Long-Term Incentive - Rollforward of Outstanding RSUs and PSUs (Details) - RSUs and PSUs [Member] - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding as of January 1	0.7	0.7	0.8
Granted	0.3	0.3	0.3
Vested and issued	(0.2)	(0.3)	(0.3)
Forfeited	(0.1)	0.0	(0.1)
Outstanding as of December 31	0.7	0.7	0.7
Vested pending issuance	0.1	0.1	0.1
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding as of January 1	$ 76.36	$ 71.21	$ 59.25
Granted	99.33	77.72	90.14
Vested and issued	69.91	66.20	57.36
Forfeited	77.20	0	68.18
Outstanding as of December 31	88.40	76.36	71.21
Vested pending issuance	$ 98.67	$ 63.88	$ 65.25