CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Revision of Prior Period, Adjustment	Revision of Prior Period, Adjusted Balance	Adoption of ASC 326	Balance, January 1, 2020, as recast	Common Shares	Common Shares Revision of Prior Period, Adjusted Balance	Common Shares Balance, January 1, 2020, as recast	Treasury Stock	Treasury Stock Revision of Prior Period, Adjusted Balance	Treasury Stock Balance, January 1, 2020, as recast	Additional Paid-in Capital	Additional Paid-in Capital Revision of Prior Period, Adjustment	Additional Paid-in Capital Revision of Prior Period, Adjusted Balance	Additional Paid-in Capital Balance, January 1, 2020, as recast	Retained Earnings	Retained Earnings Revision of Prior Period, Adjustment	Retained Earnings Revision of Prior Period, Adjusted Balance	Retained Earnings Adoption of ASC 326	Retained Earnings Balance, January 1, 2020, as recast	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Revision of Prior Period, Adjustment	Accumulated Other Comprehensive Income (Loss) Revision of Prior Period, Adjusted Balance	Accumulated Other Comprehensive Income (Loss) Balance, January 1, 2020, as recast	Noncontrolling Interests	Noncontrolling Interests Revision of Prior Period, Adjustment	Noncontrolling Interests Revision of Prior Period, Adjusted Balance	Noncontrolling Interests Balance, January 1, 2020, as recast	Redeemable Noncontrolling Interest	Redeemable Noncontrolling Interest Revision of Prior Period, Adjusted Balance	Redeemable Noncontrolling Interest Balance, January 1, 2020, as recast
Beginning balance at Dec. 31, 2019	$ 6,121			$ (36)	$ 6,085	$ 25		$ 25	$ (154)		$ (154)	$ 4,404			$ 4,404	$ 3,808			$ (36)	$ 3,772	$ (2,002)			$ (2,002)	$ 40			$ 40
Stockholders' Equity
Net income (loss), excluding redeemable noncontrolling interests	(451)															(493)									42
Other comprehensive income (loss), net of tax	(670)																				(674)				4
Reclassification of certain tax effects																					0
Dividends paid	0																												$ (8)
Decrease in noncontrolling interest due to the change of ownership	(9)											(5)													(4)
Common shares issued from treasury stock and capital increase for share-based compensation	(2)								45			(47)
Share-based compensation expense	38											38
Other changes	(2)											(2)													0
Ending balance at Dec. 31, 2020	4,989					25			(109)			4,388				3,279					(2,676)				82
Beginning balance, redeemable noncontrolling interest at Dec. 31, 2019																													35		$ 35
Redeemable Noncontrolling Interest
Net income (loss), redeemable noncontrolling interests																													13
Ending balance, redeemable noncontrolling interest at Dec. 31, 2020																													40
Stockholders' Equity
Net income (loss), excluding redeemable noncontrolling interests	1,748															1,723									25
Other comprehensive income (loss), net of tax	237																				231				6
Dividends paid	(271)															(180)									(91)				(7)
Common shares issued from treasury stock and capital increase for share-based compensation	0								25			(25)
Share-based compensation expense	99											99
Other changes	6											2				(4)									8
Ending balance at Dec. 31, 2021	6,808	$ (1,654)	$ 5,154			25	$ 25		(84)	$ (84)		4,464	$ (3,044)	$ 1,420		4,818	$ 1,464	$ 6,282			(2,445)	$ (52)	$ (2,497)		30	$ (22)	$ 8
Redeemable Noncontrolling Interest
Net income (loss), redeemable noncontrolling interests																													12
Ending balance, redeemable noncontrolling interest at Dec. 31, 2021	45																												45	$ 45
Stockholders' Equity
Net income (loss), excluding redeemable noncontrolling interests	2,023															2,029									(6)
Other comprehensive income (loss), net of tax	218																				219				(1)
Dividends paid	(412)															(412)													(11)
Acquisition of treasury stock	(153)								(153)
Common shares issued from treasury stock and capital increase for share-based compensation	0								7			(7)
Share-based compensation expense	87											87
Other changes	10											4				7									(1)				(1)
Ending balance at Dec. 31, 2022	6,927					$ 25			$ (230)			$ 1,504				$ 7,906					$ (2,278)				$ 0
Redeemable Noncontrolling Interest
Net income (loss), redeemable noncontrolling interests																													16
Ending balance, redeemable noncontrolling interest at Dec. 31, 2022	$ 49																												$ 49