value of the long-lived asset to its estimated fair value. The determination of future cash flows as well as the estimated fair value of long-lived assets involves significant estimates on the part of management.

During 2018, we made the decision to discontinue commercial operations of our ammonia pipeline due to the system’s low profitability and challenging economic outlook. We estimated the fair value of the ammonia pipeline assets based on expected future cash flows and recognized a $49.1 million impairment charge in depreciation, amortization and impairment expense on our consolidated statements of income in 2018.

Goodwill

We record the excess of purchase price over the fair value of the tangible and identifiable intangible assets acquired and liabilities assumed in a business acquisition (or combination) as goodwill. The goodwill relating to each of our reporting units is tested for impairment annually as well as when an event or change in circumstances indicates an impairment may have occurred.

For purposes of performing the impairment test for goodwill, our reporting units are our refined products and crude oil segments.  In 2018, we elected to complete the quantitative goodwill impairment test and calculated that the fair value of each of our reporting units was greater than its carrying amount. In 2019 and 2020, we elected to perform the qualitative assessment for purposes of our annual goodwill impairment test and concluded that it was more likely than not that the fair value of each of our reporting units was greater than its carrying amount. Based on this assessment, we concluded goodwill was not impaired.

Other Intangibles

Other intangible assets with finite lives are amortized over their estimated useful lives of seven years up to 30 years. The weighted-average asset life of our other intangible assets at December 31, 2020 was approximately 18 years. We adjust the useful lives of our other intangible assets if events or circumstances indicate there has been a change in the remaining useful lives. We eliminate from our balance sheets the gross carrying amount and the related accumulated amortization for any fully amortized intangibles in the year they are fully amortized. During the years ended December 31, 2018, 2019 and 2020, amortization of other intangible assets was $1.6 million, $3.3 million and $2.7 million, respectively.

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Investments in Non-Controlled Entities

12 Months Ended

Dec. 31, 2020

Equity Method Investments and Joint Ventures [Abstract]

Investments in Non-Controlled Entities

Investments in Non-Controlled EntitiesWe account for interests in affiliates that we do not control using the equity method of accounting. Under this method, an investment is recorded at our acquisition cost or capital contributions, as adjusted by contractual terms, plus equity in earnings or losses since acquisition or formation, plus interest capitalized, less distributions received and amortization of interest capitalized and excess net investment. Excess net investment is the amount by which our investment in a non-controlled entity exceeded our proportionate share of the book value of the net assets of that investment. We amortize excess net investment over the weighted-average depreciable asset lives of the equity investee. Our unamortized excess net investment was $33.9 million and $33.0 million at December 31, 2019 and 2020, respectively. The amount of unamortized excess investment is primarily related to our investment in

BridgeTex. We evaluate equity method investments for impairment whenever events or circumstances indicate that there is an other-than-temporary loss in value of the investment. In the event that we determine that the loss in value of an investment is other-than-temporary, we would record a charge to earnings to adjust the carrying value to fair value. We recognized no equity investment impairments during 2018, 2019 and 2020.

Our equity investments in non-controlled entities at December 31, 2020 were comprised of:

Entity	Ownership Interest
BridgeTex Pipeline Company, LLC (“BridgeTex”)	30%
Double Eagle Pipeline LLC (“Double Eagle”)	50%
HoustonLink Pipeline Company, LLC (“HoustonLink”)	50%
MVP Terminalling, LLC (“MVP”)	50%
Powder Springs Logistics, LLC (“Powder Springs”)	50%
Saddlehorn Pipeline Company, LLC (“Saddlehorn”)	30%
Seabrook Logistics, LLC (“Seabrook”)	50%
Texas Frontera, LLC (“Texas Frontera”)	50%

In the first quarter of 2020, we sold a 10% interest in Saddlehorn to an affiliate of Black Diamond Gathering LLC, which is majority-owned by Noble Midstream Partners LP, reducing our ongoing investment in Saddlehorn to a 30% interest. We received $79.9 million in cash from the sale, and we recorded a gain of $12.9 million on our consolidated statements of income for the year ended December 31, 2020.

We serve as operator of BridgeTex, HoustonLink, MVP, Powder Springs, Saddlehorn, Texas Frontera and the pipeline activities of Seabrook. We receive fees for management services as well as reimbursement or payment to us for certain direct operational payroll and other overhead costs. The management fees we receive are reported as affiliate management fee revenue on our consolidated statements of income. Cost reimbursements we receive from these entities in connection with our operating services are included as reductions to costs and expenses on our consolidated statements of income and totaled $3.9 million, $5.3 million and $3.6 million, respectively, for the years ended December 31, 2018, 2019 and 2020.

We recorded the following revenue and expense transactions from certain of these non-controlled entities in our consolidated statements of income (in thousands):

	Year Ended December 31,
	2018		2019		2020
Transportation and terminals revenue:
BridgeTex, capacity lease	$	39,596	$	41,806	$	42,286
Double Eagle, throughput revenue	$	5,250	$	6,213	$	4,917
Saddlehorn, storage revenue	$	2,180	$	2,234	$	2,483
Operating costs:
Seabrook, storage lease and ancillary services	$	10,572	$	25,851	$	29,116
MVP, sale of air emission reduction credits (reduction of operating costs)	$	(2,161)	$	—	$	—
Product sales revenue:
Powder Springs, butane sales	$	4,899	$	—	$	—
Seabrook, product sales	$	—	$	328	$	—
Cost of product sales:
Powder Springs, butane purchases	$	410	$	—	$	—
Other operating income:
MVP, easement sale	$	—	$	289	$	—
Seabrook, gain on sale of air emission credits	$	—	$	—	$	1,410

Our consolidated balance sheets reflected the following balances related to our investments in non-controlled entities (in thousands):

	December 31, 2019
	Trade Accounts Receivable		Other Accounts Receivable		Other Accounts Payable		Long-Term Receivables
BridgeTex	$	392	$	26	$	—	$	—
Double Eagle	$	445	$	—	$	—	$	—
HoustonLink	$	60	$	—	$	—	$	—
MVP	$	—	$	418	$	—	$	—
Powder Springs	$	161	$	—	$	—	$	6,006
Saddlehorn	$	—	$	126	$	—	$	—
Seabrook	$	941	$	—	$	1,349	$	—

	December 31, 2020
	Trade Accounts Receivable		Other Accounts Receivable		Other Accounts Payable		Long-Term Receivables
BridgeTex	$	355	$	27	$	970	$	—
Double Eagle	$	277	$	—	$	—	$	—
HoustonLink	$	—	$	—	$	144	$	—
MVP	$	—	$	467	$	2,297	$	—
Powder Springs	$	—	$	—	$	—	$	10,223
Saddlehorn	$	—	$	121	$	—	$	—
Seabrook	$	—	$	—	$	7,274	$	—

We entered into a long-term terminalling and storage contract with Seabrook for exclusive use of dedicated tankage that provides our customers with crude oil storage capacity and dock access for crude oil imports and exports on the Texas Gulf Coast (see Note 10 – Leases for more details regarding this lease).

The financial results from Powder Springs, MVP and Texas Frontera are included in our refined products segment and the financial results from BridgeTex, Double Eagle, HoustonLink, Saddlehorn and Seabrook are included in our crude oil segment, each as earnings of non-controlled entities.

A summary of our investments in non-controlled entities (representing only our proportionate interests) follows (in thousands):

Investments at December 31, 2019	$	1,240,551
Additional investment	95,068
Sale of ownership interest in Saddlehorn	(66,989)
Earnings of non-controlled entities:
Proportionate share of earnings	155,140
Amortization of excess investment and capitalized interest	(1,813)
Earnings of non-controlled entities	153,327
Less:
Distributions from operations of non-controlled entities	207,600
Distributions from returns of investments in non-controlled entities	501
Investments at December 31, 2020	$	1,213,856

Summarized financial information of our non-controlled entities (representing 100% of the interests in these entities) follows (in thousands):

	December 31,
	2019		2020
Current assets	$	260,033	$	243,828
Noncurrent assets	2,768,696		2,846,747
Total assets	$	3,028,729	$	3,090,575
Current liabilities	$	160,566	$	143,638
Noncurrent liabilities	60,886		57,515
Total liabilities	$	221,452	$	201,153
Equity	$	2,807,277	$	2,889,422

	Year Ended December 31,
	2018		2019		2020
Revenue	$	631,420	$	782,013	$	752,685
Net income	$	416,128	$	507,464	$	471,438

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Inventory

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Inventory

Inventory

Inventory is comprised primarily of refined products, liquefied petroleum gases, transmix, crude oil and additives, which are stated and relieved at the lower of average cost or net realizable value.

Inventory at December 31, 2019 and 2020 was as follows (in thousands):

	December 31,
	2019		2020
Refined products	$	96,128	$	79,473
Liquefied petroleum gases	29,982		26,734
Transmix	39,546		23,397
Crude oil	12,714		32,431
Additives	6,029		5,354
Total inventory	$	184,399	$	167,389

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Supplemental Cash Flows Information

12 Months Ended

Dec. 31, 2020

Supplemental Cash Flow Information [Abstract]

Supplemental Cash Flows Information

Consolidated Statements of Cash Flows

Changes in the components of operating assets and liabilities are as follows (in thousands):

	Year Ended December 31,
	2018		2019		2020
Trade accounts receivable and other accounts receivable	$	24,169	$	(20,156)	$	(1,172)
Inventory	(3,390)		1,336		15,771
Accounts payable	21,146		(1,237)		4,225
Accrued payroll and benefits	14,015		4,931		(23,269)
Accrued interest payable	(7,399)		1,018		(5,278)
Accrued taxes other than income	1,750		12,914		4,131
Deferred revenue	5,191		(11,431)		(10,757)
Accrued product liabilities	(20,677)		15,306		(11,622)
Other current and noncurrent assets and liabilities	(12,559)		5,313		(13,278)
Total	$	22,246	$	7,994	$	(41,249)

Other current and noncurrent assets and liabilities above exclude certain non-cash items that were reflected in the consolidated balance sheets but were not reflected in the statements of cash flows. At December 31, 2018, 2019 and 2020, the long-term pension and benefits liability was increased by $2.3 million, $27.0 million and $21.5 million, respectively, resulting in a corresponding increase in accumulated other comprehensive loss (“AOCL”).

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Debt

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Debt

Debt

Long-term debt at December 31, 2019 and 2020 was as follows (in thousands): 

	December 31,
	2019		2020
4.25% Notes due 2021	$	550,000	$	—
3.20% Notes due 2025	250,000		250,000
5.00% Notes due 2026	650,000		650,000
3.25% Notes due 2030	—		500,000
6.40% Notes due 2037	250,000		250,000
4.20% Notes due 2042	250,000		250,000
5.15% Notes due 2043	550,000		550,000
4.20% Notes due 2045	250,000		250,000
4.25% Notes due 2046	500,000		500,000
4.20% Notes due 2047	500,000		500,000
4.85%Notes due 2049	500,000		500,000
3.95% Notes due 2050	500,000		800,000
Face value of long-term debt	4,750,000		5,000,000
Unamortized debt issuance costs(1)	(35,263)		(40,143)
Net unamortized debt premium (discount)(1)	(8,662)		18,834
Long-term debt, net	$	4,706,075	$	4,978,691

(1)    Debt issuance costs, note discounts and premiums and realized gains and losses of historical fair value hedges are being amortized or accreted to the applicable notes over the respective lives of those notes.

All of the instruments detailed in the table above are senior indebtedness.

At December 31, 2020, maturities of our debt were as follows: $0 in 2021 through 2024; $250 million in 2025; and $4.75 billion thereafter.

2020 Debt Issuances

In December 2020, we issued $300.0 million of our 3.95% senior notes due 2050. The notes, which are additional notes of the series originally issued in August 2019, were priced at 109.678% of par. Net proceeds from this offering were approximately $329.2 million after underwriting discounts and offering expenses, and including accrued interest. The net proceeds from this offering will be used for general partnership purposes, which may include repayment of indebtedness, including borrowings under our revolving credit facility and commercial paper program, capital expenditures and repurchases of our common units.

In May 2020, we issued $500.0 million of 3.25% senior notes due 2030 in an underwritten public

offering. The notes were issued at 99.88% of par. Net proceeds from this offering were approximately $495.2 million after underwriting discounts and offering expenses. The net proceeds from this offering, along with commercial paper borrowings and cash on hand, were used to redeem our $550.0 million senior notes due in 2021. We recognized $12.9 million of debt extinguishment costs that were recorded as interest expense in our consolidated statements of income related to this early redemption, partially offset by the recognition of a $0.7 million unamortized debt premium, for the year ended December 31, 2020.

Other Debt

Revolving Credit Facility. At December 31, 2020, the total borrowing capacity under our revolving credit facility maturing in May 2024 was $1.0 billion. Any borrowings outstanding under this facility are classified as long-term debt on our consolidated balance sheets. Borrowings under the facility are unsecured and bear interest at LIBOR plus a spread ranging from 0.875% to 1.500% based on our credit ratings. Additionally, an unused commitment fee is assessed at a rate from 0.075% to 0.200% depending on our credit ratings. The unused commitment fee was 0.125% at December 31, 2020. Borrowings under this facility may be used for general purposes, including capital expenditures. As of December 31, 2019 and 2020, there were no borrowings under this facility and $3.5 million was obligated for letters of credit. Amounts obligated for letters of credit are not reflected as debt on our consolidated balance sheets, but decrease our borrowing capacity under the facility.

Our revolving credit facility requires us to maintain a specified ratio of consolidated debt to EBITDA (as defined in the credit agreement) of no greater than 5.0 to 1.0. In addition, the revolving credit facility and the indentures under which our senior notes were issued contain covenants that limit our ability to, among other things, incur indebtedness secured by certain liens or encumber our assets, engage in certain sale-leaseback transactions and consolidate, merge or dispose of all or substantially all of our assets. We were in compliance with these covenants as of and during the year ended December 31, 2020.

Commercial Paper Program. We have a commercial paper program under which we may issue commercial paper notes in an amount up to the available capacity under our $1.0 billion revolving credit facility. The maturities of the commercial paper notes vary, but may not exceed 397 days from the date of issuance. Because the commercial paper we can issue is limited to amounts available under our revolving credit facility, amounts outstanding under the program are classified as long-term debt. The commercial paper notes are sold under customary terms in the commercial paper market and are issued at a discount from par, or alternatively, are sold at par and bear varying interest rates on a fixed or floating basis. The weighted-average interest rate for commercial paper borrowings based on the number of days outstanding was 2.6% and 0.4% for the year ended December 31, 2019 and 2020, respectively. There were no borrowings outstanding under this program at December 31, 2019 and 2020.

During the years ending December 31, 2018, 2019 and 2020, total cash payments for interest on all indebtedness, excluding the impact of related interest rate swap agreements, were $227.8 million, $217.1 million and $234.5 million, respectively.

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Leases

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Leases

LeasesWe have both lessee and lessor arrangements. Our leases are evaluated at inception or at any subsequent modification. Depending on the terms, leases are classified as either operating or finance leases if we are the lessee, or as operating, sales-type or direct financing leases if we are the lessor, as appropriate under ASC 842, Leases.  Our lessee arrangements primarily include a terminalling and storage contract where we have exclusive use of dedicated tankage, leased pipelines and office buildings. Our lessor arrangements include pipeline capacity and storage contracts and our condensate splitter tolling agreement that qualify as operating leases under ASC 842. In addition,

we have a long-term throughput and deficiency agreement with a customer that is being accounted for as a sales-type lease under ASC 842.

In accordance with ASC 842, we have made an accounting policy election to not apply the standard to lessee arrangements with a term of one year or less and no purchase option that is reasonably certain of exercise. We will continue to account for these short-term arrangements by recognizing payments and expenses as incurred, without recording a lease liability and right-of-use asset.

We have also made an accounting policy election for both our lessee and lessor arrangements to combine lease and non-lease components. This election is applied to all of our lease arrangements as our non-lease components do not result in significant timing differences in the recognition of rental expenses or income.

Operating Leases – Lessee

We recognize a lease liability for each lease based on the present value of remaining minimum fixed rental payments (which includes payments under any renewal option that we are reasonably certain to exercise), using a discount rate that approximates the rate of interest we would have to pay to borrow on a collateralized basis over a similar term. We also recognize a right-of-use asset for each lease, valued at the lease liability, adjusted for prepaid or accrued rent balances existing at the time of initial recognition. The lease liability and right-of-use asset are reduced over the term of the lease as payments are made and the assets are used.

Related Party Operating Lease. We entered into a long-term terminalling and storage contract with Seabrook for exclusive use of dedicated tankage that provides our customers with crude oil storage capacity and dock access for crude oil imports and exports on the Texas Gulf Coast.

Minimum fixed rental payments are recognized on a straight-line basis over the life of the lease as costs and expenses on our consolidated statements of income. Variable and short-term rental payments are recognized as costs and expenses as they are incurred. Variable payments consist of amounts that exceed the contractual minimum rental payment (for example, payment increases tied to a change in a market index). Future minimum rental payments under operating leases with initial terms greater than one year as of December 31, 2020 are as follows (in thousands):

	Third Party Leases		Seabrook Lease		All Leases
2021	$	20,463	$	12,701	$	33,164
2022	20,609		9,919		30,528
2023	20,854		9,919		30,773
2024	16,956		9,643		26,599
2025	16,250		6,612		22,862
Thereafter	18,541		24,246		42,787
Total future minimum rental payments	113,673		73,040		186,713
Present value discount	11,593		$	10,104	$	21,697
Total operating lease liability	$	102,080	$	62,936	$	165,016

The following tables provide further information about our operating leases (dollars in thousands):

	Year Ended 12/31/2019						Year Ended 12/31/2020
	Third Party Leases		Seabrook Lease		All Leases		Third Party Leases		Seabrook Lease		All Leases
Fixed lease expense	$	19,171	$	10,834	$	30,005	$	19,224	$	14,262	$	33,486
Short-term lease expense	1,603		—		1,603		1,334		—		1,334
Variable lease expense	3,058		15,017		18,075		4,105		14,854		18,959
Total lease expense	$	23,832	$	25,851	$	49,683	$	24,663	$	29,116	$	53,779

	As of and for the Year Ended
	December 31, 2019						December 31, 2020
	Third Party Leases		Seabrook Lease		All Leases		Third Party Leases		Seabrook Lease		All Leases
Current lease liability	$	15,136	$	11,085	$	26,221	$	17,099	$	10,434	$	27,533
Long-term lease liability	$	81,508	$	62,515	$	144,023	$	84,982	$	52,501	$	137,483
Right-of-use asset	$	98,268	$	73,600	$	171,868	$	103,142	$	62,936	$	166,078
Operating cash flows for operating leases	$	23,253	25,870		$	49,123	$	24,098	29,116		$	53,214
Weighted average remaining lease term (years)	6		8		7		6		7		7
Weighted-average discount rate	3.9%		4.0%		4.0%		3.7%		4.0%		3.8%

Rent expense was $42.1 million for the year ended December 31, 2018 and was recognized in accordance with ASC 840.

Operating Leases – Lessor

We recognize fixed rental income on a straight-line basis over the life of the lease as revenue on our consolidated statements of income. Variable rental payments are recognized as revenue in the period in which the circumstances on which the variable lease payments are based occur.

Future minimum payments receivable under operating leases with initial terms greater than one year as of December 31, 2020 are estimated as follows (in thousands):

2021	$	30,235
2022	21,322
2023	18,820
2024	18,562
2025	13,911
Thereafter	40,645
Total	$	143,495

We recognized variable lease revenue of $51.8 million, $58.4 million and $61.4 million, respectively, for the years ended December 31, 2018, 2019 and 2020, primarily related to our condensate splitter.

At December 31, 2020, property, plant and equipment utilized by our customers in operating lease arrangements consisted of: $226.4 million of processing equipment; $58.3 million of storage tanks; $48.7 million of pipeline and station equipment; and $30.5 million of other assets. The processing equipment primarily relates to our condensate splitter.

Sales-Type Lease – Lessor

We entered into a long-term throughput and deficiency agreement with a customer on a pipeline and related assets that we constructed in Texas and New Mexico, which contains minimum volume/payment commitments. Our customer has the option to purchase this pipeline and related assets at the end of the lease term for a nominal amount. This agreement is accounted for as a sales-type lease under ASC 842. The net investment under this arrangement as of December 31, 2019 and 2020 was as follows (in thousands):

	December 31, 2019		December 31, 2020
Total minimum lease payments receivable	$	15,721	$	13,974
Less: Unearned income	2,814		2,257
Recorded net investment in sales-type lease	$	12,907	$	11,717

The net investment in this sales-type lease was classified in the consolidated balance sheets as follows (in millions):

	December 31, 2019		December 31, 2020
Other accounts receivable	$	1,190	$	1,245
Long-term receivables	11,717		10,472
Total	$	12,907	$	11,717

Future minimum payments receivable under this sales-type lease for the next five years are $1.7 million each year with $5.3 million due thereafter.

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Employee Benefit Plans

12 Months Ended

Dec. 31, 2020

Retirement Benefits [Abstract]

Compensation and Employee Benefit Plans

Employee Benefit Plans

Our pension and postretirement benefit liabilities represent the funded status of the present value of benefit obligations of our employee benefit plans. We develop pension, postretirement medical and life benefit costs from third-party actuarial valuations. We establish actuarial assumptions to anticipate future events and use those assumptions when calculating the expense and liabilities related to these plans. These factors include assumptions management makes concerning expected investment return on plan assets, discount rates, health care costs trend rates, turnover rates and rates of future compensation increases, among others. In addition, we use subjective factors such as withdrawal and mortality rates to develop actuarial valuations. Management reviews and updates these assumptions on an annual basis. The actuarial assumptions that we use may differ from actual results due to changing market rates or other factors. These differences could affect the amount of pension and postretirement medical and life benefit expense we will recognize in future periods.

Defined Contribution Plan. We sponsor a defined contribution plan in which we match our employees’ qualifying contributions, resulting in additional expense to us. Expenses related to the defined contribution plan

were $11.0 million, $11.4 million and $12.2 million in 2018, 2019 and 2020, respectively.

Defined Benefit Plans. We sponsor two pension plans, including one for all non-union employees and one that covers union employees, and a postretirement benefit plan for certain employees. The annual measurement date of these plans is December 31.

