Earnings/(Loss) Per Share - Basic and Diluted Earnings/(loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings Per Share [Abstract]
Net Income (Loss)	$ 304	$ (1,675)	$ 870	$ (1,344)
Basic average number of shares outstanding (shares)	98	102	99	103
Dilutive effect of potentially issuable shares (shares)	0	0	1	0
Diluted average number of shares outstanding (shares)	98	102	100	103
Basic earnings/(loss) per share	$ 3.12	$ (16.44)	$ 8.8	$ (13.11)
Dilutive effect of potentially issuable shares (USD per share)	(0.01)	0	(0.06)	0
Diluted earnings/(loss) per share	$ 3.11	$ (16.44)	$ 8.74	$ (13.11)