Consolidated Statement of Stockholders' Equity - USD ($) $ in Millions	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (Accounting Standards Update 2016-01 [Member]) at Dec. 31, 2017	$ 2	$ (2)
Balance at Dec. 31, 2017						$ 2	$ 2,354	$ 86	$ (87)	$ (1,342)	$ 1,013	$ 101	$ 1,114
Net income (loss)								427			427	13	440
Other comprehensive income (loss)										(18)	(18)	(6)	(24)
Common stock dividends							1
Common stock dividends								(59)			(58)		(58)
Distributions to noncontrolling interests												(42)	(42)
Purchase of noncontrolling interests							(9)				(9)
Purchase of noncontrolling interests												9
Purchase of redeemable noncontrolling interests							2				2		2
Contribution from noncontrolling interest												22	22
Common stock share repurchases									(25)		(25)		(25)
Stock compensation							20				20		20
Stock withheld for employees taxes									(7)		(7)		(7)
Balance (Accounting Standards Update 2016-02 [Member]) at Dec. 31, 2018	(1)		$ (1)	$ (1)
Balance at Dec. 31, 2018						2	2,368	456	(119)	(1,362)	1,345	97	1,442
Net income (loss)								226			226	13	239
Other comprehensive income (loss)										375	375	(4)	371
Common stock dividends							1
Common stock dividends								(59)			(58)		(58)
Distributions to noncontrolling interests												(19)	(19)
Common stock share repurchases									(25)		(25)		(25)
Stock compensation							17				17		17
Stock withheld for employees taxes									(6)		(6)		(6)
Increase from business combination												8	8
Balance (Accounting Standards Update 2016-13 [Member]) at Dec. 31, 2019	$ (1)		$ (1)	$ (1)
Balance at Dec. 31, 2019						2	2,386	622	(150)	(987)	1,873	95	1,968
Net income (loss)								(31)			(31)	10	(21)
Other comprehensive income (loss)										(40)	(40)	17	(23)
Common stock dividends								(15)			(15)		(15)
Distributions to noncontrolling interests												(11)	(11)
Purchase of noncontrolling interests							10				10	(23)	(13)
Stock compensation							12				12		12
Stock withheld for employees taxes									(6)		(6)		(6)
Sale of noncontrolling interests											0	2	2
Redeemable noncontrolling interests adjustment to redemption value								(38)			(38)		(38)
Deconsolidation of non-wholly owned subsidiary								(7)		1	(6)	(14)	(20)
Balance at Dec. 31, 2020						$ 2	$ 2,408	$ 530	$ (156)	$ (1,026)	$ 1,758	$ 76	$ 1,834