Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common equities	Paid-In Capital	Retained Earnings	Retained Earnings As originally reported	Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income As originally reported	Treasury Stock
Effect of ASU 2018-12 adoption on opening retained earnings				$ (10)
Effect of ASU 2018-12 adoption on opening accumulated other comprehensive income						$ (352)
Beginning Balance at Dec. 31, 2021		$ 397	$ 1,356	12,635	$ 12,625	296	$ 648	$ (1,921)
Share-based awards		0	(14)					9
Share-based compensation			11
Other			1
Net Income (Loss)	$ (266)			(266)
Dividends declared				(111)
Other comprehensive income (loss)	(434)					(434)
Shares acquired - share repurchase authorization								(45)
Shares acquired - share-based compensation plans								(2)
Ending Balance at Mar. 31, 2022	11,912	$ 397	1,354	12,258		(138)		(1,959)
Beginning Balance (in shares) at Dec. 31, 2021		160.3
Share-based awards (in shares)		0.4
Shares acquired - share repurchase authorization (in shares)		(0.4)
Ending Balance (in shares) at Mar. 31, 2022		160.3
Dividends declared per common share (in dollars per share)		$ 0.69
Effect of ASU 2018-12 adoption on opening retained earnings				0
Effect of ASU 2018-12 adoption on opening accumulated other comprehensive income						0
Beginning Balance at Dec. 31, 2022	10,562	$ 397	1,392	11,711	$ 11,711	(614)	$ (614)	(2,324)
Share-based awards		0	(6)					7
Share-based compensation			12
Other			0
Net Income (Loss)	225			225
Dividends declared				(118)
Other comprehensive income (loss)	87					87
Shares acquired - share repurchase authorization								(25)
Shares acquired - share-based compensation plans								(3)
Ending Balance at Mar. 31, 2023	$ 10,741	$ 397	$ 1,398	$ 11,818		$ (527)		$ (2,345)
Beginning Balance (in shares) at Dec. 31, 2022		157.1
Share-based awards (in shares)		0.3
Shares acquired - share repurchase authorization (in shares)		(0.2)
Ending Balance (in shares) at Mar. 31, 2023		157.2
Dividends declared per common share (in dollars per share)		$ 0.75