Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021		Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 52		$ 119
Income (loss) from continuing operations before income taxes	223		(896)
Impairments and other charges	0	[1]	1,073
Loss on early extinguishment of debt	$ 0		$ (168)	[2]

[1] For the three months ended March 31, 2020, amount includes approximately $780 million attributable to Completion and Production, $277 million attributable to Drilling and Evaluation, and $16 million attributable to Corporate and other.

[2] For the three months ended March 31, 2020, amount includes a $168 million loss on extinguishment of debt related to the early repurchase of senior notes.