Summary of Significant Accounting Policies (Schedule of Other Property Plant and Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Other property and equipment, net	$ 1,632	$ 1,291
Accumulated depreciation property, plant and equipment, other assets	382	854
Land and buildings (a)
Property, Plant and Equipment [Line Items]
Other property and equipment, net	877	380
Proved and unproved sand properties (e)
Property, Plant and Equipment [Line Items]
Other property and equipment, net	16	36
Water infrastructure
Property, Plant and Equipment [Line Items]
Other property and equipment, net	404	343
Transportation Equipment [Member]
Property, Plant and Equipment [Line Items]
Other property and equipment, net	35	50
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Other property and equipment, net	120	143
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Other property and equipment, net	0	13
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Other property and equipment, net	28	15
Construction in Progress and Capitalized Interest [Member]
Property, Plant and Equipment [Line Items]
Other property and equipment, net	$ 152	$ 311