Income Taxes - Schedule of Income Taxed Paid, Net (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Effective Income Tax Rate Reconciliation [Line Items]
US Federal		$ 169.3	$ 97.9	$ 173.2
Total US State and Local		38.7	39.2	83.8
Total Foreign		218.8	131.5	105.5
Total Income Taxes Paid	[1]	426.8	268.6	362.5
Illinois
Effective Income Tax Rate Reconciliation [Line Items]
Total US State and Local			21.7	42.0
New Jersey
Effective Income Tax Rate Reconciliation [Line Items]
Total US State and Local			(17.6)
Other
Effective Income Tax Rate Reconciliation [Line Items]
Total US State and Local		38.7	35.1	41.8
United Kingdom
Effective Income Tax Rate Reconciliation [Line Items]
Total Foreign		122.6	43.4	43.2
AUSTRALIA
Effective Income Tax Rate Reconciliation [Line Items]
Total Foreign		25.2
Luxembourg
Effective Income Tax Rate Reconciliation [Line Items]
Total Foreign			32.3
India
Effective Income Tax Rate Reconciliation [Line Items]
Total Foreign			18.3
Other
Effective Income Tax Rate Reconciliation [Line Items]
Total Foreign		$ 71.0	$ 37.5	$ 62.3

[1] See Note 20, “Income Taxes” for additional information.