The following table presents the changes in benefit obligations and plan assets for pension benefits and other postretirement benefits, as well as the end-of-period accumulated benefit obligation for the years ended December 31, 2019 and 2020 (in thousands):

	Pension Benefits				Other Postretirement Benefits
	2019		2020		2019		2020
Change in benefit obligations:
Benefit obligations at beginning of year	$	308,949	$	381,240	$	12,080	$	15,207
Service cost	25,406		27,736		193		258
Interest cost	12,163		10,989		507		479
Plan participants’ contributions	—		—		564		567
Actuarial loss	54,171		53,165		3,300		2,540
Benefits paid	(11,409)		(23,097)		(1,437)		(1,758)
Curtailment gain	—		(1,703)		—		—
Settlement payments	(8,040)		(4,685)		—		—
Benefit obligations at end of year	381,240		443,645		15,207		17,293
Change in plan assets:
Fair value of plan assets at beginning of year	197,590		249,293		—		—
Employer contributions	31,630		29,338		873		1,191
Plan participants’ contributions	—		—		564		567
Actual return on plan assets	39,522		43,560		—		—
Benefits paid	(11,409)		(23,097)		(1,437)		(1,758)
Settlement payments	(8,040)		(3,343)		—		—
Fair value of plan assets at end of year	249,293		295,751		—		—
Funded status at end of year	$	(131,947)	$	(147,894)	$	(15,207)	$	(17,293)
Accumulated benefit obligations	$	274,353	$	324,770

At December 31, 2019 and 2020, the accumulated benefit obligations of each of our plans exceeded the fair value of the related plans’ assets.

The pension plans actuarial loss in 2020 of $53.2 million is primarily due to the impact of decreases in the discount rates used to calculate the benefit obligations, partially offset by demographic changes. The pension benefit obligations experienced an actuarial loss of $54.2 million in 2019 primarily due to the impact of decreases in the discount rates used to calculate the benefit obligations, partially offset by changes in salary assumptions and higher asset returns.

The following table summarizes information for pension plans with obligations in excess of plan assets (in thousands):

	December 31,
	2019		2020
Plans with a projected benefit obligation in excess of plan assets:
Projected benefit obligation	$	381,240	$	443,645
Fair value of plan assets	$	249,293	$	295,751
Plans with an accumulated benefit obligation in excess of plan assets:
Accumulated benefit obligation	$	274,353	$	324,770
Fair value of plan assets	$	249,293	$	295,751

Amounts recognized in the consolidated balance sheets included in these financial statements were as follows (in thousands):

	Pension Benefits				Other Postretirement Benefits
	2019		2020		2019		2020
Amounts recognized in consolidated balance sheets:
Current accrued benefit cost	$	—	$	—	$	1,162	$	1,411
Long-term pension and benefits	131,947		147,894		14,045		15,882
	131,947		147,894		15,207		17,293
Accumulated other comprehensive loss:
Net actuarial loss	(107,625)		(120,487)		(8,378)		(10,409)
Prior service credit	2,886		2,705		—		—
	(104,739)		(117,782)		(8,378)		(10,409)
Net amount of liabilities and accumulated other comprehensive loss recognized in consolidated balance sheets	$	27,208	$	30,112	$	6,829	$	6,884

Net periodic benefit expense for the years ended December 31, 2018, 2019 and 2020 was as follows (in thousands): 

	Pension Benefits						Other Postretirement Benefits
	2018		2019		2020		2018		2019		2020
Components of net periodic pension and postretirement benefit expense:
Service cost	$	38,167	$	25,406	$	27,736	$	243	$	193	$	258
Interest cost	14,907		12,163		10,989		416		507		479
Expected return on plan assets	(12,090)		(9,401)		(11,354)		—		—		—
Amortization of prior service credit	(181)		(181)		(181)		—		—		—
Amortization of actuarial loss	9,763		5,489		5,425		589		331		509
Settlement cost	1,964		2,606		969		—		—		—
Settlement gain on disposition of assets	—		—		(1,342)		—		—		—
Net periodic expense	$	52,530	$	36,082	$	32,242	$	1,248	$	1,031	$	1,246

The service component of our net periodic benefit expense (credit) is presented in operating expense and G&A expense, and the non-service components are presented in other (income) expense in our consolidated statements of income.

Net periodic benefit expense for the year ended December 31, 2018 includes corrections of $19.4 million resulting from an error in our third-party actuary’s valuation of our pension liabilities and net periodic pension expense. In addition, long-term pension and benefits increased $22.2 million and accumulated other comprehensive loss increased $2.8 million in our 2018 consolidated balance sheets as a result of this valuation error.

Changes in plan assets and benefit obligations recognized in other comprehensive income (loss) during 2018, 2019 and 2020 were as follows (in thousands):

	Pension Benefits						Other Postretirement Benefits
	2018		2019		2020		2018		2019		2020
Beginning balance	$	(97,226)	$	(88,602)	$	(104,739)	$	(6,597)	$	(5,409)	$	(8,378)
Net actuarial gain (loss)	(2,922)		(24,051)		(20,959)		599		(3,300)		(2,540)
Amortization of prior service credit	(181)		(181)		(181)		—		—		—
Amortization of actuarial loss	9,763		5,489		5,425		589		331		509
Curtailment gain	—		—		1,703		—		—		—
Settlement cost	1,964		2,606		969		—		—		—
Amount recognized in other comprehensive loss	8,624		(16,137)		(13,043)		1,188		(2,969)		(2,031)
Ending balance	$	(88,602)	$	(104,739)	$	(117,782)	$	(5,409)	$	(8,378)	$	(10,409)

Actuarial gains and losses are amortized over the average future service period of the current active plan participants expected to receive benefits. The corridor approach is used to determine when actuarial gains and losses are to be amortized and is equal to 10% of the greater of the projected benefit obligation or the market related value of plan assets. The amount of gain or loss in excess of the calculated corridor is subject to amortization. The estimated net actuarial loss and prior service credit for the defined benefit pension plans that will be amortized from AOCL into net periodic benefit cost in 2021 are $6.2 million and $0.2 million, respectively. The estimated net actuarial loss for the other defined benefit postretirement plan that will be amortized from AOCL into net periodic benefit cost in 2021 is $0.6 million.

The weighted-average rate assumptions used to determine projected benefit obligations were as follows:

	Pension Benefits		Other Postretirement Benefits
	2019	2020	2019	2020
Discount rate	3.01%	2.23%	3.06%	2.30%
Rate of compensation increase	4.58%	4.53%	n/a	n/a
Cash balance interest crediting rate	2.16%	1.70%	n/a	n/a

The weighted-average rate assumptions used to determine net pension and other postretirement benefit plans expense were as follows:

	Pension Benefits			Other Postretirement Benefits
	For the Year Ended December 31,			For the Year Ended December 31,
	2018	2019	2020	2018	2019	2020
Discount rate	3.63%	3.98%	3.01%	3.43%	4.08%	3.06%
Rate of compensation increase	6.38%	6.48%	4.58%	n/a	n/a	n/a
Expected rate of return on plan assets	6.00%	6.00%	4.50%	n/a	n/a	n/a
Cash balance interest crediting rate	3.15%	2.78%	2.16%	n/a	n/a	n/a

The non-pension postretirement benefit plans provide for retiree contributions and contain other cost-sharing features such as deductibles and coinsurance. The accounting for these plans anticipates future cost sharing that is consistent with management’s expressed intent to increase the retiree contribution rate generally in line with health care cost increases.

The annual assumed rate of increase in the health care cost trend rate for 2021 is 6.0% decreasing systematically to 5.08% by 2028 for pre-65 year old participants.

The fair values of the pension plan assets at December 31, 2019 were as follows (in thousands):

Asset Category	Total		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Domestic Equity Securities:(1)
Small-cap fund	$	5,087	$	5,087	$	—	$	—
Mid-cap fund	5,095		5,095		—		—
Large-cap fund	40,884		40,884		—		—
International equity fund	25,580		25,580		—		—
Fixed Income Securities:(1)
Short-term bond fund	3,590		3,590		—		—
Intermediate-term bond fund	29,485		29,485		—		—
Long-term investment grade bond funds	132,096		132,096		—		—
Other:
Short-term investment fund	7,300		7,300		—		—
Group annuity contract	176		—		—		176
Fair value of plan assets	$	249,293	$	249,117	$	—	$	176

(1) We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated.

The fair values of the pension plan assets at December 31, 2020 were as follows (in thousands):

Asset Category	Total		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Domestic Equity Securities(1):
Small-cap fund	$	5,798	$	5,798	$	—	$	—
Mid-cap fund	5,853		5,853		—		—
Large-cap fund	47,598		47,598		—		—
International equity fund	29,876		29,876		—		—
Fixed Income Securities(1):
Short-term bond fund	4,209		4,209		—		—
Intermediate-term bond fund	34,894		34,894		—		—
Long-term investment grade bond funds	161,007		161,007		—		—
Other:
Short-term investment fund	6,354		6,354		—		—
Group annuity contract	162		—		—		162
Fair value of plan assets	$	295,751	$	295,589	$	—	$	162

(1) We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated.

As reflected in the tables above, Level 3 activity was not material.

The investment strategies for the various funds held as pension plan assets by asset category are as follows: 

Asset Category	Fund’s Investment Strategy
Domestic Equity Securities:
Small-cap fund	Seeks to track performance of the Center for Research in Security Prices (“CRSP”) US Small Cap Index
Mid-cap fund	Seeks to track performance of the CRSP US Mid Cap Index
Large-cap fund	Seeks to track performance of the Standard & Poor’s 500 Index
International equity fund	Seeks long-term growth of capital by investing 65% or more of assets in international equities
Fixed Income Securities:
Short-term bond fund	Seeks current income with limited price volatility through investment in primarily high quality bonds
Intermediate-term bond fund	Seeks moderate and sustainable level of current income by investing primarily in high quality fixed income securities with maturities from five to ten years
Long-term investment grade bond funds	Seek high and sustainable current income through investment primarily in long-term high grade bonds
Other:
Short-term investment fund	Invests in high quality short-term money market instruments issued by the U.S. Treasury
Group annuity contract	Earns interest quarterly equal to the effective yield of the 91-day U.S. Treasury bill

The expected long-term rate of return on plan assets was determined by combining a review of projected returns, historical returns of portfolios with assets similar to the current portfolios of the union and non-union pension plans and target weightings of each asset classification. Our investment objective for the assets within the

pension plans is to earn a return that meets or exceeds the growth of obligations that result from interest and changes in the discount rate, while avoiding excessive risk. Defined diversification goals are set in order to reduce the risk of wide swings in the market value from year to year, or of incurring large losses that may result from concentrated positions. As a result, our plan assets have no significant concentrations of credit risk. Additionally, liquidity risks are minimized because all of the funds that the plans have invested in are publicly traded. We evaluate risks based on the potential impact to the predictability of contribution requirements, probability of under-funding, expected risk-adjusted returns and investment return volatility. Funds are invested with multiple investment managers. Our liabilities are calculated using rates defined by the Pension Protection Act of 2006. Approximately 70% of the plans’ investments are allocated to fixed-income securities and invested to match the durations of the plans’ short, intermediate and long-term pension liabilities, with the amount invested in each duration reflecting that duration’s proportion of the plans’ liabilities. The remaining approximately 30% of the plans’ investments are allocated to equity securities.

The target allocation and actual weighted-average asset allocation percentages at December 31, 2019 and 2020 were as follows:

	2019		2020
	Actual	Target	Actual	Target
Equity securities	30%	30%	30%	30%
Fixed income securities	67%	67%	68%	67%
Other	3%	3%	2%	3%

As of December 31, 2020, the benefit amounts expected to be paid from plan assets through December 31, 2030 were as follows (in thousands): 

	Pension Benefits		Other Postretirement Benefits
2021	$	21,404	$	1,410
2022	$	17,855	$	1,275
2023	$	21,413	$	1,168
2024	$	22,878	$	1,016
2025	$	23,629	$	975
2026 through 2030	$	145,885	$	3,929

Contributions estimated to be paid by us into the plans in 2021 are $29.7 million and $1.4 million for the pension and other postretirement benefit plans, respectively.

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Long-Term Incentive Plan

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Long-Term Incentive Plan

Long-Term Incentive Plan

The compensation committee of our general partner’s board of directors administers our long-term incentive plan (“LTIP”) covering certain of our employees and the independent directors of our general partner. The LTIP primarily consists of phantom units and permits the grant of awards covering an aggregate of 11.9 million of our common units. The estimated units remaining available under the LTIP at December 31, 2020 totaled approximately 1.1 million. The awards include: (i) performance-based awards issued to certain officers and other key employees (“performance-based awards”), (ii) time-based awards issued to certain officers and other key employees (“time-based awards,” and together with performance-based awards, “employee awards”), and (iii) awards issued to independent members of our general partner’s board of directors (“director awards”) that may be deferred and if deferred may be paid in cash. All of the awards include distribution equivalent rights, except non-deferred director awards.

The LTIP requires employee awards to be settled in our common units, except the settlement of distribution equivalents, which we pay in cash. As a result, we classify employee awards as equity. Fair value for these awards is determined on the grant date, and we recognize this value as compensation expense ratably over the requisite service period, which is the vesting period of each award. The vesting period for employee awards is generally three years; however, certain awards have been issued with shorter vesting periods while others have vesting periods of up to four years. Because employee awards contain distribution equivalent rights, the fair value of our employee awards is based on the closing price of our units on the grant date.

Payouts for performance-based awards are subject to the attainment of a financial metric. Additionally, the 2018 and 2019 performance-based awards are subject to an adjustment for our total unitholder return (the “TUR adjustment”), and the fair value of these awards is adjusted for the fair value of the TUR adjustment. The financial metric for the performance-based awards is our distributable cash flow per unit excluding commodity-related activities for the last year of the three-year vesting period as compared to established threshold, target and stretch levels. The payouts for the performance-related component of the awards can range from 0% for results below threshold, up to 200% for actual results at stretch or above. The TUR adjustment is based on our total unitholder return at the end of the three-year vesting period of the awards in relation to the total unitholder returns of certain peer entities and can increase or decrease the payout of the award by as much as 50%. Payouts related to time-based awards are based solely on the completion of the requisite service period by the employee and contain no provisions that provide for a payout other than the original number of units awarded and the associated distribution equivalents.

Performance-based awards are subject to forfeiture if a participant’s employment is terminated for any reason other than for termination within two years of a change-in-control that occurs on an involuntary basis without cause or on a voluntary basis for good cause, or due to retirement, disability or death prior to the vesting date.  These awards can vest early under certain circumstances following a change in control. Time-based awards are subject to forfeiture if a participant’s employment is terminated for any reason other than retirement, death or disability prior to the vesting date, or as the result of certain other employment restrictions. If an employee award recipient retires, dies or becomes disabled prior to the end of the vesting period, the award is prorated based upon months of employment completed during the vesting period, and the award is settled shortly after the end of the vesting period.

Compensation expense for our equity awards is calculated as the number of unit awards less forfeitures, multiplied by the grant date fair value of those awards, multiplied by the percentage of the requisite service period completed at each period end, multiplied by the expected payout percentage, less previously-recognized compensation expense.

Non-deferred director awards are paid in units valued on the grant date, with compensation expense calculated as the number of units awarded multiplied by the fair value of those units at that date. We classify deferred director awards as liability awards because they may be settled in cash. Because deferred director awards have distribution

equivalent rights, the fair value of these awards equals the closing price of our units at the measurement date. Compensation expense for deferred director awards is calculated as the number of units awarded, multiplied by the fair value of those awards on the measurement date, less previously-recognized compensation expense. Director awards deferred prior to 2015 are paid in January of the year following the director’s resignation from the board of directors of our general partner or death.  Director awards deferred after January 1, 2015 are paid 60 days following the director’s death or resignation from the board of directors of our general partner.

Non-Vested Unit Awards

The following table includes the changes during the current fiscal year in the number of non-vested units that have been granted by the compensation committee. The amounts below do not include adjustments for above-target or below-target performance.

	Performance-Based Awards			Time-Based Awards			Total Awards
	Number of Unit Awards	Weighted-Average Fair Value		Number of Unit Awards	Weighted-Average Fair Value		Number of Unit Awards	Weighted-Average Fair Value
Non-vested units - 1/1/2020	379,904	$	69.14	260,316	$	63.92	640,220	$	67.02
Units granted during 2020	189,632	$	61.16	198,450	$	61.18	388,082	$	61.17
Units vested during 2020	(196,142)	$	73.79	(75,089)	$	70.50	(271,231)	$	72.88
Units forfeited during 2020	(33,230)	$	65.70	(30,133)	$	62.90	(63,363)	$	64.37
Non-vested units - 12/31/20	340,164	$	62.35	353,544	$	61.07	693,708	$	61.70

The table below summarizes the total non-vested unit awards outstanding, including estimated targeted financial performance adjustments, to determine our total equity-based liability accrual.

Grant Date	Non-Vested Unit Awards	Performance Adjustment to Unit Awards	Total Unit Award Accrual	Vesting Date	Unrecognized Compensation Expense (in millions)(a)
Performance-Based Awards:
2019 Awards	164,706	(82,353)	82,353	12/31/2021	$	1.7
2020 Awards	175,458	—	175,458	12/31/2022	7.0
Time-Based Awards:
2021 Vesting Date	170,837	—	170,837	12/31/2021	3.4
2022 Vesting Date	182,707	—	182,707	12/31/2022	7.6
Total	693,708	(82,353)	611,355		$	19.7

(a) Unrecognized compensation expense will be recognized over the remaining vesting period of the awards.

Weighted-Average Fair Value

The weighted-average fair value of awards granted during 2018, 2019 and 2020 was as follows:

	Performance-Based Awards			Time-Based Awards
	Number of Unit Awards	Weighted-Average Fair Value		Number of Unit Awards	Weighted-Average Fair Value
Units granted during 2018	218,923	$	73.80	83,564	$	71.03
Units granted during 2019	182,834	$	63.65	195,031	$	62.91
Units granted during 2020	189,632	$	61.16	198,450	$	61.18

Vested Unit Awards

The table below sets forth the numbers and values of units that vested in each of the three years ended December 31, 2020. The vested common units include adjustments for above-target financial and market performance.

Vesting Date	Vested Common Units	Fair Value of Unit Awards on Vesting Date (in millions)	Intrinsic Value of Unit Awards on Vesting Date (in millions)
12/31/2018	317,037	$22.1	$18.1
12/31/2019	436,629	$31.0	$27.5
12/31/2020	235,127	$15.2	$10.0

Cash Flow Effects of LTIP Settlements

The difference between the common units issued to the participants and the total number of unit awards vested primarily represents the tax withholdings associated with the award settlement, which we pay in cash.

Settlement Date	Number of Common Units Issued, Net of Tax Withholdings	Tax Withholdings and Other Cash Payments (in millions)	Employer Taxes (in millions)	Total Cash Payments (in millions)
January 2018	168,913	$9.3	$1.1	$10.4
January 2019	199,792	$9.8	$0.9	$10.7
January 2020	275,093	$14.7	$1.3	$16.0

Compensation Expense Summary

Equity-based incentive compensation expense for 2018, 2019 and 2020, primarily recorded as G&A expense on our consolidated statements of income, was as follows (in thousands):

	Year Ended December 31,
	2018		2019		2020
Performance awards	$	28,728	$	17,920	$	3,087
Time-based awards	3,325		6,092		8,898
Total	$	32,053	$	24,012	$	11,985

During 2020, LTIP expense related to performance awards vesting in 2020 and 2021 decreased, reflecting the impacts of COVID-19-related reductions in economic activity.

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Derivative Financial Instruments

12 Months Ended

Dec. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Derivative Financial Instruments

We use derivative instruments to manage market price risks associated with inventories, interest rates and certain forecasted transactions. For those instruments that qualify for hedge accounting, the accounting treatment depends on their intended use and their designation. We classify derivative financial instruments qualifying for hedge accounting treatment into two categories: (1) cash flow hedges and (2) fair value hedges. We execute cash flow hedges to hedge against the variability in cash flows related to a forecasted transaction and execute fair value hedges to hedge against the changes in the value of a recognized asset or liability. At the inception of a hedged transaction, we document the relationship between the hedging instrument and the hedged item, the risk management objectives and the methods used for assessing and testing hedge effectiveness. We also assess, both at the inception of the hedge and on an on-going basis, whether the derivatives that are used in our hedging transactions are highly effective in offsetting changes in cash flows or fair value of the hedged item. If we determine that a derivative originally designated as a cash flow or fair value hedge is no longer highly effective, we discontinue hedge accounting prospectively and record the change in the fair value of the derivative in current earnings. The changes in fair value of derivative financial instruments that are not designated as hedges for accounting purposes, which we refer to as economic hedges, are included in current earnings.

As part of our risk management process, we assess the creditworthiness of the financial and other institutions with which we execute financial derivatives. Such financial instruments involve the risk of non-performance by the counterparty, which could result in material losses to us.

Interest Rate Derivatives

We periodically enter into interest rate derivatives to hedge the fair value of debt or hedge against variability in

interest rates. For interest rate cash flow hedges, we record the unrealized gains or losses as an adjustment to other comprehensive income. The realized gains and losses from our cash flow hedges are recognized into earnings as an adjustment to our periodic interest expense over the life of the related debt issuance. For fair value hedges on long-term debt, we record the unrealized gains or losses as an adjustment to long-term debt, and realized amounts as an adjustment to our periodic interest expense. Adjustments resulting from discontinued hedges continue to be recognized in accordance with their historic hedging relationships.

In December 2020, upon issuance of an additional $300.0 million of 3.95% notes due 2050, we terminated and settled treasury lock agreements that we had previously entered into to protect against the variability of interest payments on this anticipated debt issuance for a gain of $1.0 million, which was included in our statements of cash flows as a net receipt on financial derivatives. These agreements were accounted for as cash flow hedges. The gain was recorded to other comprehensive income (loss) and will be recognized into earnings as an adjustment to our periodic interest expense over the term of the life of the associated notes.

In May 2020, upon issuance of $500.0 million of 3.25% notes due 2030, we terminated and settled treasury lock agreements that we had previously entered into to protect against the variability of interest payments on this anticipated debt issuance for a loss of $10.4 million, which was included in our statements of cash flows as a net payment on financial derivatives. These agreements were accounted for as cash flow hedges. The loss was recorded to other comprehensive income (loss) and will be recognized into earnings as an adjustment to our periodic interest expense over the term of the life of the associated notes.

In August 2019, upon issuance of our $500.0 million of 3.95% notes due 2050, we terminated and settled treasury lock agreements we had previously entered into to protect against the variability of interest payments on this anticipated debt issuance for a loss of $25.3 million, which was included in our statements of cash flows as a net payment on financial derivatives.  These agreements were accounted for as cash flow hedges. The loss was recorded to other comprehensive income (loss) and will be recognized into earnings as an adjustment to our periodic interest expense over the life of the associated notes.

In 2019, upon issuance of $500.0 million of 4.85% notes due 2049, we terminated and settled treasury lock agreements that we had previously entered into to protect against the variability of interest payments on this anticipated debt issuance for a loss of $8.0 million, which was included in our statements of cash flows as a net payment on financial derivatives. These agreements were accounted for as cash flow hedges. The loss was recorded to other comprehensive income (loss) and will be recognized into earnings as an adjustment to our periodic interest expense over the life of the associated notes.

