Other Property and Equipment - Held for Use and Estimated Useful Lives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 1,754	$ 1,810
Total other property and equipment, at cost	1,754	1,810
Less: accumulated depreciation	(799)	(692)
Total other property and equipment, net	955	1,118
Buildings and improvements
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 1,038	1,058
Buildings and improvements | Minimum
Property, Plant and Equipment [Abstract]
Estimated Useful Life	10 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Abstract]
Estimated Useful Life	39 years
Computer equipment
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 356	355
Estimated Useful Life	5 years
Sand mine
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 81	78
Sand mine | Minimum
Property, Plant and Equipment [Abstract]
Estimated Useful Life	10 years
Sand mine | Maximum
Property, Plant and Equipment [Abstract]
Estimated Useful Life	30 years
Compressor
Property, Plant and Equipment [Abstract]
Total other property and equipment, at cost	$ 36	48
Assets under finance lease	27	10
Assets under finance lease, accumulated amortization	$ 18
Compressor | Minimum
Property, Plant and Equipment [Abstract]
Estimated Useful Life	3 years
Compressor | Maximum
Property, Plant and Equipment [Abstract]
Estimated Useful Life	20 years
Land
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 113	115
Other
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 130	$ 156
Other | Minimum
Property, Plant and Equipment [Abstract]
Estimated Useful Life	5 years
Other | Maximum
Property, Plant and Equipment [Abstract]
Estimated Useful Life	20 years