Impairments - Fixed Assets and Other Table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Asset impairment	$ 89	$ 3	$ 53
Sand mine
Property, Plant and Equipment [Line Items]
Asset impairment	76	0	0
Natural gas compressors
Property, Plant and Equipment [Line Items]
Asset impairment	13	0	45
Buildings and land
Property, Plant and Equipment [Line Items]
Asset impairment	0	1	4
Other
Property, Plant and Equipment [Line Items]
Asset impairment	$ 0	$ 2	$ 4