During 2018, we terminated and settled $200.0 million of interest rate derivative agreements with cumulative gains of $24.6 million. These agreements were previously entered into to protect against the risk of variability of interest payments on debt we issued in 2019. These agreements were accounted for as cash flow hedges. The gains were recorded to other comprehensive income (loss) and will be recognized into earnings as an adjustment to our periodic interest expense over the life of the associated notes. These gains were also reported as a net receipt on financial derivatives in the financing activities of our consolidated statements of cash flows in 2018.

Commodity Derivatives

Our gas liquids blending activities produce gasoline, and we can reasonably estimate the timing and quantities of sales of these products. We use a combination of exchange-based commodities futures contracts and forward purchase and sale contracts to help manage commodity price changes and mitigate the risk of decline in the product margin realized from our gas liquids blending activities. Further, certain of our other commercial operations generate petroleum products, and we also use futures contracts to hedge against price changes for some of these commodities.

Forward physical purchase and sale contracts that qualify for and are elected as normal purchases and sales are accounted for using traditional accrual accounting, whereby changes in the mark-to-market values of such contracts are not recognized in income, rather the revenues and costs associated with such transactions are recognized during the period when commodities are physically delivered or received. Physical forward commodity contracts subject to this exception are evaluated for the probability of future delivery and are periodically tested once the forecasted period has passed to determine whether similar forward contracts are probable of physical delivery in the future.

We record the effective portion of the gains or losses for commodity-based contracts designated as fair value hedges as adjustments to the assets being hedged and the ineffective portions as well as amounts excluded from the assessment of hedge effectiveness as adjustments to other income or expense. We recognize the change in fair value of economic hedges that hedge against changes in the price of petroleum products that we expect to sell or purchase in the future currently in earnings as adjustments to product sales revenue, cost of product sales, or operating expenses, as applicable.

Our open futures contracts at December 31, 2020 were as follows:

Type of Contract/Accounting Methodology	Product Represented by the Contract and Associated Barrels	Maturity Dates
Futures - Economic Hedges	3.4 million barrels of refined products and crude oil	Between January 2021 and November 2022
Futures - Economic Hedges	0.1 million barrels of gas liquids	Between January and April 2021

Commodity Derivatives Contracts and Deposits Offsets

At December 31, 2019 and 2020, we had made margin deposits of $27.4 million and $34.2 million, respectively, for our futures contracts with our counterparties, which were recorded as current assets under commodity derivatives deposits on our consolidated balance sheets. We have the right to offset the combined fair values of our open futures contracts against our margin deposits under a master netting arrangement for each counterparty; however, we have elected to present the combined fair values of our open futures contracts separately from the related margin deposits on our consolidated balance sheets. Additionally, we have the right to offset the fair values of our futures contracts together for each counterparty, which we have elected to do, and we report the combined net balances on our consolidated balance sheets. A schedule of the derivative amounts we have offset and the deposit amounts we could offset under a master netting arrangement are provided below as of December 31, 2019 and 2020 (in thousands):

	Gross Amounts of Recognized Liabilities		Gross Amounts of Assets Offset in the Consolidated Balance Sheets		Net Amounts of Liabilities Presented in the Consolidated Balance Sheets		Margin Deposit Amounts Not Offset in the Consolidated Balance Sheets		Net Asset Amount(1)
As of December 31, 2019	$	(11,033)	$	811	$	(10,222)	$	27,415	$	17,193
As of December 31, 2020	$	(22,988)	$	1,690	$	(21,298)	$	34,165	$	12,867

(1) Amount represents the maximum loss we would incur if all of our counterparties failed to perform on their derivative contracts.

Basis Derivative Agreement

During 2019, we entered into a basis derivative agreement with a joint venture co-owner’s affiliate, and, contemporaneously, that affiliate entered into an intrastate transportation services agreement with the joint venture. Settlements under the basis derivative agreement are determined based on the basis differential of crude oil prices at different market locations and a notional volume of 30,000 barrels per day. As a result, we account for this agreement as a derivative. The agreement will expire in early 2022. We recognize the changes in fair value of this agreement based on forward price curves for crude oil in West Texas and the Houston Gulf Coast in other operating income (expense) in our consolidated statements of income. The liability for this agreement at December 31, 2019 and 2020, respectively, was $17.3 million and $10.2 million.

Impact of Derivatives on Our Financial Statements

Comprehensive Income

The changes in derivative activity included in AOCL for the years ended December 31, 2018, 2019 and 2020 were as follows (in thousands):

	Year Ended December 31,
Derivative Gains (Losses) Included in AOCL	2018		2019		2020
Beginning balance	$	(33,755)	$	(26,480)	$	(48,960)
Net gain (loss) on interest rate contract cash flow hedges	4,317		(25,216)		(9,484)
Reclassification of net loss on cash flow hedges to income	2,958		2,736		3,445
Ending balance	$	(26,480)	$	(48,960)	$	(54,999)

The following is a summary of the effect on our consolidated statements of income for the years ended December 31, 2018, 2019 and 2020 of derivatives that were designated as cash flow hedges (in thousands):

	Interest Rate Contracts
	Amount of Gain (Loss) Recognized in AOCL on  Derivatives			Location of Loss Reclassified from AOCL into Income	Amount of Loss Reclassified from AOCL into Income
Year Ended December 31, 2018		$	4,317	Interest expense		$	(2,958)
Year Ended December 31, 2019		$	(25,216)	Interest expense		$	(2,736)
Year Ended December 31, 2020		$	(9,484)	Interest expense		$	(3,445)

As of December 31, 2020, the net loss estimated to be classified to interest expense over the next twelve months from AOCL is approximately $3.3 million. This amount relates to the amortization of losses on interest rate contracts over the life of the related debt instruments.

The following table provides a summary of the effect on our consolidated statements of income for the years ended December 31, 2018, 2019 and 2020 of derivatives that were not designated as hedging instruments (in thousands):

		Amount of Gain (Loss) Recognized on Derivative
		Year Ended December 31,
Derivative Instrument	Location of Gain (Loss) Recognized on Derivatives	2018		2019		2020
Futures contracts	Product sales revenue	$	85,012	$	(72,562)	$	58,693
Futures contracts	Cost of product sales	(15,947)		(1,931)		2,183
Basis derivative agreement	Other operating income (expense)	—		(10,252)		(4,253)
	Total	$	69,065	$	(84,745)	$	56,623

The impact of the derivatives in the above table was reflected as cash from operations on our consolidated statements of cash flows.

Balance Sheets

The following tables provide a summary of the fair value of derivatives, which are presented on a net basis in our consolidated balance sheets, that were not designated as hedging instruments as of December 31, 2019 and 2020 (in thousands):

	December 31, 2019
	Asset Derivatives			Liability Derivatives
Derivative Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Futures contracts	Commodity derivatives contracts, net	$	811	Commodity derivatives contracts, net	$	11,033
Basis derivative agreement	Other current assets	—		Other current liabilities	8,457
Basis derivative agreement	Other noncurrent assets	—		Other noncurrent liabilities	8,847
	Total	$	811	Total	$	28,337
	December 31, 2020
	Asset Derivatives			Liability Derivatives
Derivative Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Futures contracts	Commodity derivatives contracts, net	$	616	Commodity derivatives contracts, net	$	22,988
Futures contracts	Other noncurrent assets	1,074		Other noncurrent liabilities	—
Basis derivative agreement	Other current assets	—		Other current liabilities	8,774
Basis derivative agreement	Other noncurrent assets	—		Other noncurrent liabilities	1,468
	Total	$	1,690	Total	$	33,230

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Fair Value Disclosures

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Disclosures

Fair Value Disclosures

Fair Value Methods and Assumptions - Financial Assets and Liabilities

The following methods and assumptions were used in estimating fair value for our financial assets and liabilities:

•Commodity derivatives contracts. These include exchange-traded futures contracts related to petroleum products. These contracts are carried at fair value on our consolidated balance sheets and are valued based on quoted prices in active markets. See Note 13 – Derivative Financial Instruments for further disclosures regarding these contracts.

•Basis Derivative Agreement. During 2019, we entered into a basis derivative agreement with a joint venture co-owner’s affiliate, and, contemporaneously, that affiliate entered into an intrastate transportation services agreement with the joint venture. Settlements under the basis derivative agreement are determined based on the basis differential of crude oil prices at different market locations and a notional volume of 30,000 barrels per day (see Note 13 - Derivative Financial Instruments for further disclosures regarding this agreement). The fair value of this derivative was calculated based on observable market data inputs, including published commodity pricing data and market interest rates. The key inputs in the fair value calculation include the forward price curves for crude oil, the implied forward correlation in crude oil prices between West Texas and the Houston Gulf Coast, and the implied forward volatility for crude oil futures contracts.

•Long-term receivables. These primarily include payments receivable under a sales-type leasing arrangement and cost reimbursement payments receivable. These receivables were recorded at

fair value on our consolidated balance sheets, using then-current market rates to estimate the present value of future cash flows.

•Guarantees and contractual obligations. At December 31, 2020, these primarily included a long-term contractual obligation we entered into in connection with the sale of our three marine terminals to a subsidiary of Buckeye Partners, L.P. (“Buckeye”). This obligation requires us to perform certain environmental remediation work on Buckeye’s behalf at the New Haven, Connecticut terminal.  The contractual obligation was recorded at fair value on our consolidated balance sheets upon initial recognition and was calculated using our best estimate of potential outcome scenarios to determine our liability for the remediation costs required in this agreement.

•Debt. The fair value of our publicly traded notes was based on the prices of those notes at December 31, 2019 and 2020; however, where recent observable market trades were not available, prices were determined using adjustments to the last traded value for that debt issuance or by adjustments to the prices of similar debt instruments of peer entities that are actively traded. The carrying amount of borrowings, if any, under our revolving credit facility and our commercial paper program approximates fair value due to the frequent repricing of these obligations.

Fair Value Measurements - Financial Assets and Liabilities

The following tables summarize the carrying amounts, fair values and fair value measurements recorded or disclosed as of December 31, 2019 and 2020, based on the three levels established by ASC 820; Fair Value Measurements and Disclosures (in thousands):

					Fair Value Measurements as of December 31, 2019 using:
Assets (Liabilities)	Carrying Amount		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Commodity derivatives contracts	$	(10,222)	$	(10,222)	$	(10,222)	$	—	$	—
Basis derivative agreement	$	(17,304)	$	(17,304)	$	—	$	(17,304)	$	—
Long-term receivables	$	20,782	$	20,782	$	—	$	—	$	20,782
Guarantees and contractual obligations	$	(408)	$	(408)	$	—	$	—	$	(408)
Debt	$	(4,706,075)	$	(5,192,685)	$	—	$	(5,192,685)	$	—

					Fair Value Measurements as of December 31, 2020 using:
Assets (Liabilities)	Carrying Amount		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Commodity derivatives contracts	$	(21,298)	$	(21,298)	$	(21,298)	$	—	$	—
Basis derivative agreement	$	(10,242)	$	(10,242)	$	—	$	(10,242)	$	—
Long-term receivables	$	22,755	$	22,755	$	—	$	—	$	22,755
Guarantees and contractual obligations	$	(11,207)	$	(11,207)	$	—	$	—	$	(11,207)
Debt	$	(4,978,691)	$	(5,880,850)	$	—	$	(5,880,850)	$	—

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Certain conditions may exist as of the date our consolidated financial statements are issued that could result in a loss to us, but which will only be resolved when one or more future events occur or fail to occur. Our management assesses such contingent liabilities, which inherently involves significant judgment. In assessing loss contingencies related to legal proceedings that are pending against us or for unasserted claims that may result in proceedings, our management, with input from legal counsel, evaluates the perceived merits of any legal proceedings or unasserted claims as well as the perceived merits of the amount of relief sought or expected to be sought therein.

Environmental expenditures are charged to operating expense or capitalized based on the nature of the expenditures. Environmental expenditures that meet the capitalization criteria for property, plant and equipment, as well as costs that mitigate or prevent environmental contamination that has yet to occur, are capitalized. We expense expenditures that relate to an existing condition caused by past operations. We initially record environmental liabilities assumed in a business combination at fair value; otherwise, we record environmental liabilities on an undiscounted basis. We recognize liabilities for other commitments and contingencies when, after analyzing the available information, we determine it is probable that an asset has been impaired, or that a liability has been incurred and the amount of impairment or loss can be reasonably estimated. When we can estimate a range of probable loss, we accrue the most likely amount within that range, or if no amount is more likely than another, we accrue the minimum of the range of probable loss. We expense legal costs associated with loss contingencies as incurred.

We record environmental liabilities independently of any potential claim for recovery. Accruals related to environmental matters are generally determined based on site-specific plans for remediation, taking into account currently available facts, existing technologies and presently enacted laws and regulations. Accruals for environmental matters reflect our prior remediation experience and include an estimate for costs such as fees paid to contractors, outside engineering and consulting firms. Accruals for estimated losses from environmental remediation obligations generally are recognized no later than completion of the remediation feasibility study. Such accruals are adjusted as further information develops or circumstances change.

We maintain specific insurance coverage, which may cover all or portions of certain environmental expenditures less a deductible. We recognize receivables in cases where we consider the realization of reimbursements of remediation costs as probable. We would sustain losses to the extent of amounts we have recognized as environmental receivables if the counterparties to those transactions were unable to perform their obligations to us.

The determination of the accrual amounts recorded for environmental liabilities includes significant judgments and assumptions made by management. The use of alternate judgments and assumptions could result in the recognition of different levels of environmental remediation costs.

Butane Blending Patent Infringement Proceeding

On October 4, 2017, Sunoco Partners Marketing & Terminals L.P. (“Sunoco”) brought an action for patent infringement in the U.S. District Court for the District of Delaware alleging Magellan Midstream Partners, L.P. (“Magellan”) and Powder Springs Logistics, LLC (“Powder Springs”) have infringed patents relating to butane blending at the Powder Springs facility located in Powder Springs, Georgia. Sunoco subsequently submitted pleadings alleging that Magellan is also infringing various patents related to butane blending at nine Magellan facilities, in addition to Powder Springs. Sunoco is seeking monetary damages, attorneys’ fees and a permanent injunction enjoining Magellan and Powder Springs from infringing the subject patents. We deny and are vigorously defending against all claims asserted by Sunoco. Although it is not possible to predict the ultimate outcome, we

believe the ultimate resolution of this matter will not have a material adverse impact on our results of operations, financial position or cash flows.

Environmental Liabilities

Liabilities recognized for estimated environmental costs were $14.9 million and $14.3 million at December 31, 2019 and December 31, 2020, respectively. We have classified environmental liabilities as other current or noncurrent based on management’s estimates regarding the timing of actual payments. Environmental expenses recognized as a result of changes in our environmental liabilities are included in operating expenses on our consolidated statements of income. Environmental expenses were $15.0 million, $4.4 million and $3.8 million for the years ended December 31, 2018, 2019 and 2020, respectively.

Other

In 2020, we entered into a long-term contractual obligation in connection with the sale of three marine terminals to Buckeye.  This obligation requires us to perform certain environmental remediation work on Buckeye’s behalf at the New Haven terminal.  As of December 31, 2020, our consolidated balance sheets reflected a current liability of $0.6 million and a noncurrent liability of $10.2 million to reflect the fair value of this obligation.

We have entered into an agreement to guarantee our 50% pro rata share, up to $25.0 million, of obligations under Powder Springs’ credit facility. As of December 31, 2020, our consolidated balance sheets reflected a $0.4 million other current liability and a corresponding increase in our investment in non-controlled entities on our consolidated balance sheets to reflect the fair value of this guarantee.

We and the non-controlled entities in which we own an interest are a party to various other claims, legal actions and complaints. While the results cannot be predicted with certainty, management believes the ultimate resolution of these claims, legal actions and complaints after consideration of amounts accrued, insurance coverage or other indemnification arrangements will not have a material adverse effect on our results of operations, financial position or cash flows.

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Major Customers and Concentration Of Risks

12 Months Ended

Dec. 31, 2020

Major Customers and Concentration Of Risks [Abstract]

Major Customers and Concentration Of Risks

Concentration of Risks

We transport, store and distribute petroleum products for refiners, producers, marketers, traders and end users of those products. Our revenue producing activities are concentrated in the central U.S. Concentrations of customers may affect our overall credit risk as our customers may be similarly affected by changes in economic, regulatory or other factors. We generally secure transportation and storage revenue with warehouseman’s liens. We periodically evaluate the financial condition and creditworthiness of our customers and require additional security as we deem necessary.

As of December 31, 2020, we had 1,720 employees, primarily concentrated in the central and Gulf Coast regions of the U.S. There were 934 employees assigned to our refined products segment, 253 employees assigned to our crude oil segment and 533 employees assigned to provide G&A services.  Approximately 13% of our employees are represented by the United Steel Workers and covered by a collective bargaining agreement that expires in January 2022.

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Related Party Transactions	12 Months Ended
	Dec. 31, 2020
Related Party Transactions [Abstract]
Related Party Transactions	Related Party TransactionsStacy Methvin is an independent member of our general partner’s board of directors and is also a director of one of our customers.  We received tariff, terminalling and other ancillary revenue from this customer of $21.7 million, $29.6 million and $37.4 million for the periods ending December 31, 2018, 2019 and 2020, respectively. We recorded a receivable of $3.8 million and $3.9 million from this customer at December 31, 2019 and 2020, respectively.  We also made a one-time payment of $0.2 million in 2019 to a subsidiary of this customer for an easement related to one of our expansion projects. Additionally, we received storage and other miscellaneous revenue of $0.5 million for the period ending December 31, 2020 from a subsidiary of a separate company for which Stacy Methvin serves as a director.See Note 6 – Investments in Non-Controlled Entities for a discussion of transactions with our joint venture affiliates.

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Partners' Capital and Distributions

12 Months Ended

Dec. 31, 2020

Partners' Capital Notes [Abstract]

Partners' Capital and Distributions

Partners’ Capital and Distributions

Partners’ Capital

Our general partner’s board of directors authorized the repurchase of up to $750 million of our common units through 2022. The timing, price and actual number of common units repurchased will depend on a number of factors including our expected expansion capital spending needs, excess cash available, balance sheet metrics, legal and regulatory requirements, market conditions and the trading price of our common units. The repurchase program does not obligate us to acquire any particular amount of common units, and the repurchase program may be suspended or discontinued at any time.

The following table details the changes in the number of our common units outstanding from January 1, 2018 through December 31, 2020:

Common units outstanding on January 1, 2018	228,024,556
January 2018—Settlement of employee LTIP awards	168,913
During 2018—Other(a)	1,691
Common units outstanding on December 31, 2018	228,195,160
February 2019—Settlement of employee LTIP awards	199,792
During 2019—Other(a)	8,476
Common units outstanding on December 31, 2019	228,403,428
Units repurchased during 2020	(5,568,260)
February 2020—Settlement of employee LTIP awards	275,093
During 2020—Other(a)	9,550
Common units outstanding on December 31, 2020	223,119,811

(a)Common units issued to settle the equity-based retainer paid to independent directors of our general partner.

Our partnership agreement allows us to issue additional partnership securities for any partnership purpose at any time and from time to time for consideration and on terms and conditions as our general partner determines, all without approval by our unitholders.

Common unitholders have the following rights, among others:

•right to receive distributions of our available cash within 45 days after the end of each quarter;

•right to elect the board members of our general partner;

•right to remove Magellan GP, LLC as our general partner upon a 100% vote of outstanding unitholders;

•right to transfer common unit ownership to substitute common unitholders;

•right to receive an annual report, containing audited financial statements and a report on those financial statements by our independent public accountants, within 120 days after the close of the fiscal year end;

•right to receive information reasonably required for tax reporting purposes within 90 days after the close of the calendar year;

•right to vote according to the unitholder’s percentage interest in us at any meeting that may be called by our general partner; and

•right to inspect our books and records at the unitholder’s own expense.

In the event of liquidation, we would distribute all property and cash in excess of that required to discharge all liabilities to the unitholders in proportion to the positive balances in their respective capital accounts. The common unitholders’ liability is generally limited to their investment.

Distributions

Distributions we paid during 2018, 2019 and 2020 were as follows (in thousands, except per unit amount):

Payment Date	Per Unit Distribution Amount		Total Distribution
2/14/2018	$	0.9200	$	209,940
5/15/2018	0.9375		213,933
8/14/2018	0.9575		218,497
11/14/2018	0.9775		223,061
Total	$	3.7925	$	865,431
2/14/2019	$	0.9975	$	227,832
5/15/2019	1.0050		229,545
8/14/2019	1.0125		231,258
11/14/2019	1.0200		232,971
Total	$	4.0350	$	921,606
2/14/2020	$	1.0275	$	234,774
5/15/2020	1.0275		231,245
8/14/2020	1.0275		231,245
11/13/2020	1.0275		229,853
Total	$	4.1100	$	927,117

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Subsequent Events

12 Months Ended

Dec. 31, 2020

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

Recognizable events

No recognizable events have occurred subsequent to December 31, 2020.

Non-recognizable eventsOn February 12, 2021, we paid distributions of $1.0275 per unit on our outstanding common units to unitholders of record at the close of business on February 5, 2021.

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Summary of Significant Accounting Policies (Policy)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation. Our consolidated financial statements include our refined products and crude oil operating segments. We consolidate all entities in which we have a controlling ownership interest. We apply the equity method of accounting to investments in entities over which we exercise significant influence but do not control. We eliminate all intercompany transactions.

Use Of Estimates

Use of Estimates. The preparation of our consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities that exist at the date of our consolidated financial statements, as well as their impact on the reported amounts of revenue and expense during the reporting periods. Actual results could differ from those estimates.

Cash Equivalents

Cash Equivalents. Cash and cash equivalents include demand and time deposits and funds that own highly marketable securities with original maturities of three months or less when acquired. We periodically assess the financial condition of the institutions where we hold these funds, and, at December 31, 2019 and 2020, we believed our credit risk relative to these funds was minimal.

Restricted Cash

Restricted Cash. Restricted cash includes cash that we are contractually required to use for the construction of fixed assets and is unavailable for general use. It is classified as noncurrent due to its designation to be used for the construction of noncurrent assets.

Accounts Receivable And Allowance For Doubtful Accounts

Accounts Receivable and Allowance for Doubtful Accounts. Accounts receivable represent valid claims against customers. We recognize accounts receivable when we sell products or render services and collection of the receivable is probable. We extend credit terms to certain customers after a review of various credit indicators. We establish an allowance for doubtful accounts using an expected credit loss approach and evaluate reserves no less than quarterly to determine their adequacy. Judgments relative to at-risk accounts include the customers’ current financial condition, the customers’ historical relationship with us and current and projected economic conditions. We write off accounts receivable when we deem an account uncollectible.

