Acquisitions and Divestment - Schedules (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 20, 2018	Dec. 18, 2018	Oct. 16, 2018	Aug. 01, 2018	Apr. 25, 2018	Apr. 02, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill	$ 1,555	$ 1,559							$ 1,430
American Midstream Partners, LP [Member]
Business Acquisition [Line Items]
Current assets			$ 3
Property and equipment			41
Intangible assets			40
Goodwill	43		43
Other noncurrent assets			2
Current liabilities			(2)
Deferred tax liabilities			0
Other noncurrent liabilities			0
Total			$ 127
Schmitt Sales, Inc. [Member]
Business Acquisition [Line Items]
Current assets				$ 4
Property and equipment				20
Intangible assets				16
Goodwill	$ 6			6
Other noncurrent assets				0
Current liabilities				0
Deferred tax liabilities				0
Other noncurrent liabilities				0
Total				$ 46
BRENCO [Member]
Business Acquisition [Line Items]
Current assets					$ 2
Property and equipment					7
Intangible assets					12
Goodwill					5
Other noncurrent assets					0
Current liabilities					0
Deferred tax liabilities					0
Other noncurrent liabilities					0
Total					$ 26
Sandford Oil [Member]
Business Acquisition [Line Items]
Current assets						$ 37
Property and equipment						13
Intangible assets						36
Goodwill						31
Other noncurrent assets						0
Current liabilities						(13)
Deferred tax liabilities						(11)
Other noncurrent liabilities						0
Total						$ 93
Superior Plus Corporation [Member]
Business Acquisition [Line Items]
Current assets							$ 19
Property and equipment							20
Intangible assets							12
Goodwill							10
Other noncurrent assets							0
Current liabilities							(1)
Deferred tax liabilities							0
Other noncurrent liabilities							(2)
Total							$ 58
7-Eleven Purchase [Member]
Business Acquisition [Line Items]
Current assets								$ 4
Property and equipment								20
Intangible assets								0
Goodwill								30
Other noncurrent assets								0
Current liabilities								0
Deferred tax liabilities								0
Other noncurrent liabilities								0
Total								$ 54