Consolidated Statements of Equity - USD ($)	Total	Common Stock [member]	Additional Paid-in Capital [member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [member]	Net Parent Investment [Member]	Non-Controlling Interests [member]
Balance at Dec. 31, 2016	$ 3,823,000,000				$ (67,000,000)	$ 3,939,000,000	$ (49,000,000)
Net transfers to Parent	$ (13,000,000)					(13,000,000)
Issuance of common stock and reclassification of former Parent investment		$ 2,000,000	$ 3,924,000,000			$ (3,926,000,000)
Issuance of common stock and reclassification of former Parent investment (shares)		198,000,000
Issuance of common stock (Shares)	441
Share-based compensation, net	$ 11,000,000		11,000,000
Share-based compensation, net (Shares)		1,000,000
Net income	2,631,000,000			$ 2,625,000,000			6,000,000
Other comprehensive income	22,000,000				22,000,000
Dividends and dividend equivalents	(506,000,000)		(110,000,000)	(396,000,000)
Dividends and dividend equivalents (Shares)		16,000,000
Distributions to noncontrolling interests	(6,000,000)						(6,000,000)
Balance at Dec. 31, 2017	5,962,000,000	$ 2,000,000	3,825,000,000	2,229,000,000	(45,000,000)		(49,000,000)
Balance (shares) at Dec. 31, 2017		215,000,000
Net transfers to Parent	0
Share-based compensation, net	14,000,000		14,000,000
Net income	477,000,000			472,000,000			5,000,000
Other comprehensive income	39,000,000				39,000,000
Dividends and dividend equivalents	(556,000,000)			(556,000,000)
Repurchase of common stock	(348,000,000)		(250,000,000)	(98,000,000)
Repurchases of common stock (Shares)		(14,000,000)
Distributions to noncontrolling interests	(2,000,000)						(2,000,000)
Balance at Dec. 31, 2018	$ 5,586,000,000	$ 2,000,000	3,589,000,000	2,047,000,000	(6,000,000)		(46,000,000)
Balance (shares) at Dec. 31, 2018	201,198,381	201,000,000
Net transfers to Parent	$ 0
Issuance of common stock	$ 978,000,000		978,000,000
Issuance of common stock (Shares)	978	38,000,000
Share-based compensation, net	$ 8,000,000		8,000,000
Net income	316,000,000			306,000,000			10,000,000
Other comprehensive income	3,000,000				3,000,000
Dividends and dividend equivalents	(423,000,000)			(423,000,000)
Distributions to noncontrolling interests	(9,000,000)						(9,000,000)
Cumulative effective of change in accounting principle	(8,000,000)			(8,000,000)
Balance at Dec. 31, 2019	$ 6,451,000,000	$ 2,000,000	$ 4,575,000,000	$ 1,922,000,000	$ (3,000,000)		$ (45,000,000)
Balance (shares) at Dec. 31, 2019	239,386,877	239,000,000