Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax beginning balance	$ (153.7)	$ (164.9)
Balance, January 1, 2018	(160.5)	(172.0)
Other comprehensive income (loss), before reclassifications, net of tax	(6.1)	7.6
Amounts reclassified from accumulated other comprehensive income, net of tax	(0.7)	(14.7)
Other comprehensive income (loss), net of tax	(6.8)	(7.1)
Accumulated other comprehensive income (loss), net of tax ending balance	(160.5)	(172.0)
Other comprehensive income (loss), net of tax	(6.8)	(7.1)
Gains (losses) on securities available for sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax beginning balance	0.0	(15.7)
Balance, January 1, 2018	0.0	(10.0)
Other comprehensive income (loss), before reclassifications, net of tax	0.0	5.3
Amounts reclassified from accumulated other comprehensive income, net of tax	0.0	0.4
Other comprehensive income (loss), net of tax	0.0	5.7
Accumulated other comprehensive income (loss), net of tax ending balance	0.0	(10.0)
Gains (losses) on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax beginning balance	(25.0)	15.1
Balance, January 1, 2018	(10.3)	(20.3)
Other comprehensive income (loss), before reclassifications, net of tax	15.4	(20.3)
Amounts reclassified from accumulated other comprehensive income, net of tax	(0.7)	(15.1)
Other comprehensive income (loss), net of tax	14.7	(35.4)
Accumulated other comprehensive income (loss), net of tax ending balance	(10.3)	(20.3)
Unfunded status of postretirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax beginning balance	(2.6)	(1.1)
Balance, January 1, 2018	(2.7)	(0.6)
Other comprehensive income (loss), before reclassifications, net of tax	(0.1)	0.5
Amounts reclassified from accumulated other comprehensive income, net of tax	0.0	0.0
Other comprehensive income (loss), net of tax	(0.1)	0.5
Accumulated other comprehensive income (loss), net of tax ending balance	(2.7)	(0.6)
Currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax beginning balance	(126.1)	(163.2)
Balance, January 1, 2018	(147.5)	(141.1)
Other comprehensive income (loss), before reclassifications, net of tax	(21.4)	22.1
Amounts reclassified from accumulated other comprehensive income, net of tax	0.0	0.0
Other comprehensive income (loss), net of tax	(21.4)	22.1
Accumulated other comprehensive income (loss), net of tax ending balance	$ (147.5)	$ (141.1)