Other Property and Equipment - Held for Use and Estimated Useful Lives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 1,810	$ 1,721
Total other property and equipment, at cost	1,810
Less: accumulated depreciation	(692)
Less: accumulated depreciation		(630)
Total other property and equipment, net		1,091
Total other property and equipment, net	1,118
Accumulated amortization	10
Accumulated depreciation		630
Buildings and improvements
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 1,058	1,053
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	$ 355	353
Estimated useful life	5 years
Sand mine
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 78	0
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 [Line Items]
Finance Lease, Right-of-Use Asset, before Accumulated Amortization	$ 27
Property, Plant and Equipment [Abstract]
Other property and equipment		48
Total other property and equipment, at cost	$ 48
Compressor | Minimum
Property, Plant and Equipment [Abstract]
Estimated useful life	3 years
Compressor | Maximum
Property, Plant and Equipment [Abstract]
Estimated useful life	20 years
Natural gas compressors
Property, Plant and Equipment [Abstract]
Other property and equipment		27
Less: accumulated depreciation		(1)
Accumulated depreciation		1
Land
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 115	106
Other
Property, Plant and Equipment [Abstract]
Other property and equipment	$ 156	$ 161
Other | Minimum
Property, Plant and Equipment [Abstract]
Estimated useful life	5 years
Other | Maximum
Property, Plant and Equipment [Abstract]
Estimated useful life	20 years