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
	Mar. 31, 2025	Mar. 31, 2024
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net income (numerator for basic and diluted calculations)	$ 286	$ 210
Shares:
Weighted average outstanding shares (denominator for basic calculation)	66	66
Equivalent shares from outstanding stock awards	1	1
Denominator for diluted calculation	67	67
Diluted earnings per share	$ 4.27	$ 3.16
Basic earnings per share	$ 4.33	$ 3.20
Net income attributable to noncontrolling interest	$ 2	$ 2
Net income	$ 288	$ 212