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Earnings Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Earnings Per Share [Abstract]
Net Income (Loss)	$ 331	$ 141	$ 566	$ 331
Basic average number of shares outstanding (shares)	99	103	100	103
Dilutive effect of potentially issuable shares (shares)	1	0	0	1
Diluted average number of shares outstanding (shares)	100	103	100	104
Basic earnings per share	$ 3.34	$ 1.37	$ 5.68	$ 3.22
Dilutive effect of potentially issuable shares (USD per share)	(0.02)	(0.01)	(0.04)	(0.02)
Diluted earnings per share	$ 3.32	$ 1.36	$ 5.64	$ 3.2

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