Pipeline Over/Short Product

Product Overages and Shortages. Each period end we measure the volume of each type of product in our pipeline systems and terminals, which is compared to the volumes of our customers’ inventories (as adjusted for tender deductions).  To the extent the product volumes in our pipeline systems and terminals exceed the volumes of our customers’ book inventories, we recognize a gain from the product overage and increase our product inventories. To the extent the product in our pipeline systems and terminals is less than our customers’ book inventories, we recognize a loss from the product shortage and we record a liability for product owed to our customers.  The product overages we recognize are recorded based on market prices, and the resulting inventory is carried at weighted average cost.  The product shortages we recognize are recorded based on our weighted average cost.  Additionally, when product shortages result in a net short inventory position, the related liability is recorded based on period-end market prices.  Product overages and shortages as well as adjustments to the value of net short inventory positions are recorded in operating expenses on our consolidated statements of income.

Income Taxes

Income Taxes. We are a partnership for income tax purposes and therefore are not subject to federal or state income taxes for most of the states in which we operate. The tax on our net income is borne by our unitholders through allocation to them of their share of taxable income. Net income for financial statement purposes may differ significantly from taxable income of unitholders because of differences between the tax basis and financial reporting basis of assets and liabilities and the taxable income allocation requirements under our partnership agreement. The aggregate difference in the basis of our net assets for financial and tax reporting purposes cannot be readily determined because information regarding each unitholder’s tax attributes is not available to us.

The amounts recognized as provision for income taxes in our consolidated statements of income are primarily

comprised of partnership-level taxes levied by the state of Texas. This tax is based on revenues less direct costs of sale for our assets apportioned to the state of Texas.

Net Income Per Unit

Net Income Per Unit. We calculate basic net income per common unit for each period by dividing net income by the weighted-average number of common units outstanding. The difference between our actual common units outstanding and our weighted-average number of common units outstanding used to calculate net income per common unit is due to the impact of: (i) the phantom units issued to our independent directors, which are included in the calculation of basic and diluted weighted average units outstanding, and (ii) the weighted-average effect of units actually issued or repurchased during a period.  The difference between the weighted-average number of common units outstanding used for basic and diluted net income per unit calculations on our consolidated statements of income is primarily the dilutive effect of phantom unit awards granted pursuant to our long-term incentive plan, which have not yet vested in periods where contingent performance metrics have been met.

New Accounting Pronouncements

New Accounting PronouncementsIn June 2016, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments - Credit Losses (Topic 326). The new guidance is effective for reporting periods beginning after December 15, 2019. The standard replaces the incurred loss impairment methodology under current GAAP with a methodology that reflects expected credit losses and requires the use of a forward-looking expected credit loss model for accounts receivables, loans and other financial instruments. The standard requires a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. We adopted the new guidance as of January 1, 2020 using the modified retrospective approach related to our accounts receivables and contract assets, resulting in no cumulative adjustment to retained earnings. The adoption of this guidance did not have a material impact on our consolidated statements of income for the year ended December 31, 2020.

Revenue

Revenue is recognized upon the satisfaction of each performance obligation required by our customer contracts. Transportation and terminals revenue is recognized over time as our customers receive the benefits of our service as it is performed on their behalf using an output method based on actual deliveries. Revenue for our storage services is recognized over time using an output method based on the capacity of storage under contract with our customers. Product sales revenue is recognized at a point in time when our customers take control of the commodities purchased. We record back-to-back purchases and sales of petroleum products on a net basis.

We recognize pipeline transportation revenue for crude oil shipments when our customers’ product arrives at the customer-designated destination.  For shipments of refined products under published tariffs that combine transportation and terminalling services, we recognize revenue when our customers take delivery of their product from our system. For shipments where terminalling services are not included in the tariff, we recognize revenue when our customers’ product arrives at the customer-designated destination. We have certain contracts that require counterparties to ship a minimum volume over an agreed-upon time period, which are contracted as minimum dollar or volume commitments. Revenue pursuant to these take-or-pay contracts is recognized when the customers utilize their committed volumes. Additionally, when we estimate that the customers will not utilize all or a portion of their committed volumes, we recognize revenue in proportion to the pattern of exercised rights for the respective commitment period.

Our interstate common carrier petroleum products pipeline operations are subject to rate regulation by the Federal Energy Regulatory Commission (“FERC”) under the Interstate Commerce Act, the Energy Policy Act of 1992 and rules and orders promulgated pursuant thereto. FERC regulation requires that interstate pipeline rates be filed with the FERC, be posted publicly and be nondiscriminatory and “just and reasonable.” The rates on approximately 40% of the shipments on our refined products pipeline system are regulated by the FERC primarily through an index methodology. As an alternative to cost-of-service or index-based rates, interstate pipeline companies may establish rates by obtaining authority to charge market-based rates in competitive markets or by negotiation with unaffiliated shippers. Approximately 60% of our refined products pipeline system’s markets are either subject to regulations by the states in which we operate or are approved for market-based rates by the FERC, and in both cases these rates can generally be adjusted at our discretion based on market factors. Most of the tariffs on our crude oil pipelines are established by negotiated rates that generally provide for annual adjustments in line with changes in the FERC index, subject to certain modifications.

For both our index-based rates and our market-based rates, our published tariffs serve as contracts, and shippers nominate the volume to be shipped up to a month in advance.  These tariffs include provisions which allow us to deduct from our customer’s inventory a small percentage of the products our customers transport on our pipeline systems. We refer to this non-monetary consideration as tender deduction revenue.  We receive tender deductions from our customers as consideration for product losses during the transportation of petroleum products within our pipeline systems.  Tender deduction revenue is generally recognized as transportation revenue when the customer's transported commodities reach their destination and is recorded at the fair value of the product received on the date received or the contract date, as applicable.

Product sales revenue pricing is contractually specified, and we have determined that each barrel sold represents a separate performance obligation. Transaction prices for our other services including terminalling, storage and ancillary services are typically contracted as a single performance obligation with our customers. In circumstances where multiple performance obligations are contractually required, we allocate the transaction price to the various performance obligations based on their relative standalone selling price.

Property, Plant and Equipment

Property, plant and equipment consist primarily of pipeline, pipeline-related equipment, storage tanks and processing equipment. We state property, plant and equipment at cost except for certain acquired assets recorded at fair value on their respective acquisition dates and impaired assets. We record impaired assets at fair value on the last impairment evaluation date for which an adjustment was required.

We assign asset lives based on reasonable estimates when we place an asset into service. Subsequent events could cause us to change our estimates, which would affect the future calculation of depreciation expense.

When we sell or retire property, plant and equipment, we remove its carrying value and the related accumulated depreciation from our accounts and record any associated gains or losses on our consolidated statements of income in the period of sale or disposition.

We capitalize expenditures to replace existing assets and retire the replaced assets. We capitalize expenditures when they extend the useful life, increase the productivity or capacity or improve the safety or efficiency of the asset. We capitalize direct project costs such as labor and materials as incurred. Indirect project costs, such as overhead, are capitalized based on a percentage of direct labor charged to the respective capital project. We charge expenditures for maintenance, repairs and minor replacements to operating expense in the period incurred.

During construction, we capitalize interest on all construction projects requiring a completion period of three months or longer and total project costs exceeding $0.5 million. The interest we capitalize is based on the weighted-average interest rate of our debt.

Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]

Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. In reviewing for impairment, the carrying value of such assets is compared to the estimated undiscounted future cash flows expected from the use of the assets and their eventual disposition. If such cash flows are not sufficient to support the asset’s recorded value, an impairment charge is recognized to reduce the carrying value of the long-lived asset to its estimated fair value. The determination of future cash flows as well as the estimated fair value of long-lived assets involves significant estimates on the part of management.

Goodwill and Intangible Assets, Goodwill

We record the excess of purchase price over the fair value of the tangible and identifiable intangible assets acquired and liabilities assumed in a business acquisition (or combination) as goodwill. The goodwill relating to each of our reporting units is tested for impairment annually as well as when an event or change in circumstances indicates an impairment may have occurred.For purposes of performing the impairment test for goodwill, our reporting units are our refined products and crude oil segments.

Intangible Assets, Finite-Lived

Other intangible assets with finite lives are amortized over their estimated useful lives of seven years up to 30 years. The weighted-average asset life of our other intangible assets at December 31, 2020 was approximately 18 years. We adjust the useful lives of our other intangible assets if events or circumstances indicate there has been a change in the remaining useful lives. We eliminate from our balance sheets the gross carrying amount and the related accumulated amortization for any fully amortized intangibles in the year they are fully amortized.

Investments in Non-Controlled Entities

We account for interests in affiliates that we do not control using the equity method of accounting. Under this method, an investment is recorded at our acquisition cost or capital contributions, as adjusted by contractual terms, plus equity in earnings or losses since acquisition or formation, plus interest capitalized, less distributions received and amortization of interest capitalized and excess net investment. Excess net investment is the amount by which our investment in a non-controlled entity exceeded our proportionate share of the book value of the net assets of that investment. We amortize excess net investment over the weighted-average depreciable asset lives of the equity investee. Our unamortized excess net investment was $33.9 million and $33.0 million at December 31, 2019 and 2020, respectively. The amount of unamortized excess investment is primarily related to our investment in BridgeTex. We evaluate equity method investments for impairment whenever events or circumstances indicate that there is an other-than-temporary loss in value of the investment. In the event that we determine that the loss in value of an investment is other-than-temporary, we would record a charge to earnings to adjust the carrying value to fair value. We recognized no equity investment impairments during 2018, 2019 and 2020.

Inventory

Inventory is comprised primarily of refined products, liquefied petroleum gases, transmix, crude oil and additives, which are stated and relieved at the lower of average cost or net realizable value.

Lease Policy, Lessee and Lessor [Policy Text Block]

We have both lessee and lessor arrangements. Our leases are evaluated at inception or at any subsequent modification. Depending on the terms, leases are classified as either operating or finance leases if we are the lessee, or as operating, sales-type or direct financing leases if we are the lessor, as appropriate under ASC 842, Leases.  Our lessee arrangements primarily include a terminalling and storage contract where we have exclusive use of dedicated tankage, leased pipelines and office buildings. Our lessor arrangements include pipeline capacity and storage contracts and our condensate splitter tolling agreement that qualify as operating leases under ASC 842. In addition,

we have a long-term throughput and deficiency agreement with a customer that is being accounted for as a sales-type lease under ASC 842.

In accordance with ASC 842, we have made an accounting policy election to not apply the standard to lessee arrangements with a term of one year or less and no purchase option that is reasonably certain of exercise. We will continue to account for these short-term arrangements by recognizing payments and expenses as incurred, without recording a lease liability and right-of-use asset.

We have also made an accounting policy election for both our lessee and lessor arrangements to combine lease and non-lease components. This election is applied to all of our lease arrangements as our non-lease components do not result in significant timing differences in the recognition of rental expenses or income.

Lessee, Leases [Policy Text Block]

We recognize a lease liability for each lease based on the present value of remaining minimum fixed rental payments (which includes payments under any renewal option that we are reasonably certain to exercise), using a discount rate that approximates the rate of interest we would have to pay to borrow on a collateralized basis over a similar term. We also recognize a right-of-use asset for each lease, valued at the lease liability, adjusted for prepaid or accrued rent balances existing at the time of initial recognition. The lease liability and right-of-use asset are reduced over the term of the lease as payments are made and the assets are used.

Related Party Operating Lease. We entered into a long-term terminalling and storage contract with Seabrook for exclusive use of dedicated tankage that provides our customers with crude oil storage capacity and dock access for crude oil imports and exports on the Texas Gulf Coast.

Minimum fixed rental payments are recognized on a straight-line basis over the life of the lease as costs and expenses on our consolidated statements of income. Variable and short-term rental payments are recognized as costs and expenses as they are incurred. Variable payments consist of amounts that exceed the contractual minimum rental payment (for example, payment increases tied to a change in a market index).

Pension And Postretirement Medical And Life Benefit Obligations

Our pension and postretirement benefit liabilities represent the funded status of the present value of benefit obligations of our employee benefit plans. We develop pension, postretirement medical and life benefit costs from third-party actuarial valuations. We establish actuarial assumptions to anticipate future events and use those assumptions when calculating the expense and liabilities related to these plans. These factors include assumptions management makes concerning expected investment return on plan assets, discount rates, health care costs trend rates, turnover rates and rates of future compensation increases, among others. In addition, we use subjective factors such as withdrawal and mortality rates to develop actuarial valuations. Management reviews and updates these assumptions on an annual basis. The actuarial assumptions that we use may differ from actual results due to changing market rates or other factors. These differences could affect the amount of pension and postretirement medical and life benefit expense we will recognize in future periods.

Equity-Based Incentive Compensation Awards

The compensation committee of our general partner’s board of directors administers our long-term incentive plan (“LTIP”) covering certain of our employees and the independent directors of our general partner. The LTIP primarily consists of phantom units and permits the grant of awards covering an aggregate of 11.9 million of our common units. The estimated units remaining available under the LTIP at December 31, 2020 totaled approximately 1.1 million. The awards include: (i) performance-based awards issued to certain officers and other key employees (“performance-based awards”), (ii) time-based awards issued to certain officers and other key employees (“time-based awards,” and together with performance-based awards, “employee awards”), and (iii) awards issued to independent members of our general partner’s board of directors (“director awards”) that may be deferred and if deferred may be paid in cash. All of the awards include distribution equivalent rights, except non-deferred director awards.

The LTIP requires employee awards to be settled in our common units, except the settlement of distribution equivalents, which we pay in cash. As a result, we classify employee awards as equity. Fair value for these awards is determined on the grant date, and we recognize this value as compensation expense ratably over the requisite service period, which is the vesting period of each award. The vesting period for employee awards is generally three years; however, certain awards have been issued with shorter vesting periods while others have vesting periods of up to four years. Because employee awards contain distribution equivalent rights, the fair value of our employee awards is based on the closing price of our units on the grant date.

Payouts for performance-based awards are subject to the attainment of a financial metric. Additionally, the 2018 and 2019 performance-based awards are subject to an adjustment for our total unitholder return (the “TUR adjustment”), and the fair value of these awards is adjusted for the fair value of the TUR adjustment. The financial metric for the performance-based awards is our distributable cash flow per unit excluding commodity-related activities for the last year of the three-year vesting period as compared to established threshold, target and stretch levels. The payouts for the performance-related component of the awards can range from 0% for results below threshold, up to 200% for actual results at stretch or above. The TUR adjustment is based on our total unitholder return at the end of the three-year vesting period of the awards in relation to the total unitholder returns of certain peer entities and can increase or decrease the payout of the award by as much as 50%. Payouts related to time-based awards are based solely on the completion of the requisite service period by the employee and contain no provisions that provide for a payout other than the original number of units awarded and the associated distribution equivalents.

Performance-based awards are subject to forfeiture if a participant’s employment is terminated for any reason other than for termination within two years of a change-in-control that occurs on an involuntary basis without cause or on a voluntary basis for good cause, or due to retirement, disability or death prior to the vesting date.  These awards can vest early under certain circumstances following a change in control. Time-based awards are subject to forfeiture if a participant’s employment is terminated for any reason other than retirement, death or disability prior to the vesting date, or as the result of certain other employment restrictions. If an employee award recipient retires, dies or becomes disabled prior to the end of the vesting period, the award is prorated based upon months of employment completed during the vesting period, and the award is settled shortly after the end of the vesting period.

Compensation expense for our equity awards is calculated as the number of unit awards less forfeitures, multiplied by the grant date fair value of those awards, multiplied by the percentage of the requisite service period completed at each period end, multiplied by the expected payout percentage, less previously-recognized compensation expense.

Non-deferred director awards are paid in units valued on the grant date, with compensation expense calculated as the number of units awarded multiplied by the fair value of those units at that date. We classify deferred director awards as liability awards because they may be settled in cash. Because deferred director awards have distribution

equivalent rights, the fair value of these awards equals the closing price of our units at the measurement date. Compensation expense for deferred director awards is calculated as the number of units awarded, multiplied by the fair value of those awards on the measurement date, less previously-recognized compensation expense. Director awards deferred prior to 2015 are paid in January of the year following the director’s resignation from the board of directors of our general partner or death.  Director awards deferred after January 1, 2015 are paid 60 days following the director’s death or resignation from the board of directors of our general partner.

Derivative Financial Instruments

We use derivative instruments to manage market price risks associated with inventories, interest rates and certain forecasted transactions. For those instruments that qualify for hedge accounting, the accounting treatment depends on their intended use and their designation. We classify derivative financial instruments qualifying for hedge accounting treatment into two categories: (1) cash flow hedges and (2) fair value hedges. We execute cash flow hedges to hedge against the variability in cash flows related to a forecasted transaction and execute fair value hedges to hedge against the changes in the value of a recognized asset or liability. At the inception of a hedged transaction, we document the relationship between the hedging instrument and the hedged item, the risk management objectives and the methods used for assessing and testing hedge effectiveness. We also assess, both at the inception of the hedge and on an on-going basis, whether the derivatives that are used in our hedging transactions are highly effective in offsetting changes in cash flows or fair value of the hedged item. If we determine that a derivative originally designated as a cash flow or fair value hedge is no longer highly effective, we discontinue hedge accounting prospectively and record the change in the fair value of the derivative in current earnings. The changes in fair value of derivative financial instruments that are not designated as hedges for accounting purposes, which we refer to as economic hedges, are included in current earnings.

As part of our risk management process, we assess the creditworthiness of the financial and other institutions with which we execute financial derivatives. Such financial instruments involve the risk of non-performance by the counterparty, which could result in material losses to us.

Contingencies And Environmental

Certain conditions may exist as of the date our consolidated financial statements are issued that could result in a loss to us, but which will only be resolved when one or more future events occur or fail to occur. Our management assesses such contingent liabilities, which inherently involves significant judgment. In assessing loss contingencies related to legal proceedings that are pending against us or for unasserted claims that may result in proceedings, our management, with input from legal counsel, evaluates the perceived merits of any legal proceedings or unasserted claims as well as the perceived merits of the amount of relief sought or expected to be sought therein.

Environmental expenditures are charged to operating expense or capitalized based on the nature of the expenditures. Environmental expenditures that meet the capitalization criteria for property, plant and equipment, as well as costs that mitigate or prevent environmental contamination that has yet to occur, are capitalized. We expense expenditures that relate to an existing condition caused by past operations. We initially record environmental liabilities assumed in a business combination at fair value; otherwise, we record environmental liabilities on an undiscounted basis. We recognize liabilities for other commitments and contingencies when, after analyzing the available information, we determine it is probable that an asset has been impaired, or that a liability has been incurred and the amount of impairment or loss can be reasonably estimated. When we can estimate a range of probable loss, we accrue the most likely amount within that range, or if no amount is more likely than another, we accrue the minimum of the range of probable loss. We expense legal costs associated with loss contingencies as incurred.

We record environmental liabilities independently of any potential claim for recovery. Accruals related to environmental matters are generally determined based on site-specific plans for remediation, taking into account currently available facts, existing technologies and presently enacted laws and regulations. Accruals for environmental matters reflect our prior remediation experience and include an estimate for costs such as fees paid to contractors, outside engineering and consulting firms. Accruals for estimated losses from environmental remediation obligations generally are recognized no later than completion of the remediation feasibility study. Such accruals are adjusted as further information develops or circumstances change.

We maintain specific insurance coverage, which may cover all or portions of certain environmental expenditures less a deductible. We recognize receivables in cases where we consider the realization of reimbursements of remediation costs as probable. We would sustain losses to the extent of amounts we have recognized as environmental receivables if the counterparties to those transactions were unable to perform their obligations to us.

The determination of the accrual amounts recorded for environmental liabilities includes significant judgments and assumptions made by management. The use of alternate judgments and assumptions could result in the recognition of different levels of environmental remediation costs.

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Segment Disclosures (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Segment Reporting Information By Segment

	Year Ended December 31, 2018
	(in thousands)
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation and terminals revenue	$	1,316,616	$	566,063	$	(3,691)	$	1,878,988
Product sales revenue	880,453		46,767		—		927,220
Affiliate management fee revenue	5,533		14,832		—		20,365
Total revenue	2,202,602		627,662		(3,691)		2,826,573
Operating expenses	486,596		172,478		(9,638)		649,436
Cost of product sales	660,185		44,128		—		704,313
Earnings of non-controlled entities	(18,884)		(162,233)		—		(181,117)
Operating margin	1,074,705		573,289		5,947		1,653,941
Depreciation, amortization and impairment expense	202,047		57,083		5,947		265,077
G&A expenses	140,333		53,950		—		194,283
Operating profit	$	732,325	$	462,256	$	—	$	1,194,581
Additions to long-lived assets	$	357,359	$	148,995			$	506,354
	As of December 31, 2018
Segment assets	$	4,687,351	$	2,803,895			$	7,491,246
Corporate assets							256,291
Total assets							$	7,747,537
Goodwill	$	41,178	$	12,082			$	53,260
Investments in non-controlled entities	$	292,820	$	783,486			$	1,076,306

	Year Ended December 31, 2019
	(in thousands)
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation and terminals revenue	$	1,355,682	$	620,365	$	(5,417)	$	1,970,630
Product sales revenue	707,812		28,280		—		736,092
Affiliate management fee revenue	6,719		14,471		—		21,190
Total revenue	2,070,213		663,116		(5,417)		2,727,912
Operating expenses	471,743		173,261		(10,923)		634,081
Cost of product sales	591,228		28,051		—		619,279
Other operating (income) expense	(10,185)		7,210		—		(2,975)
Earnings of non-controlled entities	(8,070)		(160,891)		—		(168,961)
Operating margin	1,025,497		615,485		5,506		1,646,488
Depreciation, amortization and impairment expense	174,096		66,532		5,506		246,134
G&A expenses	140,735		55,915		—		196,650
Operating profit	$	710,666	$	493,038	$	—	$	1,203,704
Additions to long-lived assets	$	805,902	$	74,235			$	880,137
	As of December 31, 2019
Segment assets	$	5,411,920	$	2,894,733			$	8,306,653
Corporate assets							131,076
Total assets							$	8,437,729
Goodwill	$	41,178	$	12,082			$	53,260
Investments in non-controlled entities	$	422,384	$	818,167			$	1,240,551

	Year Ended December 31, 2020
	(in thousands)
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation and terminals revenue	$	1,241,846	$	559,570	$	(6,562)	$	1,794,854
Product sales revenue	578,630		33,089		—		611,719
Affiliate management fee revenue	6,270		14,959		—		21,229
Total revenue	1,826,746		607,618		(6,562)		2,427,802
Operating expenses	425,443		189,087		(13,171)		601,359
Cost of product sales	471,292		42,423		—		513,715
Other operating (income) expense	(3,247)		3,146		—		(101)
Earnings of non-controlled entities	(32,555)		(120,772)		—		(153,327)
Operating margin	965,813		493,734		6,609		1,466,156
Depreciation, amortization and impairment expense	175,510		76,557		6,609		258,676
G&A expenses	125,742		47,736		—		173,478
Operating profit	$	664,561	$	369,441	$	—	$	1,034,002
Additions to long-lived assets	$	291,863	$	56,401			$	348,264
	As of December 31, 2020
Segment assets	$	5,269,691	$	2,836,888			$	8,106,579
Corporate assets							90,403
Total assets							$	8,196,982
Goodwill	$	40,748	$	12,082			$	52,830
Investments in non-controlled entities	$	429,193	$	784,663			$	1,213,856

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Revenue from Contract with Customers (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables provide details of our revenues disaggregated by key activities that comprise our performance obligations by operating segment (in thousands):

	Year Ended December 31, 2018
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation	$	758,028	$	374,352	$	—	$	1,132,380
Terminalling	182,648		6,365		—		189,013
Storage	212,112		98,597		(3,691)		307,018
Ancillary services	136,122		26,151		—		162,273
Lease revenue	27,706		60,598		—		88,304
Transportation and terminals revenue	1,316,616		566,063		(3,691)		1,878,988
Product sales revenue	880,453		46,767		—		927,220
Affiliate management fee revenue	5,533		14,832		—		20,365
Total revenue	2,202,602		627,662		(3,691)		2,826,573
Revenue not under the guidance of ASC 606:
Lease revenue(1)	(27,706)		(60,598)		—		(88,304)
(Gains) losses from futures contracts included in product sales revenue(2)	(85,643)		632		—		(85,011)
Affiliate management fee revenue	(5,533)		(14,832)		—		(20,365)
Total revenue from contracts with customers under ASC 606	$	2,083,720	$	552,864	$	(3,691)	$	2,632,893

(1) Lease revenue is accounted for under ASC 840, Leases.

