Borrowings - Schedule of Senior Notes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2014	Mar. 31, 2013
Debt Instrument [Line Items]
Interest Expense	$ 27.4	$ 18.4	$ 82.7	$ 53.0
3.500% Senior Notes Due 9/19/2029
Debt Instrument [Line Items]
Interest rate (percent)	3.50%		3.50%
5.050% Senior Notes Due 9/19/2035
Debt Instrument [Line Items]
Interest rate (percent)	5.05%		5.05%
5.625% Senior Notes Due 3/30/2043
Debt Instrument [Line Items]
Interest rate (percent)	5.625%		5.625%
5.650% Senior Notes Due 9/15/2048
Debt Instrument [Line Items]
Interest rate (percent)	5.65%		5.65%
Senior Notes \| 3.500% Senior Notes Due 9/19/2029
Debt Instrument [Line Items]
Interest rate (percent)	3.50%		3.50%
Aggregate Principal Amount	$ 425.0		$ 425.0
Fair Value	400.3		400.3		$ 417.8
Interest Expense	$ 3.8	3.8	$ 11.5	11.5
Senior notes percentage of par value (percent)						99.841%
Senior Notes \| 5.050% Senior Notes Due 9/19/2035
Debt Instrument [Line Items]
Interest rate (percent)	5.05%		5.05%
Aggregate Principal Amount	$ 800.0		$ 800.0
Fair Value	726.3		726.3		800.9
Interest Expense	10.3	$ 1.3	31.0	$ 1.3
Senior notes percentage of par value (percent)		99.767%		99.767%
Senior Notes \| 5.625% Senior Notes Due 3/30/2043
Debt Instrument [Line Items]
Aggregate Principal Amount	600.0		600.0					$ 200.0	$ 400.0
Fair Value	533.3		533.3		600.7
Interest Expense	8.4	$ 8.4	25.3	$ 25.3
Senior notes percentage of par value (percent)								104.315%	99.583%
Senior Notes \| 5.650% Senior Notes Due 9/15/2048
Debt Instrument [Line Items]
Aggregate Principal Amount	350.0		350.0
Fair Value	307.6		307.6		$ 347.5
Interest Expense	$ 4.9	$ 4.9	$ 14.9	$ 14.9
Senior notes percentage of par value (percent)							99.914%