Income Taxes (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)		$ 119	$ 40
Income (loss) from continuing operations before income taxes		$ (896)	192
Effective tax rate		(13.30%)
Impairments and other charges	[1]	$ 1,073	$ 61
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount		268
Deferred Tax Assets, Valuation Allowance		$ 310

[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. See Note 2 for further discussion on these impairments and other charges.