Equity Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity compensation expense	$ 35	$ 31
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	129,146
Stock appreciation rights granted, weighted average exercise price (per share)	$ 138.34
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	1,638,062
Options exercisable, weighted average price (per share)	$ 114.32
Options, remaining term	4 years 1 month 6 days
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 37
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	8 months 12 days
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	185,311
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	105,122

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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