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		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net income (numerator for basic and diluted calculations)	$ 203	$ 205	$ 413	$ 457
Shares:
Weighted average outstanding shares (denominator for basic calculation)	66	67	66	67
Equivalent shares from outstanding stock awards	1	1	1	1
Denominator for diluted calculation	67	68	67	68
Diluted earnings per share	$ 3.03	$ 3.05	$ 6.19	$ 6.77
Basic earnings per share	$ 3.07	$ 3.09	$ 6.28	$ 6.86
Net Income (Loss) Attributable to Noncontrolling Interest	$ 1	$ 2	$ 3	$ 3
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 204	$ 207	$ 416	$ 460