Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Beginning Balance (in shares) at Dec. 31, 2020		193,771,000
Beginning Balance at Dec. 31, 2020	$ 12,589	$ 5,406	$ 7,156	$ (137)	$ 164
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	397		397		0
Dividends declared on common stock	(210)		(210)
Repurchase of common stock (in shares)		(430,000)
Repurchase of common stock	(54)	$ (54)
Other comprehensive income (loss) , net of tax	3			3
Stock-based compensation, net distributions to noncontrolling interests, and other (in shares)		386,000
Stock-based compensation, net distributions to noncontrolling interests, and other	(11)	$ (8)	(1)		(2)
Ending Balance (in shares) at Mar. 31, 2021		193,727,000
Ending Balance at Mar. 31, 2021	$ 12,714	$ 5,344	7,342	(134)	162
Beginning Balance (in shares) at Dec. 31, 2021	193,747,509	193,748,000
Beginning Balance at Dec. 31, 2021	$ 8,713	$ 5,379	3,438	(112)	8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	394		394
Dividends declared on common stock	(171)		(171)
Repurchase of common stock (in shares)		(465,000)
Repurchase of common stock	(55)	$ (55)
Other comprehensive income (loss) , net of tax	3			3
Stock-based compensation, net distributions to noncontrolling interests, and other (in shares)		456,000
Stock-based compensation, net distributions to noncontrolling interests, and other	$ (17)	$ (14)	1		(4)
Ending Balance (in shares) at Mar. 31, 2022	193,739,166	193,739,000
Ending Balance at Mar. 31, 2022	$ 8,867	$ 5,310	$ 3,662	$ (109)	$ 4