Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common equities	Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock
Beginning Balance at Dec. 31, 2020		$ 397	$ 1,328	$ 10,085	$ 769	$ (1,790)
Share-based awards		0	(13)			16
Share-based compensation			25
Other			4			1
Net Income (Loss)	$ 1,476			1,476
Dividends declared				(304)
Other comprehensive loss	(106)				(106)
Shares acquired - share repurchase authorization						(40)
Shares acquired - share-based compensation plans						(7)
Ending Balance at Sep. 30, 2021	11,841	$ 397	1,344	11,257	663	(1,820)
Beginning Balance (in shares) at Dec. 31, 2020		160.9
Share-based awards (in shares)		0.6
Shares acquired - share repurchase authorization (in shares)		(0.4)
Ending Balance (in shares) at Sep. 30, 2021		161.1
Dividends declared per common share		$ 1.89
Beginning Balance at Jun. 30, 2021		$ 397	1,334	11,205	731	(1,809)
Share-based awards		0	1			1
Share-based compensation			8
Other			1			0
Net Income (Loss)	153			153
Dividends declared				(101)
Other comprehensive loss	(68)				(68)
Shares acquired - share repurchase authorization						(12)
Shares acquired - share-based compensation plans						0
Ending Balance at Sep. 30, 2021	11,841	$ 397	1,344	11,257	663	(1,820)
Beginning Balance (in shares) at Jun. 30, 2021		161.1
Share-based awards (in shares)		0.1
Shares acquired - share repurchase authorization (in shares)		(0.1)
Ending Balance (in shares) at Sep. 30, 2021		161.1
Dividends declared per common share		$ 0.63
Beginning Balance at Dec. 31, 2021	13,105	$ 397	1,356	12,625	648	(1,921)
Share-based awards		0	(11)			13
Share-based compensation			29
Other			5			1
Net Income (Loss)	(1,499)			(1,499)
Dividends declared				(329)
Other comprehensive loss	(1,476)				(1,476)
Shares acquired - share repurchase authorization						(399)
Shares acquired - share-based compensation plans						(8)
Ending Balance at Sep. 30, 2022	9,431	$ 397	1,379	10,797	(828)	(2,314)
Beginning Balance (in shares) at Dec. 31, 2021		160.3
Share-based awards (in shares)		0.5
Shares acquired - share repurchase authorization (in shares)		(3.7)
Ending Balance (in shares) at Sep. 30, 2022		157.1
Dividends declared per common share		$ 2.07
Beginning Balance at Jun. 30, 2022		$ 397	1,367	11,324	(423)	(2,112)
Share-based awards		0	1			1
Share-based compensation			9
Other			2			0
Net Income (Loss)	(418)			(418)
Dividends declared				(109)
Other comprehensive loss	(405)				(405)
Shares acquired - share repurchase authorization						(203)
Shares acquired - share-based compensation plans						0
Ending Balance at Sep. 30, 2022	$ 9,431	$ 397	$ 1,379	$ 10,797	$ (828)	$ (2,314)
Beginning Balance (in shares) at Jun. 30, 2022		159.2
Share-based awards (in shares)		0.0
Shares acquired - share repurchase authorization (in shares)		(2.1)
Ending Balance (in shares) at Sep. 30, 2022		157.1
Dividends declared per common share		$ 0.69