Consolidated Statements of Changes in Equity - USD ($) $ in Millions		Total	Cumulative Effect, Period of Adoption, Adjustment	Total Stockholders' Equity	Total Stockholders' Equity Cumulative Effect, Period of Adoption, Adjustment	Common Stock		Additional paid-in capital	Treasury Stock	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interests
Balance at beginning of period (in shares) at Dec. 31, 2019	[1]					309,005,272
Balance at beginning of period at Dec. 31, 2019		$ 15,539	$ (1)	$ 15,190	$ (1)	$ 3		$ 13,660	$ (12)	$ 1,634	$ (1)	$ (95)	$ 349
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		539		581						581			(42)
Other comprehensive income (loss), net of tax		(16)		(16)								(16)
Comprehensive Income		523
Dividends declared		(545)		(545)						(545)
Release of common stock held in trust (in shares)	[1]					72,028
Issuance of common stock (in shares)	[1]					42,777
Issuance of common stock		(1)		(1)				(1)
Repurchase of common stock (in shares)	[1]					(42,777)
Repurchase of common stock		(2)		(2)					(2)
Stock-based compensation		6		6				6
Distributions to noncontrolling interests		(5)											(5)
Contributions from noncontrolling interests		312		(3)						(3)			315
Balance at end of period (in shares) at Dec. 31, 2020	[1]					309,077,300
Balance at end of period at Dec. 31, 2020		15,826		15,209		$ 3		13,665	(14)	1,666		(111)	617
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		643		707						707			(64)
Other comprehensive income (loss), net of tax		(162)		(162)								(162)
Comprehensive Income		481
Dividends declared		$ (647)		(647)						(647)
Release of common stock held in trust (in shares)		301,239				301,239	[1]
Issuance of common stock (in shares)	[1]					77,883,713
Issuance of common stock		$ 3,998		3,998				3,998
Repurchase of common stock (in shares)	[1]					(694,148)
Repurchase of common stock		(33)		(33)					(33)
Stock-based compensation		16		16				16
Distributions to noncontrolling interests		(10)											(10)
Contributions from noncontrolling interests		$ 330		(12)						(12)			342
Balance at end of period (in shares) at Dec. 31, 2021		386,568,104				386,568,104	[1]
Balance at end of period at Dec. 31, 2021		$ 19,961		19,076		$ 3		17,679	(47)	1,714		(273)	885
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		821		881						881			(60)
Other comprehensive income (loss), net of tax		93		93								93
Comprehensive Income		914
Dividends declared		$ (681)		(681)						(681)
Release of common stock held in trust (in shares)		4,355				4,355	[1]
Issuance of common stock (in shares)	[1]					56,127
Issuance of common stock		$ (1)		(1)				(1)
Stock-based compensation		16		16				16
Distributions to noncontrolling interests		(10)											(10)
Contributions from noncontrolling interests		$ 143		(4)						(4)			147
Balance at end of period (in shares) at Dec. 31, 2022		386,628,586				386,628,586	[1]
Balance at end of period at Dec. 31, 2022		$ 20,342		$ 19,380		$ 3		$ 17,694	$ (47)	$ 1,910		$ (180)	$ 962

[1] Par value of share amounts is $.01