(2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging.

	Year Ended December 31, 2019
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation	$	787,688	$	381,654	$	—	$	1,169,342
Terminalling	185,008		17,822		—		202,830
Storage	215,042		119,330		(5,417)		328,955
Ancillary services	140,055		28,376		—		168,431
Lease revenue	27,889		73,183		—		101,072
Transportation and terminals revenue	1,355,682		620,365		(5,417)		1,970,630
Product sales revenue	707,812		28,280		—		736,092
Affiliate management fee revenue	6,719		14,471		—		21,190
Total revenue	2,070,213		663,116		(5,417)		2,727,912
Revenue not under the guidance of ASC 606:
Lease revenue(1)	(27,889)		(73,183)		—		(101,072)
(Gains) losses from futures contracts included in product sales revenue(2)	69,538		3,024		—		72,562
Affiliate management fee revenue	(6,719)		(14,471)		—		(21,190)
Total revenue from contracts with customers under ASC 606	$	2,105,143	$	578,486	$	(5,417)	$	2,678,212

(1) Lease revenue is accounted for under ASC 842, Leases.

(2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging.

	Year Ended December 31, 2020
	Refined Products		Crude Oil		Intersegment Eliminations		Total
Transportation	$	742,951	$	305,397	$	—	$	1,048,348
Terminalling	149,859		21,463		—		171,322
Storage	200,091		129,048		(6,562)		322,577
Ancillary services	125,268		26,936		—		152,204
Lease revenue	23,677		76,726		—		100,403
Transportation and terminals revenue	1,241,846		559,570		(6,562)		1,794,854
Product sales revenue	578,630		33,089		—		611,719
Affiliate management fee revenue	6,270		14,959		—		21,229
Total revenue	1,826,746		607,618		(6,562)		2,427,802
Revenue not under the guidance of ASC 606:
Lease revenue(1)	(23,677)		(76,726)		—		(100,403)
(Gains) losses from futures contracts included in product sales revenue(2)	(62,317)		3,624		—		(58,693)
Affiliate management fee revenue	(6,270)		(14,959)		—		(21,229)
Total revenue from contracts with customers under ASC 606	$	1,734,482	$	519,557	$	(6,562)	$	2,247,477

(1) Lease revenue is accounted for under ASC 842, Leases.

(2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging.

Contract with Customer, Asset and Liability

The following table summarizes our accounts receivable, contract assets and contract liabilities resulting from contracts with customers (in thousands):

	December 31, 2019		December 31, 2020
Accounts receivable from contracts with customers	$	124,701	$	108,843
Contract assets	$	8,071	$	12,220
Contract liabilities	$	111,670	$	102,964

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

The following table provides the aggregate amount of the transaction price allocated to our UPOs as of December 31, 2020 by operating segment, including the range of years remaining on our contracts with customers and an estimate of revenues expected to be recognized over the next 12 months (dollars in thousands):

	Refined Products		Crude Oil		Total
Balances at December 31, 2020	$	2,015,459	$	1,262,305	$	3,277,764
Remaining terms	1 - 18 years		1 - 11 years
Estimated revenues from UPOs to be recognized in the next 12 months	$	383,897	$	273,782	$	657,679

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Property, Plant and Equipment and Other Intangibles (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment consisted of the following (in thousands):

					Estimated  Depreciable Lives
	December 31,
	2019		2020
Construction work-in-progress	$	515,312	$	125,173
Land and rights-of-way	336,982		385,190
Buildings	125,772		126,619		10 to 53 years
Storage tanks	2,206,839		2,085,601		10 to 49 years
Pipeline and station equipment	2,917,059		3,327,078		10 to 59 years
Processing equipment	2,044,589		2,006,835		3 to 56 years
Other	284,674		296,329		3 to 53 years
Property, Plant and Equipment, Gross	$	8,431,227	$	8,352,825

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Investments in Non-Controlled Entities (Tables)

12 Months Ended

Dec. 31, 2020

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments

Our equity investments in non-controlled entities at December 31, 2020 were comprised of:

Entity	Ownership Interest
BridgeTex Pipeline Company, LLC (“BridgeTex”)	30%
Double Eagle Pipeline LLC (“Double Eagle”)	50%
HoustonLink Pipeline Company, LLC (“HoustonLink”)	50%
MVP Terminalling, LLC (“MVP”)	50%
Powder Springs Logistics, LLC (“Powder Springs”)	50%
Saddlehorn Pipeline Company, LLC (“Saddlehorn”)	30%
Seabrook Logistics, LLC (“Seabrook”)	50%
Texas Frontera, LLC (“Texas Frontera”)	50%

In the first quarter of 2020, we sold a 10% interest in Saddlehorn to an affiliate of Black Diamond Gathering LLC, which is majority-owned by Noble Midstream Partners LP, reducing our ongoing investment in Saddlehorn to a 30% interest. We received $79.9 million in cash from the sale, and we recorded a gain of $12.9 million on our consolidated statements of income for the year ended December 31, 2020.

We serve as operator of BridgeTex, HoustonLink, MVP, Powder Springs, Saddlehorn, Texas Frontera and the pipeline activities of Seabrook. We receive fees for management services as well as reimbursement or payment to us for certain direct operational payroll and other overhead costs. The management fees we receive are reported as affiliate management fee revenue on our consolidated statements of income. Cost reimbursements we receive from these entities in connection with our operating services are included as reductions to costs and expenses on our consolidated statements of income and totaled $3.9 million, $5.3 million and $3.6 million, respectively, for the years ended December 31, 2018, 2019 and 2020.

We recorded the following revenue and expense transactions from certain of these non-controlled entities in our consolidated statements of income (in thousands):

	Year Ended December 31,
	2018		2019		2020
Transportation and terminals revenue:
BridgeTex, capacity lease	$	39,596	$	41,806	$	42,286
Double Eagle, throughput revenue	$	5,250	$	6,213	$	4,917
Saddlehorn, storage revenue	$	2,180	$	2,234	$	2,483
Operating costs:
Seabrook, storage lease and ancillary services	$	10,572	$	25,851	$	29,116
MVP, sale of air emission reduction credits (reduction of operating costs)	$	(2,161)	$	—	$	—
Product sales revenue:
Powder Springs, butane sales	$	4,899	$	—	$	—
Seabrook, product sales	$	—	$	328	$	—
Cost of product sales:
Powder Springs, butane purchases	$	410	$	—	$	—
Other operating income:
MVP, easement sale	$	—	$	289	$	—
Seabrook, gain on sale of air emission credits	$	—	$	—	$	1,410

Our consolidated balance sheets reflected the following balances related to our investments in non-controlled entities (in thousands):

	December 31, 2019
	Trade Accounts Receivable		Other Accounts Receivable		Other Accounts Payable		Long-Term Receivables
BridgeTex	$	392	$	26	$	—	$	—
Double Eagle	$	445	$	—	$	—	$	—
HoustonLink	$	60	$	—	$	—	$	—
MVP	$	—	$	418	$	—	$	—
Powder Springs	$	161	$	—	$	—	$	6,006
Saddlehorn	$	—	$	126	$	—	$	—
Seabrook	$	941	$	—	$	1,349	$	—

	December 31, 2020
	Trade Accounts Receivable		Other Accounts Receivable		Other Accounts Payable		Long-Term Receivables
BridgeTex	$	355	$	27	$	970	$	—
Double Eagle	$	277	$	—	$	—	$	—
HoustonLink	$	—	$	—	$	144	$	—
MVP	$	—	$	467	$	2,297	$	—
Powder Springs	$	—	$	—	$	—	$	10,223
Saddlehorn	$	—	$	121	$	—	$	—
Seabrook	$	—	$	—	$	7,274	$	—

We entered into a long-term terminalling and storage contract with Seabrook for exclusive use of dedicated tankage that provides our customers with crude oil storage capacity and dock access for crude oil imports and exports on the Texas Gulf Coast (see Note 10 – Leases for more details regarding this lease).

The financial results from Powder Springs, MVP and Texas Frontera are included in our refined products segment and the financial results from BridgeTex, Double Eagle, HoustonLink, Saddlehorn and Seabrook are included in our crude oil segment, each as earnings of non-controlled entities.

A summary of our investments in non-controlled entities (representing only our proportionate interests) follows (in thousands):

Investments at December 31, 2019	$	1,240,551
Additional investment	95,068
Sale of ownership interest in Saddlehorn	(66,989)
Earnings of non-controlled entities:
Proportionate share of earnings	155,140
Amortization of excess investment and capitalized interest	(1,813)
Earnings of non-controlled entities	153,327
Less:
Distributions from operations of non-controlled entities	207,600
Distributions from returns of investments in non-controlled entities	501
Investments at December 31, 2020	$	1,213,856

Summarized financial information of our non-controlled entities (representing 100% of the interests in these entities) follows (in thousands):

	December 31,
	2019		2020
Current assets	$	260,033	$	243,828
Noncurrent assets	2,768,696		2,846,747
Total assets	$	3,028,729	$	3,090,575
Current liabilities	$	160,566	$	143,638
Noncurrent liabilities	60,886		57,515
Total liabilities	$	221,452	$	201,153
Equity	$	2,807,277	$	2,889,422

	Year Ended December 31,
	2018		2019		2020
Revenue	$	631,420	$	782,013	$	752,685
Net income	$	416,128	$	507,464	$	471,438

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Inventory (Tables)

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Inventory

Inventory at December 31, 2019 and 2020 was as follows (in thousands):

	December 31,
	2019		2020
Refined products	$	96,128	$	79,473
Liquefied petroleum gases	29,982		26,734
Transmix	39,546		23,397
Crude oil	12,714		32,431
Additives	6,029		5,354
Total inventory	$	184,399	$	167,389

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Supplemental Cash Flows Information (Tables)

12 Months Ended

Dec. 31, 2020

Supplemental Cash Flow Information [Abstract]

Consolidated Statement Of Cash Flows

Changes in the components of operating assets and liabilities are as follows (in thousands):

	Year Ended December 31,
	2018		2019		2020
Trade accounts receivable and other accounts receivable	$	24,169	$	(20,156)	$	(1,172)
Inventory	(3,390)		1,336		15,771
Accounts payable	21,146		(1,237)		4,225
Accrued payroll and benefits	14,015		4,931		(23,269)
Accrued interest payable	(7,399)		1,018		(5,278)
Accrued taxes other than income	1,750		12,914		4,131
Deferred revenue	5,191		(11,431)		(10,757)
Accrued product liabilities	(20,677)		15,306		(11,622)
Other current and noncurrent assets and liabilities	(12,559)		5,313		(13,278)
Total	$	22,246	$	7,994	$	(41,249)

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Debt (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Consolidated Debt

Debt

Long-term debt at December 31, 2019 and 2020 was as follows (in thousands): 

	December 31,
	2019		2020
4.25% Notes due 2021	$	550,000	$	—
3.20% Notes due 2025	250,000		250,000
5.00% Notes due 2026	650,000		650,000
3.25% Notes due 2030	—		500,000
6.40% Notes due 2037	250,000		250,000
4.20% Notes due 2042	250,000		250,000
5.15% Notes due 2043	550,000		550,000
4.20% Notes due 2045	250,000		250,000
4.25% Notes due 2046	500,000		500,000
4.20% Notes due 2047	500,000		500,000
4.85%Notes due 2049	500,000		500,000
3.95% Notes due 2050	500,000		800,000
Face value of long-term debt	4,750,000		5,000,000
Unamortized debt issuance costs(1)	(35,263)		(40,143)
Net unamortized debt premium (discount)(1)	(8,662)		18,834
Long-term debt, net	$	4,706,075	$	4,978,691

(1)    Debt issuance costs, note discounts and premiums and realized gains and losses of historical fair value hedges are being amortized or accreted to the applicable notes over the respective lives of those notes.

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Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Lessee, Operating Lease, Liability, Maturity

Future minimum rental payments under operating leases with initial terms greater than one year as of December 31, 2020 are as follows (in thousands):

	Third Party Leases		Seabrook Lease		All Leases
2021	$	20,463	$	12,701	$	33,164
2022	20,609		9,919		30,528
2023	20,854		9,919		30,773
2024	16,956		9,643		26,599
2025	16,250		6,612		22,862
Thereafter	18,541		24,246		42,787
Total future minimum rental payments	113,673		73,040		186,713
Present value discount	11,593		$	10,104	$	21,697
Total operating lease liability	$	102,080	$	62,936	$	165,016

Lessee, Operating Lease, Disclosure

The following tables provide further information about our operating leases (dollars in thousands):

	Year Ended 12/31/2019						Year Ended 12/31/2020
	Third Party Leases		Seabrook Lease		All Leases		Third Party Leases		Seabrook Lease		All Leases
Fixed lease expense	$	19,171	$	10,834	$	30,005	$	19,224	$	14,262	$	33,486
Short-term lease expense	1,603		—		1,603		1,334		—		1,334
Variable lease expense	3,058		15,017		18,075		4,105		14,854		18,959
Total lease expense	$	23,832	$	25,851	$	49,683	$	24,663	$	29,116	$	53,779

	As of and for the Year Ended
	December 31, 2019						December 31, 2020
	Third Party Leases		Seabrook Lease		All Leases		Third Party Leases		Seabrook Lease		All Leases
Current lease liability	$	15,136	$	11,085	$	26,221	$	17,099	$	10,434	$	27,533
Long-term lease liability	$	81,508	$	62,515	$	144,023	$	84,982	$	52,501	$	137,483
Right-of-use asset	$	98,268	$	73,600	$	171,868	$	103,142	$	62,936	$	166,078
Operating cash flows for operating leases	$	23,253	25,870		$	49,123	$	24,098	29,116		$	53,214
Weighted average remaining lease term (years)	6		8		7		6		7		7
Weighted-average discount rate	3.9%		4.0%		4.0%		3.7%		4.0%		3.8%

Lessor, Future Minimum Payments Receivable

Future minimum payments receivable under operating leases with initial terms greater than one year as of December 31, 2020 are estimated as follows (in thousands):

2021	$	30,235
2022	21,322
2023	18,820
2024	18,562
2025	13,911
Thereafter	40,645
Total	$	143,495

Leases, Investment in Direct Financing Lease

The net investment under this arrangement as of December 31, 2019 and 2020 was as follows (in thousands):

	December 31, 2019		December 31, 2020
Total minimum lease payments receivable	$	15,721	$	13,974
Less: Unearned income	2,814		2,257
Recorded net investment in sales-type lease	$	12,907	$	11,717

The net investment in this sales-type lease was classified in the consolidated balance sheets as follows (in millions):

	December 31, 2019		December 31, 2020
Other accounts receivable	$	1,190	$	1,245
Long-term receivables	11,717		10,472
Total	$	12,907	$	11,717

Future minimum payments receivable under this sales-type lease for the next five years are $1.7 million each year with $5.3 million due thereafter.

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Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2020

Retirement Benefits [Abstract]

Changes In Benefit Obligations And Plan Assets

The following table presents the changes in benefit obligations and plan assets for pension benefits and other postretirement benefits, as well as the end-of-period accumulated benefit obligation for the years ended December 31, 2019 and 2020 (in thousands):

	Pension Benefits				Other Postretirement Benefits
	2019		2020		2019		2020
Change in benefit obligations:
Benefit obligations at beginning of year	$	308,949	$	381,240	$	12,080	$	15,207
Service cost	25,406		27,736		193		258
Interest cost	12,163		10,989		507		479
Plan participants’ contributions	—		—		564		567
Actuarial loss	54,171		53,165		3,300		2,540
Benefits paid	(11,409)		(23,097)		(1,437)		(1,758)
Curtailment gain	—		(1,703)		—		—
Settlement payments	(8,040)		(4,685)		—		—
Benefit obligations at end of year	381,240		443,645		15,207		17,293
Change in plan assets:
Fair value of plan assets at beginning of year	197,590		249,293		—		—
Employer contributions	31,630		29,338		873		1,191
Plan participants’ contributions	—		—		564		567
Actual return on plan assets	39,522		43,560		—		—
Benefits paid	(11,409)		(23,097)		(1,437)		(1,758)
Settlement payments	(8,040)		(3,343)		—		—
Fair value of plan assets at end of year	249,293		295,751		—		—
Funded status at end of year	$	(131,947)	$	(147,894)	$	(15,207)	$	(17,293)
Accumulated benefit obligations	$	274,353	$	324,770

Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets

The following table summarizes information for pension plans with obligations in excess of plan assets (in thousands):

	December 31,
	2019		2020
Plans with a projected benefit obligation in excess of plan assets:
Projected benefit obligation	$	381,240	$	443,645
Fair value of plan assets	$	249,293	$	295,751
Plans with an accumulated benefit obligation in excess of plan assets:
Accumulated benefit obligation	$	274,353	$	324,770
Fair value of plan assets	$	249,293	$	295,751

Amounts Recognized In Consolidated Balance Sheets

Amounts recognized in the consolidated balance sheets included in these financial statements were as follows (in thousands):

	Pension Benefits				Other Postretirement Benefits
	2019		2020		2019		2020
Amounts recognized in consolidated balance sheets:
Current accrued benefit cost	$	—	$	—	$	1,162	$	1,411
Long-term pension and benefits	131,947		147,894		14,045		15,882
	131,947		147,894		15,207		17,293
Accumulated other comprehensive loss:
Net actuarial loss	(107,625)		(120,487)		(8,378)		(10,409)
Prior service credit	2,886		2,705		—		—
	(104,739)		(117,782)		(8,378)		(10,409)
Net amount of liabilities and accumulated other comprehensive loss recognized in consolidated balance sheets	$	27,208	$	30,112	$	6,829	$	6,884

Consolidated Net Periodic Benefit Costs

Net periodic benefit expense for the years ended December 31, 2018, 2019 and 2020 was as follows (in thousands): 

	Pension Benefits						Other Postretirement Benefits
	2018		2019		2020		2018		2019		2020
Components of net periodic pension and postretirement benefit expense:
Service cost	$	38,167	$	25,406	$	27,736	$	243	$	193	$	258
Interest cost	14,907		12,163		10,989		416		507		479
Expected return on plan assets	(12,090)		(9,401)		(11,354)		—		—		—
Amortization of prior service credit	(181)		(181)		(181)		—		—		—
Amortization of actuarial loss	9,763		5,489		5,425		589		331		509
Settlement cost	1,964		2,606		969		—		—		—
Settlement gain on disposition of assets	—		—		(1,342)		—		—		—
Net periodic expense	$	52,530	$	36,082	$	32,242	$	1,248	$	1,031	$	1,246

Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Loss

Changes in plan assets and benefit obligations recognized in other comprehensive income (loss) during 2018, 2019 and 2020 were as follows (in thousands):

	Pension Benefits						Other Postretirement Benefits
	2018		2019		2020		2018		2019		2020
Beginning balance	$	(97,226)	$	(88,602)	$	(104,739)	$	(6,597)	$	(5,409)	$	(8,378)
Net actuarial gain (loss)	(2,922)		(24,051)		(20,959)		599		(3,300)		(2,540)
Amortization of prior service credit	(181)		(181)		(181)		—		—		—
Amortization of actuarial loss	9,763		5,489		5,425		589		331		509
Curtailment gain	—		—		1,703		—		—		—
Settlement cost	1,964		2,606		969		—		—		—
Amount recognized in other comprehensive loss	8,624		(16,137)		(13,043)		1,188		(2,969)		(2,031)
Ending balance	$	(88,602)	$	(104,739)	$	(117,782)	$	(5,409)	$	(8,378)	$	(10,409)

Weighted-Average Rate Assumptions Used

The weighted-average rate assumptions used to determine projected benefit obligations were as follows:

	Pension Benefits		Other Postretirement Benefits
	2019	2020	2019	2020
Discount rate	3.01%	2.23%	3.06%	2.30%
Rate of compensation increase	4.58%	4.53%	n/a	n/a
Cash balance interest crediting rate	2.16%	1.70%	n/a	n/a

The weighted-average rate assumptions used to determine net pension and other postretirement benefit plans expense were as follows:

	Pension Benefits			Other Postretirement Benefits
	For the Year Ended December 31,			For the Year Ended December 31,
	2018	2019	2020	2018	2019	2020
Discount rate	3.63%	3.98%	3.01%	3.43%	4.08%	3.06%
Rate of compensation increase	6.38%	6.48%	4.58%	n/a	n/a	n/a
Expected rate of return on plan assets	6.00%	6.00%	4.50%	n/a	n/a	n/a
Cash balance interest crediting rate	3.15%	2.78%	2.16%	n/a	n/a	n/a

Schedule of Allocation of Plan Assets

The fair values of the pension plan assets at December 31, 2019 were as follows (in thousands):

Asset Category	Total		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Domestic Equity Securities:(1)
Small-cap fund	$	5,087	$	5,087	$	—	$	—
Mid-cap fund	5,095		5,095		—		—
Large-cap fund	40,884		40,884		—		—
International equity fund	25,580		25,580		—		—
Fixed Income Securities:(1)
Short-term bond fund	3,590		3,590		—		—
Intermediate-term bond fund	29,485		29,485		—		—
Long-term investment grade bond funds	132,096		132,096		—		—
Other:
Short-term investment fund	7,300		7,300		—		—
Group annuity contract	176		—		—		176
Fair value of plan assets	$	249,293	$	249,117	$	—	$	176

(1) We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated.

