Net Income Per Share - Reconciliation between Basic and Diluted Weighted Average Shares Outstanding (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Net Income (Loss)	$ 257	$ 190	$ 550	$ 426
Net income attributable to unvested awarded performance stock	(3)	(3)	(6)	(7)
Net income attributable to common shares	$ 254	$ 187	$ 544	$ 419
Weighted average number of common shares outstanding – basic	285	283	285	284
Less unvested awarded performance stock included in weighted average number of common shares outstanding - basic	(3)	(4)	(4)	(5)
Weighted average number of common shares outstanding for basic net income per common share	282	279	281	279
Dilutive effect of potentially issuable common shares	1	1	2	1
Weighted average number of shares outstanding – diluted	283	280	283	280
Basic (in dollars per share)	$ 0.9	$ 0.67	$ 1.93	$ 1.5
Diluted (in dollars per share)	$ 0.9	$ 0.67	$ 1.92	$ 1.5