Equity Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity compensation expense	$ 22	$ 17
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	1,664,556
Options exercisable, weighted average price (per share)	$ 113.93
Options, remaining term	4 years 3 months 18 days
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 49
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	10 months 24 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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