Earnings Per Share (Reconciliation of the Numerators and Denominators of the Basic and Diluted Per Shares) (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
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net income (numerator for basic and diluted calculations)	$ 253	$ 156	$ 719	$ 569
Shares:
Weighted average outstanding shares (denominator for basic calculation)	66	66	66	66
Equivalent shares from outstanding stock awards	1	1	1	1
Denominator for diluted calculation	67	67	67	67
Diluted earnings per share	$ 3.81	$ 2.33	$ 10.78	$ 8.53
Basic earnings per share	$ 3.85	$ 2.37	$ 10.89	$ 8.64
Net Income (Loss) Attributable to Noncontrolling Interest	$ 2	$ 2	$ 5	$ 5
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 255	$ 158	$ 724	$ 574