The fair values of the pension plan assets at December 31, 2020 were as follows (in thousands):

Asset Category	Total		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Domestic Equity Securities(1):
Small-cap fund	$	5,798	$	5,798	$	—	$	—
Mid-cap fund	5,853		5,853		—		—
Large-cap fund	47,598		47,598		—		—
International equity fund	29,876		29,876		—		—
Fixed Income Securities(1):
Short-term bond fund	4,209		4,209		—		—
Intermediate-term bond fund	34,894		34,894		—		—
Long-term investment grade bond funds	161,007		161,007		—		—
Other:
Short-term investment fund	6,354		6,354		—		—
Group annuity contract	162		—		—		162
Fair value of plan assets	$	295,751	$	295,589	$	—	$	162

(1) We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated.

The target allocation and actual weighted-average asset allocation percentages at December 31, 2019 and 2020 were as follows:

	2019		2020
	Actual	Target	Actual	Target
Equity securities	30%	30%	30%	30%
Fixed income securities	67%	67%	68%	67%
Other	3%	3%	2%	3%

Expected Benefit Payments

As of December 31, 2020, the benefit amounts expected to be paid from plan assets through December 31, 2030 were as follows (in thousands): 

	Pension Benefits		Other Postretirement Benefits
2021	$	21,404	$	1,410
2022	$	17,855	$	1,275
2023	$	21,413	$	1,168
2024	$	22,878	$	1,016
2025	$	23,629	$	975
2026 through 2030	$	145,885	$	3,929

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Long-Term Incentive Plan (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Changes In Non-Vested Unit Awards

The amounts below do not include adjustments for above-target or below-target performance.

	Performance-Based Awards			Time-Based Awards			Total Awards
	Number of Unit Awards	Weighted-Average Fair Value		Number of Unit Awards	Weighted-Average Fair Value		Number of Unit Awards	Weighted-Average Fair Value
Non-vested units - 1/1/2020	379,904	$	69.14	260,316	$	63.92	640,220	$	67.02
Units granted during 2020	189,632	$	61.16	198,450	$	61.18	388,082	$	61.17
Units vested during 2020	(196,142)	$	73.79	(75,089)	$	70.50	(271,231)	$	72.88
Units forfeited during 2020	(33,230)	$	65.70	(30,133)	$	62.90	(63,363)	$	64.37
Non-vested units - 12/31/20	340,164	$	62.35	353,544	$	61.07	693,708	$	61.70

Total Non-Vested Unit Awards

The table below summarizes the total non-vested unit awards outstanding, including estimated targeted financial performance adjustments, to determine our total equity-based liability accrual.

Grant Date	Non-Vested Unit Awards	Performance Adjustment to Unit Awards	Total Unit Award Accrual	Vesting Date	Unrecognized Compensation Expense (in millions)(a)
Performance-Based Awards:
2019 Awards	164,706	(82,353)	82,353	12/31/2021	$	1.7
2020 Awards	175,458	—	175,458	12/31/2022	7.0
Time-Based Awards:
2021 Vesting Date	170,837	—	170,837	12/31/2021	3.4
2022 Vesting Date	182,707	—	182,707	12/31/2022	7.6
Total	693,708	(82,353)	611,355		$	19.7

(a) Unrecognized compensation expense will be recognized over the remaining vesting period of the awards.

Weighted-Average Grant Date Fair Values

The weighted-average fair value of awards granted during 2018, 2019 and 2020 was as follows:

	Performance-Based Awards			Time-Based Awards
	Number of Unit Awards	Weighted-Average Fair Value		Number of Unit Awards	Weighted-Average Fair Value
Units granted during 2018	218,923	$	73.80	83,564	$	71.03
Units granted during 2019	182,834	$	63.65	195,031	$	62.91
Units granted during 2020	189,632	$	61.16	198,450	$	61.18

Vested Unit Awards

The table below sets forth the numbers and values of units that vested in each of the three years ended December 31, 2020. The vested common units include adjustments for above-target financial and market performance.

Vesting Date	Vested Common Units	Fair Value of Unit Awards on Vesting Date (in millions)	Intrinsic Value of Unit Awards on Vesting Date (in millions)
12/31/2018	317,037	$22.1	$18.1
12/31/2019	436,629	$31.0	$27.5
12/31/2020	235,127	$15.2	$10.0

Cash Flow Effects Of Long Term Incentive Plan Settlements [Table Text Block]

The difference between the common units issued to the participants and the total number of unit awards vested primarily represents the tax withholdings associated with the award settlement, which we pay in cash.

Settlement Date	Number of Common Units Issued, Net of Tax Withholdings	Tax Withholdings and Other Cash Payments (in millions)	Employer Taxes (in millions)	Total Cash Payments (in millions)
January 2018	168,913	$9.3	$1.1	$10.4
January 2019	199,792	$9.8	$0.9	$10.7
January 2020	275,093	$14.7	$1.3	$16.0

Equity-Based Incentive Compensation Expense

Equity-based incentive compensation expense for 2018, 2019 and 2020, primarily recorded as G&A expense on our consolidated statements of income, was as follows (in thousands):

	Year Ended December 31,
	2018		2019		2020
Performance awards	$	28,728	$	17,920	$	3,087
Time-based awards	3,325		6,092		8,898
Total	$	32,053	$	24,012	$	11,985

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Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule Of NYMEX Contracts And Butane Price Swap Purchase Agreements

Our open futures contracts at December 31, 2020 were as follows:

Type of Contract/Accounting Methodology	Product Represented by the Contract and Associated Barrels	Maturity Dates
Futures - Economic Hedges	3.4 million barrels of refined products and crude oil	Between January 2021 and November 2022
Futures - Economic Hedges	0.1 million barrels of gas liquids	Between January and April 2021

Derivatives and Offset Amounts

December 31, 2019 and 2020 (in thousands):

	Gross Amounts of Recognized Liabilities		Gross Amounts of Assets Offset in the Consolidated Balance Sheets		Net Amounts of Liabilities Presented in the Consolidated Balance Sheets		Margin Deposit Amounts Not Offset in the Consolidated Balance Sheets		Net Asset Amount(1)
As of December 31, 2019	$	(11,033)	$	811	$	(10,222)	$	27,415	$	17,193
As of December 31, 2020	$	(22,988)	$	1,690	$	(21,298)	$	34,165	$	12,867

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss)

The changes in derivative activity included in AOCL for the years ended December 31, 2018, 2019 and 2020 were as follows (in thousands):

	Year Ended December 31,
Derivative Gains (Losses) Included in AOCL	2018		2019		2020
Beginning balance	$	(33,755)	$	(26,480)	$	(48,960)
Net gain (loss) on interest rate contract cash flow hedges	4,317		(25,216)		(9,484)
Reclassification of net loss on cash flow hedges to income	2,958		2,736		3,445
Ending balance	$	(26,480)	$	(48,960)	$	(54,999)

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)

The following is a summary of the effect on our consolidated statements of income for the years ended December 31, 2018, 2019 and 2020 of derivatives that were designated as cash flow hedges (in thousands):

	Interest Rate Contracts
	Amount of Gain (Loss) Recognized in AOCL on  Derivatives			Location of Loss Reclassified from AOCL into Income	Amount of Loss Reclassified from AOCL into Income
Year Ended December 31, 2018		$	4,317	Interest expense		$	(2,958)
Year Ended December 31, 2019		$	(25,216)	Interest expense		$	(2,736)
Year Ended December 31, 2020		$	(9,484)	Interest expense		$	(3,445)

Schedule of Derivatives and Hedging-Overall-Subsequent Measurement

The following table provides a summary of the effect on our consolidated statements of income for the years ended December 31, 2018, 2019 and 2020 of derivatives that were not designated as hedging instruments (in thousands):

		Amount of Gain (Loss) Recognized on Derivative
		Year Ended December 31,
Derivative Instrument	Location of Gain (Loss) Recognized on Derivatives	2018		2019		2020
Futures contracts	Product sales revenue	$	85,012	$	(72,562)	$	58,693
Futures contracts	Cost of product sales	(15,947)		(1,931)		2,183
Basis derivative agreement	Other operating income (expense)	—		(10,252)		(4,253)
	Total	$	69,065	$	(84,745)	$	56,623

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The following tables provide a summary of the fair value of derivatives, which are presented on a net basis in our consolidated balance sheets, that were not designated as hedging instruments as of December 31, 2019 and 2020 (in thousands):

	December 31, 2019
	Asset Derivatives			Liability Derivatives
Derivative Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Futures contracts	Commodity derivatives contracts, net	$	811	Commodity derivatives contracts, net	$	11,033
Basis derivative agreement	Other current assets	—		Other current liabilities	8,457
Basis derivative agreement	Other noncurrent assets	—		Other noncurrent liabilities	8,847
	Total	$	811	Total	$	28,337
	December 31, 2020
	Asset Derivatives			Liability Derivatives
Derivative Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Futures contracts	Commodity derivatives contracts, net	$	616	Commodity derivatives contracts, net	$	22,988
Futures contracts	Other noncurrent assets	1,074		Other noncurrent liabilities	—
Basis derivative agreement	Other current assets	—		Other current liabilities	8,774
Basis derivative agreement	Other noncurrent assets	—		Other noncurrent liabilities	1,468
	Total	$	1,690	Total	$	33,230

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Fair Value Disclosures (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

The following tables summarize the carrying amounts, fair values and fair value measurements recorded or disclosed as of December 31, 2019 and 2020, based on the three levels established by ASC 820; Fair Value Measurements and Disclosures (in thousands):

					Fair Value Measurements as of December 31, 2019 using:
Assets (Liabilities)	Carrying Amount		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Commodity derivatives contracts	$	(10,222)	$	(10,222)	$	(10,222)	$	—	$	—
Basis derivative agreement	$	(17,304)	$	(17,304)	$	—	$	(17,304)	$	—
Long-term receivables	$	20,782	$	20,782	$	—	$	—	$	20,782
Guarantees and contractual obligations	$	(408)	$	(408)	$	—	$	—	$	(408)
Debt	$	(4,706,075)	$	(5,192,685)	$	—	$	(5,192,685)	$	—

					Fair Value Measurements as of December 31, 2020 using:
Assets (Liabilities)	Carrying Amount		Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Commodity derivatives contracts	$	(21,298)	$	(21,298)	$	(21,298)	$	—	$	—
Basis derivative agreement	$	(10,242)	$	(10,242)	$	—	$	(10,242)	$	—
Long-term receivables	$	22,755	$	22,755	$	—	$	—	$	22,755
Guarantees and contractual obligations	$	(11,207)	$	(11,207)	$	—	$	—	$	(11,207)
Debt	$	(4,978,691)	$	(5,880,850)	$	—	$	(5,880,850)	$	—

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Partners' Capital and Distributions (Tables)

12 Months Ended

Dec. 31, 2020

Partners' Capital Notes [Abstract]

Changes In Outstanding Limited Partner Units

The following table details the changes in the number of our common units outstanding from January 1, 2018 through December 31, 2020:

Common units outstanding on January 1, 2018	228,024,556
January 2018—Settlement of employee LTIP awards	168,913
During 2018—Other(a)	1,691
Common units outstanding on December 31, 2018	228,195,160
February 2019—Settlement of employee LTIP awards	199,792
During 2019—Other(a)	8,476
Common units outstanding on December 31, 2019	228,403,428
Units repurchased during 2020	(5,568,260)
February 2020—Settlement of employee LTIP awards	275,093
During 2020—Other(a)	9,550
Common units outstanding on December 31, 2020	223,119,811

(a)Common units issued to settle the equity-based retainer paid to independent directors of our general partner.

Distributions Made to Limited Partner, by Distribution

Distributions we paid during 2018, 2019 and 2020 were as follows (in thousands, except per unit amount):

Payment Date	Per Unit Distribution Amount		Total Distribution
2/14/2018	$	0.9200	$	209,940
5/15/2018	0.9375		213,933
8/14/2018	0.9575		218,497
11/14/2018	0.9775		223,061
Total	$	3.7925	$	865,431
2/14/2019	$	0.9975	$	227,832
5/15/2019	1.0050		229,545
8/14/2019	1.0125		231,258
11/14/2019	1.0200		232,971
Total	$	4.0350	$	921,606
2/14/2020	$	1.0275	$	234,774
5/15/2020	1.0275		231,245
8/14/2020	1.0275		231,245
11/13/2020	1.0275		229,853
Total	$	4.1100	$	927,117

XML

Organization and Description of Business (Narrative) (Details) bbl in Millions	12 Months Ended
	Dec. 31, 2020 bbl Terminal mi
Refined Products Segment [Member]
Organization and Description of Business [Line Items]
Pipeline, Length | mi	9,800
Number of Pipeline Terminals | Terminal	54
Number of Inland Terminals | Terminal	25
number of marine terminals | Terminal	2
Number of Marine Terminals Owned Through Joint Venture | Terminal	1
Crude Oil Pipeline and Terminals Segment [Member]
Organization and Description of Business [Line Items]
Pipeline, Length | mi	2,200
Storage Capacity | bbl	37
Contracted Storage | bbl	27
Pipeline, Length - Wholly Owned | mi	1,000
Storage Capacity - Wholly Owned | bbl	30
Contracted Storage - Wholly Owned | bbl	24

XML

Segment Disclosures (Segment Reporting Information By Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 2,427,802	$ 2,727,912	$ 2,826,573
Operating expenses	601,359	634,081	649,436
Cost of product sales	513,715	619,279	704,313
Other operating (income) expense	(101)	(2,975)	0
(Earnings) losses of non-controlled entities	(153,327)	(168,961)	(181,117)
Operating margin	1,466,156	1,646,488	1,653,941
Depreciation and amortization expense	258,676	246,134	265,077
G&A expenses	173,478	196,650	194,283
Operating profit	1,034,002	1,203,704	1,194,581
Additions to long-lived assets	358,765	980,575	562,296
Total assets	8,196,982	8,437,729	7,747,537
Goodwill	52,830	53,260	53,260
Investments in non-controlled entities	1,213,856	1,240,551	1,076,306
Operating Segments [Member]
Segment Reporting Information [Line Items]
Additions to long-lived assets	348,264	880,137	506,354
Total assets	8,106,579	8,306,653	7,491,246
Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,826,746	2,070,213	2,202,602
Operating expenses	425,443	471,743	486,596
Cost of product sales	471,292	591,228	660,185
Other operating (income) expense	(3,247)	(10,185)
(Earnings) losses of non-controlled entities	(32,555)	(8,070)	(18,884)
Operating margin	965,813	1,025,497	1,074,705
Depreciation and amortization expense	175,510	174,096	202,047
G&A expenses	125,742	140,735	140,333
Operating profit	664,561	710,666	732,325
Additions to long-lived assets	291,863	805,902	357,359
Total assets	5,269,691	5,411,920	4,687,351
Goodwill	40,748	41,178	41,178
Investments in non-controlled entities	429,193	422,384	292,820
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	607,618	663,116	627,662
Operating expenses	189,087	173,261	172,478
Cost of product sales	42,423	28,051	44,128
Other operating (income) expense	3,146	7,210
(Earnings) losses of non-controlled entities	(120,772)	(160,891)	(162,233)
Operating margin	493,734	615,485	573,289
Depreciation and amortization expense	76,557	66,532	57,083
G&A expenses	47,736	55,915	53,950
Operating profit	369,441	493,038	462,256
Additions to long-lived assets	56,401	74,235	148,995
Total assets	2,836,888	2,894,733	2,803,895
Goodwill	12,082	12,082	12,082
Investments in non-controlled entities	784,663	818,167	783,486
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total assets	90,403	131,076	256,291
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(6,562)	(5,417)	(3,691)
Operating expenses	(13,171)	(10,923)	(9,638)
Cost of product sales	0	0	0
Other operating (income) expense	0	0
(Earnings) losses of non-controlled entities	0	0	0
Operating margin	6,609	5,506	5,947
Depreciation and amortization expense	6,609	5,506	5,947
G&A expenses	0	0	0
Operating profit	0	0	0
Service [Member]
Segment Reporting Information [Line Items]
Revenues	1,794,854	1,970,630	1,878,988
Service [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,241,846	1,355,682	1,316,616
Service [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	559,570	620,365	566,063
Service [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(6,562)	(5,417)	(3,691)
Product [Member]
Segment Reporting Information [Line Items]
Revenues	611,719	736,092	927,220
Product [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	578,630	707,812	880,453
Product [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	33,089	28,280	46,767
Product [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0
Product and Service, Other [Member]
Segment Reporting Information [Line Items]
Revenues	21,229	21,190	20,365
Product and Service, Other [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	6,270	6,719	5,533
Product and Service, Other [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	14,959	14,471	14,832
Product and Service, Other [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	$ 0	$ 0	$ 0

XML

Revenue from Contract with Customers (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)
Disaggregation of Revenue [Line Items]
Average Delivery Point of Barrels in Pipeline System	50.00%
Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized	$ 93.4
Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue, Shipments Regulated By FERC, Percentage	40.00%
Revenue, Markets Regulated By State Or FERC, Percentage	60.00%

XML

Revenue from Contract with Customers (Disaggregated Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 2,427,802	$ 2,727,912	$ 2,826,573
Operating Leases, Income Statement, Lease Revenue			88,304
Operating Leases, Income Statement, Lease Revenue	100,403	101,072
Unrealized Gain (Loss) on Derivatives	58,693	(72,562)	85,011
Revenue from Related Parties	21,229	21,190	20,365
Revenue from Contract with Customer, Excluding Assessed Tax	2,247,477	2,678,212	2,632,893
Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,794,854	1,970,630	1,878,988
Product [Member]
Disaggregation of Revenue [Line Items]
Revenues	611,719	736,092	927,220
Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	21,229	21,190	20,365
Transferred over Time [Member] | Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,048,348	1,169,342	1,132,380
Transferred over Time [Member] | Terminalling [Member]
Disaggregation of Revenue [Line Items]
Revenues	171,322	202,830	189,013
Transferred over Time [Member] | Storage [Member]
Disaggregation of Revenue [Line Items]
Revenues	322,577	328,955	307,018
Transferred over Time [Member] | Ancillary Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	152,204	168,431	162,273
Transferred over Time [Member] | Lease Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	100,403	101,072	88,304
Transferred over Time [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,794,854	1,970,630	1,878,988
Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenues	611,719	736,092	927,220
Operating Segments [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,826,746	2,070,213	2,202,602
Operating Leases, Income Statement, Lease Revenue			27,706
Operating Leases, Income Statement, Lease Revenue	23,677	27,889
Unrealized Gain (Loss) on Derivatives	62,317	(69,538)	85,643
Revenue from Related Parties	6,270	6,719	5,533
Revenue from Contract with Customer, Excluding Assessed Tax	1,734,482	2,105,143	2,083,720
Operating Segments [Member] | Refined Products Segment [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,241,846	1,355,682	1,316,616
Operating Segments [Member] | Refined Products Segment [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenues	578,630	707,812	880,453
Operating Segments [Member] | Refined Products Segment [Member] | Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	6,270	6,719	5,533
Operating Segments [Member] | Refined Products Segment [Member] | Transferred over Time [Member] | Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenues	742,951	787,688	758,028
Operating Segments [Member] | Refined Products Segment [Member] | Transferred over Time [Member] | Terminalling [Member]
Disaggregation of Revenue [Line Items]
Revenues	149,859	185,008	182,648
Operating Segments [Member] | Refined Products Segment [Member] | Transferred over Time [Member] | Storage [Member]
Disaggregation of Revenue [Line Items]
Revenues	200,091	215,042	212,112
Operating Segments [Member] | Refined Products Segment [Member] | Transferred over Time [Member] | Ancillary Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	125,268	140,055	136,122
Operating Segments [Member] | Refined Products Segment [Member] | Transferred over Time [Member] | Lease Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	23,677	27,889	27,706
Operating Segments [Member] | Refined Products Segment [Member] | Transferred over Time [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,241,846	1,355,682	1,316,616
Operating Segments [Member] | Refined Products Segment [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenues	578,630	707,812	880,453
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenues	607,618	663,116	627,662
Operating Leases, Income Statement, Lease Revenue			60,598
Operating Leases, Income Statement, Lease Revenue	76,726	73,183
Unrealized Gain (Loss) on Derivatives	(3,624)	(3,024)	(632)
Revenue from Related Parties	14,959	14,471	14,832
Revenue from Contract with Customer, Excluding Assessed Tax	519,557	578,486	552,864
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	559,570	620,365	566,063
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenues	33,089	28,280	46,767
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	14,959	14,471	14,832
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Transferred over Time [Member] | Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenues	305,397	381,654	374,352
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Transferred over Time [Member] | Terminalling [Member]
Disaggregation of Revenue [Line Items]
Revenues	21,463	17,822	6,365
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Transferred over Time [Member] | Storage [Member]
Disaggregation of Revenue [Line Items]
Revenues	129,048	119,330	98,597
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Transferred over Time [Member] | Ancillary Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	26,936	28,376	26,151
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Transferred over Time [Member] | Lease Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	76,726	73,183	60,598
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Transferred over Time [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	559,570	620,365	566,063
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenues	33,089	28,280	46,767
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenues	(6,562)	(5,417)	(3,691)
Operating Leases, Income Statement, Lease Revenue			0
Operating Leases, Income Statement, Lease Revenue	0	0
Unrealized Gain (Loss) on Derivatives	0	0	0
Revenue from Related Parties	0	0	0
Revenue from Contract with Customer, Excluding Assessed Tax	(6,562)	(5,417)	(3,691)
Intersegment Eliminations [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	(6,562)	(5,417)	(3,691)
Intersegment Eliminations [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Intersegment Eliminations [Member] | Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Intersegment Eliminations [Member] | Transferred over Time [Member] | Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Intersegment Eliminations [Member] | Transferred over Time [Member] | Terminalling [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Intersegment Eliminations [Member] | Transferred over Time [Member] | Storage [Member]
Disaggregation of Revenue [Line Items]
Revenues	(6,562)	(5,417)	(3,691)
Intersegment Eliminations [Member] | Transferred over Time [Member] | Ancillary Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Intersegment Eliminations [Member] | Transferred over Time [Member] | Lease Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Intersegment Eliminations [Member] | Transferred over Time [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	(6,562)	(5,417)	(3,691)
Intersegment Eliminations [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0	$ 0

