Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021		Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 65		$ (402)	$ 117		$ (283)
Income (loss) from continuing operations before income taxes	295		(2,083)	518		(2,979)
Impairments and other charges	0	[1]	2,147	0	[1]	3,220	[1]
Loss on early extinguishment of debt	$ 0		$ 0	$ 0		$ (168)	[2]

[1] For the three and six months ended June 30, 2020, amount includes approximately $1.4 billion and $2.1 billion attributable to Completion and Production, $770 million and $1.0 billion attributable to Drilling and Evaluation, and $25 million and $41 million attributable to Corporate and other, respectively.

[2] For the six months ended June 30, 2020, amount includes a $168 million loss on extinguishment of debt related to the early repurchase of senior notes.