Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment and Accumulated Depreciation

The historical costs of our property, plant and equipment and related balances were as follows at the dates indicated:

	Estimated Useful Life			December 31,
	in Years			2021		2020
Plants, pipelines and facilities (1)		3-45	(5)	$	51,635.6	$	49,972.8
Underground and other storage facilities (2)		5-40	(6)		4,327.3		4,207.5
Transportation equipment (3)		3-10			208.9		204.9
Marine vessels (4)		15-30			918.1		932.7
Land					379.1		371.9
Construction in progress					1,616.4		1,807.7
Subtotal					59,085.4		57,497.5
Less accumulated depreciation					17,083.0		15,584.7
Subtotal property, plant and equipment, net					42,002.4		41,912.8
Capitalized major maintenance costs for reaction-based    plants, net of accumulated amortization (7)					85.3		–
Property, plant and equipment, net				$	42,087.7	$	41,912.8

(1)	Plants, pipelines and facilities include processing plants; NGL, natural gas, crude oil and petrochemical and refined products pipelines; terminal loading and unloading facilities; buildings; office furniture and equipment; laboratory and shop equipment and related assets.
(2)	Underground and other storage facilities include underground product storage caverns; above ground storage tanks; water wells and related assets.
(3)	Transportation equipment includes tractor-trailer tank trucks and other vehicles and similar assets used in our operations.
(4)	Marine vessels include tow boats, barges and related equipment used in our marine transportation business.
(5)	In general, the estimated useful lives of major assets within this category are: processing plants, 20-35 years; pipelines and related equipment, 5-45 years; terminal facilities, 10-35 years; buildings, 20-40 years; office furniture and equipment, 3-20 years; and laboratory and shop equipment, 5-35 years.
(6)	In general, the estimated useful lives of assets within this category are: underground storage facilities, 5-35 years; storage tanks, 10-40 years; and water wells, 5-35 years.
(7)	For reaction-based plants, we use the deferral method when accounting for major maintenance activities.  Under the deferral method, major maintenance costs are capitalized and amortized over the period until the next major overhaul project.  On a weighted-average basis, the expected remaining amortization period for these costs is 2.5 years.

Depreciation and Accretion Expense and Capitalized Interest

The following table summarizes our depreciation expense and capitalized interest amounts for the years indicated:

	For the Year Ended December 31,
	2021		2020		2019
Depreciation expense (1)	$	1,705.5	$	1,681.9	$	1,562.6
Capitalized interest (2)		79.6		115.0		143.8

(1)	Depreciation expense is a component of “Third party and other costs” within “Costs and expenses” as presented on our Statements of Consolidated Operations.
(2)	Capitalized interest is a component of “Interest expense” as presented on our Statements of Consolidated Operations.

AROs

The following table presents information regarding our AROs for the years indicated:

	For the Year Ended December 31,
	2021			2020			2019
ARO liability beginning balance	$	149.5		$	132.1		$	126.3
Liabilities incurred (1)		6.5			4.6			5.0
Revisions in estimated cash flows (2)		5.9			(0.4	)		(4.3	)
Liabilities settled (3)		(3.5	)		(1.5	)		(2.3	)
Accretion expense (4)		18.0			14.7			7.4
ARO liability ending balance	$	176.4		$	149.5		$	132.1

(1)	Represents the initial recognition of estimated ARO liabilities during period.
(2)	Represents subsequent adjustments to estimated ARO liabilities during period.
(3)	Represents cash payments to settle ARO liabilities during period.
(4)	Represents net change in ARO liability balance attributable to the passage of time and other adjustments, including true-up amounts associated with revised closure estimates.

The following table presents our forecast of ARO-related accretion expense for the years indicated:

2022		2023		2024		2025		2026
$	9.5	$	10.1	$	10.7	$	11.4	$	12.1

Impairments of Property, Plant and Equipment

The following table presents our non-cash asset impairment charges involving property, plant and equipment by business segment for the years indicated:

	For the Year Ended December 31,
	2021		2020		2019
NGL Pipelines & Services:
South Texas natural gas processing plants	$	–	$	86.9	$	15.6
Other		20.2		121.2		23.5
Crude Oil Pipelines & Services:
Cancellation of Midland-to-ECHO 4 project		–		42.2
Other		14.6		3.3		2.6
Natural Gas Pipelines & Services:
Val Verde gathering system and treating facility		37.5
South Texas natural gas gathering pipelines		–		37.8
Other		18.9		5.5		4.8
Petrochemical & Refined Products Services:
Marine transportation business		112.5		252.1
Other		14.0		40.8		4.6
Total impairment charges for property, plant and equipment	$	217.7	$	589.8	$	51.1