XML

Revenue from Contracts with Customers (Contract Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Billed Contracts Receivable	$ 108,843	$ 124,701
Contract with Customer, Asset, after Allowance for Credit Loss	12,220	8,071
Contract with Customer, Liability	$ 102,964	$ 111,670

XML

Revenue from Contract with Customer (Remaining Performance Obligation) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 3,277,764
Refined Products Segment [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	2,015,459
Crude Oil Pipeline and Terminals Segment [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 1,262,305

XML

Revenue from Contract with Customer (Performance Obligations in Next 12 Months) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 3,277,764
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Amount	$ 657,679
Refined Products Segment [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	2,015,459
Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	383,897
Crude Oil Pipeline and Terminals Segment [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	1,262,305
Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 273,782
Minimum [Member] | Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Minimum [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Maximum [Member] | Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	18 years
Maximum [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	11 years

XML

Property, Plant and Equipment and Other Intangibles (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Interest Costs Threshold For Capitalization Construction In Process	$ 500
Long-term Debt, Weighted Average Interest Rate, over Time	4.40%	4.60%	4.80%
Property, Plant and Equipment, Gross	$ 8,352,825	$ 8,431,227
Depreciation expense	$ 256,000	242,900	$ 214,400
Impairments			49,100
Finite-Lived Intangible Asset, Useful Life	18 years
Amortization of Intangible Assets	$ 2,700	3,300	$ 1,600
Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	296,329	284,674
Capitalized Interest [Member] | Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 98,400	$ 86,400
Minimum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life	30 years

XML

Property, Plant and Equipment and Other Intangibles (Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Long-term Debt, Weighted Average Interest Rate, over Time	4.40%	4.60%	4.80%
Property, Plant and Equipment, Gross	$ 8,352,825	$ 8,431,227
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	125,173	515,312
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	385,190	336,982
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	126,619	125,772
Storage Tanks [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,085,601	2,206,839
Pipelines [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,327,078	2,917,059
Processing Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,006,835	2,044,589
Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 296,329	$ 284,674
Minimum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	10 years
Minimum [Member] | Storage Tanks [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	10 years
Minimum [Member] | Pipelines [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	10 years
Minimum [Member] | Processing Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	3 years
Minimum [Member] | Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	3 years
Maximum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	53 years
Maximum [Member] | Storage Tanks [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	49 years
Maximum [Member] | Pipelines [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	59 years
Maximum [Member] | Processing Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	56 years
Maximum [Member] | Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	53 years

XML

Investments in Non-Controlled Entities (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments Unamortized Excess Investment Net	$ 33.0	$ 33.9

XML

Investments in Non-Controlled Entities (Equity Method Investments) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Proceeds from Sale of Productive Assets	$ 334,894,000	$ 65,366,000	$ 576,568,000
Gain (Loss) on Disposition of Other Assets	12,887,000	28,966,000	353,797,000
Revenues	2,427,802,000	2,727,912,000	2,826,573,000
Operating expenses	601,359,000	634,081,000	649,436,000
Cost of product sales	513,715,000	619,279,000	704,313,000
Other operating income (expense)	101,000	2,975,000	0
Accounts Receivable, after Allowance for Credit Loss, Current	109,136,000	125,440,000
Other accounts receivable	37,075,000	23,887,000
Change in Equity Method Investments [Roll Forward]
Investments at December 31, 2019	1,240,551,000	1,076,306,000
Additional Investments	95,068,000
Equity Method Investment, Amount Sold	(66,989,000)
Proportionate Share of Equity Earnings	155,140,000
Amortization of Excess Investment and Capitalized Interest	(1,813,000)
Income (Loss) from Equity Method Investments	153,327,000	168,961,000	181,117,000
Distributions from operations of non-controlled entities	207,600,000	203,602,000	196,686,000
Distributions from returns of investments in non-controlled entities	501,000	8,494,000	1,786,000
Investments at December 31, 2020	1,213,856,000	1,240,551,000	1,076,306,000
Equity Method Investment, Summarized Financial Information, Current Assets	405,193,000	459,408,000
Total assets	8,196,982,000	8,437,729,000	7,747,537,000
Equity Method Investment, Summarized Financial Information, Current Liabilities	558,574,000	666,876,000
Equity Method Investment, Summarized Financial Information, Partners' Capital	2,303,806,000	2,715,028,000	2,643,434,000	$ 2,129,653,000
Equity Method Investment, Summarized Financial Information, Revenues	2,427,802,000	2,727,912,000	2,826,573,000
Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Revenues	752,685,000	782,013,000	631,420,000
Change in Equity Method Investments [Roll Forward]
Equity Method Investment, Summarized Financial Information, Current Assets	243,828,000	260,033,000
Equity Method Investment, Summarized Financial Information, Noncurrent Assets	2,846,747,000	2,768,696,000
Total assets	3,090,575,000	3,028,729,000
Equity Method Investment, Summarized Financial Information, Current Liabilities	143,638,000	160,566,000
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities	57,515,000	60,886,000
Equity Method Investment, Summarized Financial Information, Liabilities	201,153,000	221,452,000
Equity Method Investment, Summarized Financial Information, Partners' Capital	2,889,422,000	2,807,277,000
Equity Method Investment, Summarized Financial Information, Revenues	752,685,000	782,013,000	631,420,000
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	471,438,000	507,464,000	416,128,000
Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party	$ 3,600,000	5,300,000	3,900,000
BridgeTex [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	30.00%
BridgeTex [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	$ 355,000	392,000
Other accounts receivable	27,000	26,000
Accounts Payable, Other	$ 970,000
Double Eagle Pipeline Llc [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	$ 277,000	445,000
HoustonLink Pipeline Company LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
HoustonLink Pipeline Company LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current		60,000
Accounts Payable, Other	$ 144,000
MVP Terminalling, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
MVP Terminalling, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Operating expenses			(2,161,000)
Other operating income (expense)		289,000
Other accounts receivable	$ 467,000	418,000
Accounts Payable, Other	$ 2,297,000	0
Powder Springs Logistics, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Powder Springs Logistics, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Cost of product sales			410,000
Accounts Receivable, after Allowance for Credit Loss, Current		161,000
Long-term receivables	$ 10,223,000	6,006,000
Saddlehorn Pipeline Company [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	30.00%
equity method investment sold percent	10.00%
Proceeds from Sale of Productive Assets	$ 79,900,000
Gain (Loss) on Disposition of Other Assets	12,900,000
Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Other accounts receivable	$ 121,000	126,000
Seabrook Logistics, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Seabrook Logistics, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Operating expenses	$ 29,116,000	25,851,000	10,572,000
Other operating income (expense)	1,410,000
Accounts Receivable, after Allowance for Credit Loss, Current		941,000
Accounts Payable, Other	$ 7,274,000	1,349,000
Texas Frontera Llc [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 1,794,854,000	1,970,630,000	1,878,988,000
Change in Equity Method Investments [Roll Forward]
Equity Method Investment, Summarized Financial Information, Revenues	1,794,854,000	1,970,630,000	1,878,988,000
Service [Member] | BridgeTex [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	42,286,000	41,806,000	39,596,000
Change in Equity Method Investments [Roll Forward]
Equity Method Investment, Summarized Financial Information, Revenues	42,286,000	41,806,000	39,596,000
Service [Member] | Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	4,917,000	6,213,000	5,250,000
Change in Equity Method Investments [Roll Forward]
Equity Method Investment, Summarized Financial Information, Revenues	4,917,000	6,213,000	5,250,000
Service [Member] | Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	2,483,000	2,234,000	2,180,000
Change in Equity Method Investments [Roll Forward]
Equity Method Investment, Summarized Financial Information, Revenues	2,483,000	2,234,000	2,180,000
Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	611,719,000	736,092,000	927,220,000
Change in Equity Method Investments [Roll Forward]
Equity Method Investment, Summarized Financial Information, Revenues	$ 611,719,000	736,092,000	927,220,000
Product [Member] | Powder Springs Logistics, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Revenues			4,899,000
Change in Equity Method Investments [Roll Forward]
Equity Method Investment, Summarized Financial Information, Revenues			$ 4,899,000
Product [Member] | Seabrook Logistics, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Revenues		328,000
Change in Equity Method Investments [Roll Forward]
Equity Method Investment, Summarized Financial Information, Revenues		$ 328,000

XML

Inventory (Inventory) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Refined petroleum products	$ 79,473	$ 96,128
Liquefied petroleum gases	26,734	29,982
Transmix	23,397	39,546
Crude oil	32,431	12,714
Additives	5,354	6,029
Total inventory	$ 167,389	$ 184,399

XML

Supplemental Cash Flows Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]
Increase (decrease) in long-term pension and benefits liability	$ 21.5	$ 27.0	$ 2.3

XML

Supplemental Cash Flows Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]
Trade accounts receivable and other accounts receivable	$ (1,172)	$ (20,156)	$ 24,169
Inventory	15,771	1,336	(3,390)
Accounts payable	4,225	(1,237)	21,146
Accrued payroll and benefits	(23,269)	4,931	14,015
Accrued interest payable	(5,278)	1,018	(7,399)
Accrued taxes other than income	4,131	12,914	1,750
Deferred revenue	(10,757)	(11,431)	5,191
Accrued product purchases	(11,622)	15,306	(20,677)
Other current and noncurrent assets and liabilities	(13,278)	5,313	(12,559)
Changes in components of operating assets and liabilities	$ (41,249)	$ 7,994	$ 22,246

XML

Debt (Consolidated Debt) (Details) - USD ($)		Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 5,000,000,000	$ 4,750,000,000
Debt Issuance Costs, Net	[1]	(40,143,000)	(35,263,000)
Debt Instrument, Unamortized Discount (Premium), Net	[1]	18,834,000	(8,662,000)
Long-term Debt, Excluding Current Maturities, Total		4,978,691,000	4,706,075,000
4.25% Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 0	550,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.25%
3.20% Notes Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 250,000,000	250,000,000
Debt Instrument, Interest Rate, Stated Percentage		3.20%
5.0% Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 650,000,000	650,000,000
Debt Instrument, Interest Rate, Stated Percentage		5.00%
3.25% Notes Due 2030
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 500,000,000.0	0
Debt Instrument, Interest Rate, Stated Percentage		3.25%
6.40% Notes Due 2037 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 250,000,000	250,000,000
Debt Instrument, Interest Rate, Stated Percentage		6.40%
4.20% Notes Due 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 250,000,000	250,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.20%
5.15% Notes Due 2043 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 550,000,000	550,000,000
Debt Instrument, Interest Rate, Stated Percentage		5.15%
4.20% Notes Due 2045 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 250,000,000	250,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.20%
4.25% Notes Due 2046 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 500,000,000	500,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.25%
4.20% Notes Due 2047 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 500,000,000	500,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.20%
4.85% Notes Due 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 500,000,000	$ 500,000,000.0
Debt Instrument, Interest Rate, Stated Percentage		4.85%	4.85%
3.95% Notes due 2050 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 800,000,000	$ 500,000,000
Debt Instrument, Interest Rate, Stated Percentage		3.95%	3.95%

[1] Debt issuance costs, note discounts and premiums and realized gains and losses of historical fair value hedges are being amortized or accreted to the applicable notes over the respective lives of those notes.

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Debt (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 0
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	0
Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Long-term Debt, Maturities, Repayments of Principal in Year Five	250,000,000
Long-term Debt, Maturities, Repayments of Principal after Year Five	4,750,000,000
Debt Instrument, Face Amount	5,000,000,000	$ 4,750,000,000
Payment for Debt Extinguishment or Debt Prepayment Cost	12,893,000	8,270,000	$ 0
Proceeds from Issuance of Senior Long-term Debt	828,434,000	996,405,000	0
Gain (Loss) on Extinguishment of Debt	$ (12,893,000)	$ (8,270,000)	$ 0
Long-term Debt, Weighted Average Interest Rate, over Time	4.40%	4.60%	4.80%
Cash Payments for Interest	$ 234,500,000	$ 217,100,000	$ 227,800,000
4.25% Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 0	550,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.25%
Extinguishment of Debt, Amount	$ 550,000,000.0
Gain (Loss) on Extinguishment of Debt	12,900,000
Amortization of Debt Discount (Premium)	700,000
3.25% Notes Due 2030
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000.0	0
Debt Instrument, Interest Rate, Stated Percentage	3.25%
Debt Instrument, Notes At Price	99.88%
Proceeds from Issuance of Senior Long-term Debt	$ 495,200,000
Three Point Nine Five Percentage Notes Due Two Thousand Fifty Second Issue [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 300,000,000.0
Debt Instrument, Interest Rate, Stated Percentage	3.95%
Debt Instrument, Notes At Price	109.678%
Proceeds from Issuance of Senior Long-term Debt	$ 329,200,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000,000,000.0
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.125%
Letters of Credit Outstanding, Amount	$ 3,500,000	3,500,000
Debt Instrument, Consolidated Debt to EBITDA Ratio	5.0
Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.875%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.075%
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.20%
Commercial Paper [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000,000,000.0
Long-term Debt	$ 0	$ 0
Long-term Debt, Weighted Average Interest Rate, over Time	0.40%	2.60%
Commercial Paper [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Term	397 days
Line of Credit [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 0	$ 0

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Leases (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating Leases, Rent Expense, Net			$ 42.1
Operating Leases, Income Statement, Contingent Revenue			$ 51.8
Operating Lease, Variable Lease Income	$ 61.4	$ 58.4
Processing Equipment [Member]
Property, Plant and Equipment [Line Items]
Operating lease, right-of-use asset, gross	226.4
Storage Tanks [Member]
Property, Plant and Equipment [Line Items]
Operating lease, right-of-use asset, gross	58.3
Pipelines [Member]
Property, Plant and Equipment [Line Items]
Operating lease, right-of-use asset, gross	48.7
Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Operating lease, right-of-use asset, gross	$ 30.5

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Lessee, Operating Lease Liability, Maturity (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Related Party Transaction [Line Items]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 33,164
Lessee, Operating Lease, Liability, Payments, Due Year Two	30,528
Lessee, Operating Lease, Liability, Payments, Due Year Three	30,773
Lessee, Operating Lease, Liability, Payments, Due Year Four	26,599
Lessee, Operating Lease, Liability, Payments, Due Year Five	22,862
Lessee, Operating Lease, Liability, Payments, Due after Year Five	42,787
Lessee, Operating Lease, Liability, Payments, Due	186,713
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	21,697
Operating Lease, Liability	165,016
Related Party Leases | Equity Method Investee [Member] | Seabrook Logistics, LLC [Member]
Related Party Transaction [Line Items]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	12,701
Lessee, Operating Lease, Liability, Payments, Due Year Two	9,919
Lessee, Operating Lease, Liability, Payments, Due Year Three	9,919
Lessee, Operating Lease, Liability, Payments, Due Year Four	9,643
Lessee, Operating Lease, Liability, Payments, Due Year Five	6,612
Lessee, Operating Lease, Liability, Payments, Due after Year Five	24,246
Lessee, Operating Lease, Liability, Payments, Due	73,040
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	10,104
Operating Lease, Liability	62,936
Third Party Leases
Related Party Transaction [Line Items]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	20,463
Lessee, Operating Lease, Liability, Payments, Due Year Two	20,609
Lessee, Operating Lease, Liability, Payments, Due Year Three	20,854
Lessee, Operating Lease, Liability, Payments, Due Year Four	16,956
Lessee, Operating Lease, Liability, Payments, Due Year Five	16,250
Lessee, Operating Lease, Liability, Payments, Due after Year Five	18,541
Lessee, Operating Lease, Liability, Payments, Due	113,673
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	11,593
Operating Lease, Liability	$ 102,080

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Leases Lessee, Operating Lease, Disclosure (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Operating Lease, Cost	$ 33,486	$ 30,005
Short-term Lease, Cost	1,334	1,603
Variable Lease, Cost	18,959	18,075
Lease, Cost	53,779	49,683
Current portion of operating lease liability	27,533	26,221
Long-term operating lease liability	137,483	144,023
Right-of-use asset, operating leases	166,078	171,868
Operating Lease, Payments	$ 53,214	$ 49,123
Operating Lease, Weighted Average Remaining Lease Term	7 years	7 years
Operating Lease, Weighted Average Discount Rate, Percent	3.80%	4.00%
Third Party Leases
Related Party Transaction [Line Items]
Operating Lease, Cost	$ 19,224	$ 19,171
Short-term Lease, Cost	1,334	1,603
Variable Lease, Cost	4,105	3,058
Lease, Cost	24,663	23,832
Current portion of operating lease liability	17,099	15,136
Long-term operating lease liability	84,982	81,508
Right-of-use asset, operating leases	103,142	98,268
Operating Lease, Payments	$ 24,098	$ 23,253
Operating Lease, Weighted Average Remaining Lease Term	6 years	6 years
Operating Lease, Weighted Average Discount Rate, Percent	3.70%	3.90%
Seabrook Logistics, LLC [Member] | Equity Method Investee [Member] | Related Party Leases
Related Party Transaction [Line Items]
Operating Lease, Cost	$ 14,262	$ 10,834
Short-term Lease, Cost	0	0
Variable Lease, Cost	14,854	15,017
Lease, Cost	29,116	25,851
Current portion of operating lease liability	10,434	11,085
Long-term operating lease liability	52,501	62,515
Right-of-use asset, operating leases	62,936	73,600
Operating Lease, Payments	$ 29,116	$ 25,870
Operating Lease, Weighted Average Remaining Lease Term	7 years	8 years
Operating Lease, Weighted Average Discount Rate, Percent	4.00%	4.00%

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Lessor, Future Minimum Payments Receivable (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Leases [Abstract]
Lessor, Operating Lease, Payments to be Received, Next Twelve Months	$ 30,235
Lessor, Operating Lease, Payments to be Received, Two Years	21,322
Lessor, Operating Lease, Payments to be Received, Three Years	18,820
Lessor, Operating Lease, Payments to be Received, Four Years	18,562
Lessor, Operating Lease, Payments to be Received, Five Years	13,911
Lessor, Operating Lease, Payments to be Received, Thereafter	40,645
Lessor, Operating Lease, Payments to be Received	$ 143,495

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Leases (Investment in Direct Financing Lease) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Capital Leases, Net Investment in Direct Financing Leases [Abstract]
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received	$ 13,974	$ 15,721
Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount	2,257	2,814
Sales-type and Direct Financing Leases, Lease Receivable	11,717	12,907
Net Investment in Lease, Current	1,245	1,190
Net Investment in Lease, Noncurrent	10,472	11,717
Net Investment in Lease	11,717	$ 12,907
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Next Twelve Months	1,700
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Two Years	1,700
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Three Years	1,700
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years	1,700
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Five Years	1,700
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Thereafter	$ 5,300

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Employee Benefit Plans (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) pension_plan	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number Of Sponsored Pension Plans | pension_plan	2
Number Of Sponsored Pension Plans, Non-Union Employees | pension_plan	1
Number Of Sponsored Pension Plans, Union Employees | pension_plan	1
Defined contribution plan, expenses	$ 12,200	$ 11,400	$ 11,000
Long-term pension and benefits	163,776	145,992
Equity Method Investment, Summarized Financial Information, Partners' Capital	$ 2,303,806	$ 2,715,028	2,643,434	$ 2,129,653
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.08%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	67.00%	67.00%
Fixed Income Securities [Member] | Scenario, Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	70.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	30.00%	30.00%
Equity Securities [Member] | Scenario, Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	30.00%
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	$ (53,165)	$ (54,171)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	32,242	36,082	52,530
Long-term pension and benefits	147,894	131,947
Equity Method Investment, Summarized Financial Information, Partners' Capital	(117,782)	(104,739)	(88,602)	(97,226)
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	(6,200)
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	(200)
Contributions estimated to be paid	29,700
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(2,540)	(3,300)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	1,246	1,031	1,248
Long-term pension and benefits	15,882	14,045
Equity Method Investment, Summarized Financial Information, Partners' Capital	(10,409)	$ (8,378)	(5,409)	$ (6,597)
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	(600)
Contributions estimated to be paid	$ 1,400
Error in Actuarial Assumptions [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)			19,400
Long-term pension and benefits			22,200
Equity Method Investment, Summarized Financial Information, Partners' Capital			$ (2,800)

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Employee Benefit Plans (Changes In Benefit Obligations And Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	$ 381,240	$ 308,949
Service cost	27,736	25,406	$ 38,167
Interest cost	10,989	12,163	14,907
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	0	0
Actuarial loss	53,165	54,171
Benefits paid	(23,097)	(11,409)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	(1,703)	0
Settlements	(4,685)	(8,040)
Benefit obligation at end of year	443,645	381,240	308,949
Change in plan assets:
Beginning balance	249,293	197,590
Employer contributions	29,338	31,630
Plan participants’ contributions	0	0
Actual return on plan assets	43,560	39,522
Defined Benefit Plan, Plan Assets, Benefits Paid	23,097	11,409
Defined Benefit Plan, Plan Assets, Payment for Settlement	(3,343)	(8,040)
Fair value of plan assets at end of year	295,751	249,293	197,590
Funded status at end of year	(147,894)	(131,947)
Accumulated benefit obligation	324,770	274,353
Other Postretirement Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	15,207	12,080
Service cost	258	193	243
Interest cost	479	507	416
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	567	564
Actuarial loss	2,540	3,300
Benefits paid	(1,758)	(1,437)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0	0
Settlements	0	0
Benefit obligation at end of year	17,293	15,207	12,080
Change in plan assets:
Beginning balance	0	0
Employer contributions	1,191	873
Plan participants’ contributions	567	564
Actual return on plan assets	0	0
Defined Benefit Plan, Plan Assets, Benefits Paid	1,758	1,437
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Fair value of plan assets at end of year	0	0	$ 0
Funded status at end of year	$ (17,293)	$ (15,207)

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Employee Benefit Plans (Pension Plans With Obligations In Excess of Assets) (Details) - Pension Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	$ 443,645	$ 381,240	$ 308,949
Defined Benefit Plan, Plan Assets, Amount	295,751	249,293	$ 197,590
Defined Benefit Plan, Accumulated Benefit Obligation	$ 324,770	$ 274,353

