Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2020		Jun. 30, 2019		Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ (402)		$ 74		$ (283)	$ 114
Income (loss) from continuing operations before income taxes	$ (2,083)		151		$ (2,979)	343
Effective tax rate	19.30%				9.50%
Impairments and other charges	$ 2,147	[1]	247	[1]	$ 3,220	308
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount					686
Deferred Tax Assets, Valuation Allowance	310				310
Loss on early extinguishment of debt	$ 0	[2]	$ 0		$ (168)	$ 0

[1] For the three months ended June 30, 2020, amount includes approximately $1.4 billion attributable to Completion and Production, $770 million attributable to Drilling and Evaluation, and $25 million attributable to Corporate and other. For the three months ended June 30, 2019, amount includes $77 million attributable to Completion and Production, $142 million attributable to Drilling and Evaluation, and $28 million attributable to Corporate and other. For the six months ended June 30, 2020, amount includes $2.1 billion attributable to Completion and Production, $1.0 billion attributable to Drilling and Evaluation, and $41 million attributable to Corporate and other. For the six months ended June 30, 2019, amount includes $127 million attributable to Completion and Production, $153 million attributable to Drilling and Evaluation, and $28 million attributable to Corporate and other. See Note 2 for further discussion on these impairments and other charges.

[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. See Note 6 for further discussion on this charge.