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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Future cash outflow to pay for construction in progress expenditures that have occurred.

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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- Definition

Amount of interest capitalized during the period.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Property and Equipment (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property and Equipment
Capitalized interest			$ 24	$ 34	$ 30
Property and equipment, gross	$ 18,585		18,585	18,948
Accumulated depreciation	(3,974)		(3,974)	(3,593)
Property and equipment, net	14,611		14,611	15,355
Depreciation expense			563	525	454
Construction in progress expenditures incurred but not yet paid			$ 51	120	206
Level 3 \| Measurement Input, Discount Rate \| Valuation Technique, Discounted Cash Flow
Property and Equipment
Discount rate, asset impairment analysis, cost of capital, theoretical market participant			14.00%
(Gains)/losses on asset sales and asset impairments, net
Property and Equipment
Non-cash impairment losses, long-lived assets	95	$ 446	$ 541
Transportation \| Pipelines and related facilities
Property and Equipment
Non-cash impairment losses, long-lived assets			415
Pipelines and related facilities
Property and Equipment
Property and equipment, gross	11,112		$ 11,112	11,114
Pipelines and related facilities \| Minimum
Property and Equipment
Estimated useful lives			10 years
Pipelines and related facilities \| Maximum
Property and Equipment
Estimated useful lives			70 years
Storage, terminal and rail facilities
Property and Equipment
Property and equipment, gross	6,042		$ 6,042	6,134
Storage, terminal and rail facilities \| Minimum
Property and Equipment
Estimated useful lives			10 years
Storage, terminal and rail facilities \| Maximum
Property and Equipment
Estimated useful lives			70 years
Trucking equipment and other
Property and Equipment
Property and equipment, gross	524		$ 524	486
Trucking equipment and other \| Minimum
Property and Equipment
Estimated useful lives			2 years
Trucking equipment and other \| Maximum
Property and Equipment
Estimated useful lives			15 years
Construction in progress
Property and Equipment
Property and equipment, gross	272		$ 272	518
Office property and equipment
Property and Equipment
Property and equipment, gross	293		$ 293	269
Office property and equipment \| Minimum
Property and Equipment
Estimated useful lives			2 years
Office property and equipment \| Maximum
Property and Equipment
Estimated useful lives			50 years
Land and other
Property and Equipment
Property and equipment, gross	$ 342		$ 342	427
Property and equipment
Property and Equipment
Capitalized interest			$ 8	$ 14	$ 21