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Employee Benefit Plans (Amounts Recognized In Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amounts recognized in consolidated balance sheet:
Long-term pension and benefit cost	$ 163,776	$ 145,992
Accumulated other comprehensive loss:
Accumulated Other Comprehensive Income (Loss), Net of Tax	(183,190)	(162,077)
Pension Plan [Member]
Amounts recognized in consolidated balance sheet:
Current accrued benefit cost	0	0
Long-term pension and benefit cost	147,894	131,947
Net amount recognized in consolidated balance sheet	147,894	131,947
Accumulated other comprehensive loss:
Net actuarial loss	(120,487)	(107,625)
Prior service credit	2,705	2,886
Accumulated Other Comprehensive Income (Loss), Net of Tax	(117,782)	(104,739)
Amount of Liabilities and Accumulated Other Comprehensive Loss Recognized in Consolidated Balance Sheet	30,112	27,208
Other Postretirement Benefits [Member]
Amounts recognized in consolidated balance sheet:
Current accrued benefit cost	1,411	1,162
Long-term pension and benefit cost	15,882	14,045
Net amount recognized in consolidated balance sheet	17,293	15,207
Accumulated other comprehensive loss:
Net actuarial loss	(10,409)	(8,378)
Prior service credit	0	0
Accumulated Other Comprehensive Income (Loss), Net of Tax	(10,409)	(8,378)
Amount of Liabilities and Accumulated Other Comprehensive Loss Recognized in Consolidated Balance Sheet	$ 6,884	$ 6,829

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Employee Benefit Plans (Consolidated Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan [Member]
Components of net periodic pension and postretirement benefit expense:
Service cost	$ 27,736	$ 25,406	$ 38,167
Interest cost	10,989	12,163	14,907
Expected return on plan assets	(11,354)	(9,401)	(12,090)
Amortization of prior service cost (credit)	(181)	(181)	(181)
Amortization of net actuarial loss	5,425	5,489	9,763
Settlement	969	2,606	1,964
Defined Benefit Plan, Other Cost (Credit)	(1,342)	0	0
Net periodic expense (credit)	32,242	36,082	52,530
Other Postretirement Benefits [Member]
Components of net periodic pension and postretirement benefit expense:
Service cost	258	193	243
Interest cost	479	507	416
Expected return on plan assets	0	0	0
Amortization of prior service cost (credit)	0	0	0
Amortization of net actuarial loss	509	331	589
Settlement	0	0	0
Defined Benefit Plan, Other Cost (Credit)	0	0	0
Net periodic expense (credit)	$ 1,246	$ 1,031	$ 1,248

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Employee Benefit Plans (Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in AOCL [Roll Forward]
Beginning Balance	$ 2,715,028	$ 2,643,434	$ 2,129,653
Net actuarial loss	(23,499)	(27,351)	(2,323)
Recognition of prior service credit amortization in income	(181)	(181)	(181)
Recognition of actuarial loss amortization in income	5,934	5,820	10,352
Curtailment gain	1,703	0	0
Settlement cost	969	2,606	1,964
Total other comprehensive income (loss)	(21,113)	(41,586)	17,087
Ending Balance	2,303,806	2,715,028	2,643,434
Pension Plan [Member]
Changes in AOCL [Roll Forward]
Beginning Balance	(104,739)	(88,602)	(97,226)
Net actuarial loss	(20,959)	(24,051)	(2,922)
Recognition of prior service credit amortization in income	(181)	(181)	(181)
Recognition of actuarial loss amortization in income	5,425	5,489	9,763
Curtailment gain	1,703	0	0
Settlement cost	969	2,606	1,964
Total other comprehensive income (loss)	(13,043)	(16,137)	8,624
Ending Balance	(117,782)	(104,739)	(88,602)
Other Postretirement Benefits [Member]
Changes in AOCL [Roll Forward]
Beginning Balance	(8,378)	(5,409)	(6,597)
Net actuarial loss	(2,540)	(3,300)	599
Recognition of prior service credit amortization in income	0	0	0
Recognition of actuarial loss amortization in income	509	331	589
Curtailment gain	0	0	0
Settlement cost	0	0	0
Total other comprehensive income (loss)	(2,031)	(2,969)	1,188
Ending Balance	$ (10,409)	$ (8,378)	$ (5,409)

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Employee Benefit Plans (Weighted-Average Rate Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.23%	3.01%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	4.53%	4.58%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate	1.70%	2.16%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.01%	3.98%	3.63%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.58%	6.48%	6.38%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.50%	6.00%	6.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate	2.16%	2.78%	3.15%
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.30%	3.06%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.06%	4.08%	3.43%

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Employee Benefit Plans (Fair Value Of Pension Plan Assets) (Details) - Pension Plan [Member] - USD ($) $ in Thousands		Dec. 31, 2020		Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 295,751		$ 249,293	$ 197,590
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		295,589		249,117
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		162		176
Small-Cap Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	5,798		5,087
Small-Cap Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	5,798		5,087
Mid-Cap Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	5,853		5,095
Mid-Cap Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	5,853		5,095
Large-Cap Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	47,598		40,884
Large-Cap Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	47,598		40,884
International Equity Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		29,876	[1]	25,580
International Equity Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		29,876	[1]	25,580
Short-Term Bond Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	4,209		3,590
Short-Term Bond Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	4,209		3,590
Intermediate-Term Bond Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	34,894		29,485
Intermediate-Term Bond Funds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	34,894		29,485
Long-Term Investment Grade Bond Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	161,007		132,096
Long-Term Investment Grade Bond Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	161,007		132,096
Short-Term Investment Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6,354		7,300
Short-Term Investment Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6,354		7,300
Group Annuity Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		162		176
Group Annuity Contract [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 162		$ 176

[1] We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated.

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Employee Benefit Plans (Target Allocation And Actual Weighted-Average Asset Allocation Of Plan Assets) (Details)	Dec. 31, 2020	Dec. 31, 2019
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocation	30.00%	30.00%
Target plan asset allocation	30.00%	30.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocation	68.00%	67.00%
Target plan asset allocation	67.00%	67.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocation	2.00%	3.00%
Target plan asset allocation	3.00%	3.00%

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Employee Benefit Plans (Expected Benefit Payments) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2021	$ 21,404
2022	17,855
2023	21,413
2024	22,878
2025	23,629
2026 through 2030	145,885
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2021	1,410
2022	1,275
2023	1,168
2024	1,016
2025	975
2026 through 2030	$ 3,929

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Long-Term Incentive Plan (Narrative) (Details) shares in Millions	12 Months Ended
	Dec. 31, 2020 shares
Long Term Incentive Plan [Line Items]
Limited partners' capital account, units issued (in units)	11.9
Limited partner unitholders, units remaining available (in shares)	1.1
Board of Director Deferred Award Days to Payment	60 days
Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Equity Based Compensation, Award Payout Percentage, Minimum	0.00%
Equity Based Compensation, Award Payout Percentage, Maximum	200.00%
Equity Based Compensation Award Payout Fluctuation Of Award Market	50.00%
Share-Based Compensation Arrangement By Share-Based Payment Award, Award Forfeiture Period	2 years
Minimum [Member]
Long Term Incentive Plan [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Maximum [Member]
Long Term Incentive Plan [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years

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Long-Term Incentive Plan (Changes In Non-Vested Unit Awards) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested units - 1/1/2020 (in shares)	640,220
Units granted (in shares)	388,082
Units vested during 2020 (in shares)	(271,231)
Units forfeited during 2019 (in shares)	(63,363)
Non-vested units - 12/31/20 (in shares)	693,708	640,220
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested units - 1/1/2020 (in dollars per share)	$ 67.02
Units granted during 2020 (in dollars per share)	61.17
Units vested during 2020 (in dollars per share)	72.88
Units forfeited during 2020 (in dollars per share)	64.37
Non-vested units - 12/31/20 (in dollars per share)	$ 61.70	$ 67.02
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested units - 1/1/2020 (in shares)	379,904
Units granted (in shares)	189,632	182,834	218,923
Units vested during 2020 (in shares)	(196,142)
Units forfeited during 2019 (in shares)	(33,230)
Non-vested units - 12/31/20 (in shares)	340,164	379,904
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested units - 1/1/2020 (in dollars per share)	$ 69.14
Units granted during 2020 (in dollars per share)	61.16	$ 63.65	$ 73.80
Units vested during 2020 (in dollars per share)	73.79
Units forfeited during 2020 (in dollars per share)	65.70
Non-vested units - 12/31/20 (in dollars per share)	$ 62.35	$ 69.14
Time-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested units - 1/1/2020 (in shares)	260,316
Units granted (in shares)	198,450	195,031	83,564
Units vested during 2020 (in shares)	(75,089)
Units forfeited during 2019 (in shares)	(30,133)
Non-vested units - 12/31/20 (in shares)	353,544	260,316
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested units - 1/1/2020 (in dollars per share)	$ 63.92
Units granted during 2020 (in dollars per share)	61.18	$ 62.91	$ 71.03
Units vested during 2020 (in dollars per share)	70.50
Units forfeited during 2020 (in dollars per share)	62.90
Non-vested units - 12/31/20 (in dollars per share)	$ 61.07	$ 63.92

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Long-Term Incentive Plan (Total Non-Vested Unit Awards) (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Long Term Incentive Plan [Line Items]
Non-vested units (in shares)		693,708	640,220
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results (in shares)		(82,353)
Total Unit Award Accrual (in shares)		611,355
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	[1]	$ 19.7
Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Non-vested units (in shares)		340,164	379,904
Time-Based Awards [Member]
Long Term Incentive Plan [Line Items]
Non-vested units (in shares)		353,544	260,316
Two Thousand Nineteen Awards [Member] | Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Non-vested units (in shares)		164,706
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results (in shares)		(82,353)
Total Unit Award Accrual (in shares)		82,353
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	[1]	$ 1.7
Two Thousand Twenty Awards | Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Non-vested units (in shares)		175,458
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results (in shares)		0
Total Unit Award Accrual (in shares)		175,458
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	[1]	$ 7.0
Retention Awards Vesting 2021 [Member] | Time-Based Awards [Member]
Long Term Incentive Plan [Line Items]
Non-vested units (in shares)		170,837
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results (in shares)		0
Total Unit Award Accrual (in shares)		170,837
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	[1]	$ 3.4
Retention Awards Vesting 2022 [Member] | Time-Based Awards [Member]
Long Term Incentive Plan [Line Items]
Non-vested units (in shares)		182,707
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results (in shares)		0
Total Unit Award Accrual (in shares)		182,707
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	[1]	$ 7.6

[1] Unrecognized compensation expense will be recognized over the remaining vesting period of the awards.

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Long-Term Incentive Plan (Weighted-Average Grant Date Fair Values) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Long Term Incentive Plan [Line Items]
Units granted (in shares)	388,082
Weighted-Average Grant Date Fair Value (in dollars per share)	$ 61.17
Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Units granted (in shares)	189,632	182,834	218,923
Weighted-Average Grant Date Fair Value (in dollars per share)	$ 61.16	$ 63.65	$ 73.80
Time-Based Awards [Member]
Long Term Incentive Plan [Line Items]
Units granted (in shares)	198,450	195,031	83,564
Weighted-Average Grant Date Fair Value (in dollars per share)	$ 61.18	$ 62.91	$ 71.03

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Long-Term Incentive Plan (Vested Unit Awards) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement [Abstract]
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Total Unit Award Accrual Number (in shares)	235,127	436,629	317,037
Fair Value of Unit Awards on Vesting Date (in millions)	$ 15.2	$ 31.0	$ 22.1
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested	$ 10.0	$ 27.5	$ 18.1

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Long-Term Incentive Plan (Cash Flow Effects Of LTIP Settlements) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement [Abstract]
Partners' Capital Account, Units, Unit-based Compensation (in shares)	275,093	199,792	168,913
Settlement of tax withholdings on long-term incentive compensation	$ 14,700	$ 9,764	$ 9,285
Payments for Other Taxes	1,300	900	1,100
Total Cash Taxes Paid (in millions)	$ 16,000	$ 10,700	$ 10,400

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Long-Term Incentive Plan (Equity-Based Incentive Compensation Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	$ 11,985	$ 24,012	$ 32,053
Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	3,087	17,920	28,728
Time-Based Awards [Member]
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	$ 8,898	$ 6,092	$ 3,325

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Derivative Financial Instruments (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) bbl	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Derivative [Line Items]
Debt Instrument, Face Amount	$ 5,000,000,000	$ 4,750,000,000
Net payment on financial derivatives	9,484,000	33,342,000	$ (24,619,000)
Commodity derivatives deposits	34,165,000	27,415,000
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	(3,300,000)
Three Point Nine Five Percentage Notes Due Two Thousand Fifty Second Issue [Member]
Derivative [Line Items]
Debt Instrument, Face Amount	$ 300,000,000.0
Debt Instrument, Interest Rate, Stated Percentage	3.95%
Net payment on financial derivatives	$ (1,000,000.0)
3.25% Notes Due 2030
Derivative [Line Items]
Debt Instrument, Face Amount	$ 500,000,000.0	0
Debt Instrument, Interest Rate, Stated Percentage	3.25%
Net payment on financial derivatives	$ 10,400,000
3.95% Notes due 2050 [Member]
Derivative [Line Items]
Debt Instrument, Face Amount	$ 800,000,000	$ 500,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.95%	3.95%
Net payment on financial derivatives		$ 25,300,000
4.85% Notes Due 2049 [Member]
Derivative [Line Items]
Debt Instrument, Face Amount	$ 500,000,000	$ 500,000,000.0
Debt Instrument, Interest Rate, Stated Percentage	4.85%	4.85%
Net payment on financial derivatives		$ 8,000,000.0
Interest Rate Contract [Member] | Future Debt Issuance 2018 [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Net payment on financial derivatives			(24,600,000)
Derivative, Notional Amount			$ 200,000,000.0
Energy Related Derivative [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl	30,000
Derivative Liability	$ 10,200,000	$ 17,300,000

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Derivative Financial Instruments (Schedule Of NYMEX Contracts And Butane Price Swap Purchase Agreements) (Details) bbl in Millions	Dec. 31, 2020 bbl
Economic Hedges [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	3.4
Economic Hedges Futures [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	0.1

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Derivative Financial Instruments (Schedule of Derivative Offset Amounts) (Details) - Exchange Traded [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ (22,988)	$ (11,033)
Derivative Asset, Fair Value, Gross Asset	1,690	811
Derivative Asset, Fair Value, Amount Offset Against Collateral	(21,298)	(10,222)
Derivative, Collateral, Right to Reclaim Cash	34,165	27,415
Amount After Offset	$ 12,867	$ 17,193

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Derivative Financial Instruments (Amounts Included in AOCL) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Gains Included in Accumulated Other Comprehensive Loss [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	$ (48,960)	$ (26,480)	$ (33,755)
Net gain (loss) on cash flow hedges	(9,484)	(25,216)	4,317
Reclassification of net loss on cash flow hedges to income	3,445	2,736	2,958
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	$ (54,999)	$ (48,960)	$ (26,480)

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Derivative Financial Instruments (Derivatives And Hedging-Cash Flow Hedges) (Details) - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - Interest Rate Contract [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	$ (9,484)	$ (25,216)	$ 4,317
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income	$ (3,445)	$ (2,736)	$ (2,958)

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Derivative Financial Instruments (Derivatives And Hedging-Overall-Subsequent Measurement) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 56,623	$ (84,745)	$ 69,065
Sales [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	58,693	(72,562)	85,012
Cost of Sales [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	2,183	(1,931)	(15,947)
Other Operating Income (Expense) [Member] | Energy Related Derivative [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (4,253)	$ (10,252)	$ 0

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Derivative Financial Instruments (Derivatives And Hedging-Designated) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 1,690	$ 811
Derivative Liability, Fair Value, Gross Liability	33,230	28,337
Commodity Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	616	811
Commodity Contract [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	22,988	11,033
Commodity Contract [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1,074
Commodity Contract [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	0
Energy Related Derivative [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Energy Related Derivative [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	8,774	8,457
Energy Related Derivative [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Energy Related Derivative [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 1,468	$ 8,847

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Fair Value Disclosures (Details) $ in Thousands	Dec. 31, 2020 USD ($) bbl	Dec. 31, 2019 USD ($)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivables, Fair Value Disclosure	$ 0	$ 0
Guarantees, Fair Value Disclosure	0	0
Long-term Debt, Fair Value	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivables, Fair Value Disclosure	0	0
Guarantees, Fair Value Disclosure	0	0
Long-term Debt, Fair Value	(5,880,850)	(5,192,685)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivables, Fair Value Disclosure	22,755	20,782
Guarantees, Fair Value Disclosure	(11,207)	(408)
Long-term Debt, Fair Value	0	0
Commodity Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	(21,298)	(10,222)
Commodity Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	0	0
Commodity Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	$ 0	0
Energy Related Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Nonmonetary Notional Amount | bbl	30,000
Derivative Liability	$ (10,200)	(17,300)
Energy Related Derivative [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	0	0
Energy Related Derivative [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	(10,242)	(17,304)
Energy Related Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	0	0
Reported Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivables, Fair Value Disclosure	22,755	20,782
Guarantees, Fair Value Disclosure	(11,207)	(408)
Long-term Debt, Fair Value	(4,978,691)	(4,706,075)
Reported Value Measurement [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	(21,298)	(10,222)
Reported Value Measurement [Member] | Energy Related Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	(10,242)	(17,304)
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivables, Fair Value Disclosure	22,755	20,782
Guarantees, Fair Value Disclosure	(11,207)	(408)
Long-term Debt, Fair Value	(5,880,850)	(5,192,685)
Estimate of Fair Value Measurement [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	(21,298)	(10,222)
Estimate of Fair Value Measurement [Member] | Energy Related Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	$ (10,242)	$ (17,304)

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Commitments and Contingencies (Details) (Narrative) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2020 Terminal	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Oct. 04, 2017 facility
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies		$ 14.3	$ 14.9
Environmental Remediation Expense		$ 3.8	$ 4.4	$ 15.0
Number Of Marine Terminals Sold | Terminal	3
Powder Springs Logistics, LLC [Member]
Loss Contingencies [Line Items]
Equity Method Investment, Ownership Percentage		50.00%
Guarantee of Indebtedness of Others [Member] | Equity Method Investee [Member] | Powder Springs Logistics, LLC [Member]
Loss Contingencies [Line Items]
Guarantees, Fair Value Disclosure		$ 0.4
Equity Method Investment, Ownership Percentage		50.00%
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 25.0
Other Current Liabilities [Member] | Performance Guarantee [Member]
Loss Contingencies [Line Items]
Guarantees, Fair Value Disclosure		0.6
Other Noncurrent Liabilities [Member] | Performance Guarantee [Member]
Loss Contingencies [Line Items]
Guarantees, Fair Value Disclosure		$ 10.2
Unfavorable Regulatory Action [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Alleged Patent Infringement, Number Of Facilities | facility					9

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Major Customers and Concentration Of Risks (Details)	12 Months Ended
	Dec. 31, 2020 Employee
Concentration Risk [Line Items]
Number of employees	1,720
Corporate, Non-Segment [Member]
Concentration Risk [Line Items]
Number of employees	533
Refined Products Segment [Member] | Operating Segments [Member]
Concentration Risk [Line Items]
Number of employees	934
Crude Oil Pipeline and Terminals Segment [Member] | Operating Segments [Member]
Concentration Risk [Line Items]
Number of employees	253
Unionized Employees Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	13.00%

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Related Party Transactions (Narrative) (Details) - Director [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Methvin Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party	$ 37.4	$ 29.6	$ 21.7
Accounts Receivable, Related Parties, Current	3.9	$ 3.8
Related Party Transaction, Amounts of Transaction	0.2
Methvin Company 2 [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party	$ 0.5

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Partners' Capital and Distributions (Changes In Limited Partner Units Outstanding) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Limited Partners' Capital Account [Roll Forward]
Limited partner unitholders, units outstanding (in shares)		228,403,428	228,195,160	228,024,556
Stock Repurchased During Period, Shares		(5,568,260)
Partners' Capital Account, Units, Unit-based Compensation (in shares)		275,093	199,792	168,913
Limited partner unitholders, units outstanding (in shares)		223,119,811	228,403,428	228,195,160
Stock Repurchase Program, Authorized Amount		$ 750,000,000
Limited Partners' Capital Account, Right to Receive Distribution in Cash, Period		45 days
Limited Partners' Capital Account, Removal of Magellan GP, LLC, Percentage Vote		100.00%
Limited Partners' Capital Account, Annual Report Available, Period		120 days
Limited Partners' Capital Account, Tax Reporting Information, Period		90 days
Management [Member]
Limited Partners' Capital Account [Roll Forward]
Partners' Capital Account, Units, Unit-based Compensation (in shares)		275,093	199,792	168,913
Director [Member]
Limited Partners' Capital Account [Roll Forward]
Partners' Capital Account, Units, Unit-based Compensation (in shares)	[1]	9,550	8,476	1,691

[1] issued to settle the equity-based retainer paid to independent directors of our general partner.

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Partners' Capital and Distributions (Distributions) (Details) - USD ($) $ / shares in Units, $ in Thousands													12 Months Ended
	Nov. 13, 2020	Aug. 14, 2020	May 15, 2020	Feb. 14, 2020	Nov. 14, 2019	Aug. 14, 2019	May 15, 2019	Feb. 14, 2019	Nov. 14, 2018	Aug. 14, 2018	May 15, 2018	Feb. 14, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Partners' Capital Notes [Abstract]
Partners' Capital Account, Distribution Per Unit of Limited Partner Interest (in dollars per share)	$ 1.0275	$ 1.0275	$ 1.0275	$ 1.0275	$ 1.0200	$ 1.0125	$ 1.0050	$ 0.9975	$ 0.9775	$ 0.9575	$ 0.9375	$ 0.9200	$ 4.1100	$ 4.0350	$ 3.7925
Limited Partners' Capital Account, Distribution Amount	$ 229,853	$ 231,245	$ 231,245	$ 234,774	$ 232,971	$ 231,258	$ 229,545	$ 227,832	$ 223,061	$ 218,497	$ 213,933	$ 209,940	$ 927,117	$ 921,606	$ 865,431

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Subsequent Events (Details) - $ / shares	Feb. 12, 2021	Dec. 31, 2020	Nov. 13, 2020	Aug. 14, 2020	May 15, 2020	Feb. 14, 2020	Dec. 31, 2019	Nov. 14, 2019	Aug. 14, 2019	May 15, 2019	Feb. 14, 2019	Dec. 31, 2018	Nov. 14, 2018	Aug. 14, 2018	May 15, 2018	Feb. 14, 2018
Subsequent Event [Line Items]
Partners' Capital Account, Distribution Per Unit of Limited Partner Interest (in dollars per share)		$ 4.1100	$ 1.0275	$ 1.0275	$ 1.0275	$ 1.0275	$ 4.0350	$ 1.0200	$ 1.0125	$ 1.0050	$ 0.9975	$ 3.7925	$ 0.9775	$ 0.9575	$ 0.9375	$ 0.9200
Subsequent Event [Member]
Subsequent Event [Line Items]
Partners' Capital Account, Distribution Per Unit of Limited Partner Interest (in dollars per share)	$ 1.0275

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Label	Element	Value
Accounting Standards Update [Extensible List]	us-gaap_AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201409Member