Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 41	$ (101)	$ 88	$ (195)
Earnings (loss) before income taxes and noncontrolling interests	$ 58	$ (441)	$ 192	(1,361)
Tax beenefit relating to valuation allowance				111
Asset impairments				$ 883
Decrease in UTB that is reasonably possible					$ 43
Unrecognized tax benefits					54
Valuation Allowance					$ 54