Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Millions	Total	Common equities	Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock
Beginning Balance at Dec. 31, 2022		$ 397	$ 1,392	$ 11,711	$ (614)	$ (2,324)
Share-based awards		0	(6)			7
Share-based compensation			12
Other			0
Net Income	$ 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		157,100
Share-based awards (in shares)		300
Shares acquired - share repurchase authorization (in shares)		(200)
Shares acquired during period, Employee Share-Based Compensation Plans, Shares		0
Ending Balance (in shares) at Mar. 31, 2023		157,200
Dividends declared per common share (in dollars per share)		$ 0.75
Beginning Balance at Dec. 31, 2023	12,098	$ 397	1,437	13,084	(435)	(2,385)
Share-based awards		0	(6)			8
Share-based compensation			14
Other			1
Net Income	755			755
Dividends declared				(127)
Other comprehensive income (loss)	(7)				(7)
Shares acquired - share repurchase authorization						(75)
Shares acquired - share-based compensation plans						(7)
Ending Balance at Mar. 31, 2024	$ 12,654	$ 397	$ 1,446	$ 13,712	$ (442)	$ (2,459)
Beginning Balance (in shares) at Dec. 31, 2023		157,000
Share-based awards (in shares)		300
Shares acquired - share repurchase authorization (in shares)		(700)
Shares acquired during period, Employee Share-Based Compensation Plans, Shares		(100)
Ending Balance (in shares) at Mar. 31, 2024		156,500
Dividends declared per common share (in dollars per share)		$ 0.81