Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications	$ 21.1	$ (28.0)
Amounts reclassified from AOCI	20.7	(10.3)
Net current period other comprehensive income (loss)	41.8	(38.3)
Gains (losses) on securities available for sale
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	0.2
Other comprehensive income (loss) before reclassifications	(1.8)
Amounts reclassified from AOCI	0.0
Net current period other comprehensive income (loss)	(1.8)
Ending Balance	(1.6)
Gains (losses) on cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(58.9)	51.6
Other comprehensive income (loss) before reclassifications	31.9	(47.5)
Amounts reclassified from AOCI	20.7	(10.3)
Net current period other comprehensive income (loss)	52.6	(57.8)
Ending Balance	(6.3)	(6.2)
Unfunded status of postretirement benefit plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(9.4)	(16.6)
Other comprehensive income (loss) before reclassifications	(0.5)	0.4
Amounts reclassified from AOCI	0.0	0.0
Net current period other comprehensive income (loss)	(0.5)	0.4
Ending Balance	(9.9)	(16.2)
Currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(113.9)	(171.2)
Other comprehensive income (loss) before reclassifications	(8.5)	19.1
Amounts reclassified from AOCI	0.0	0.0
Net current period other comprehensive income (loss)	(8.5)	19.1
Ending Balance	(122.4)	(152.1)
Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(182.0)	(136.2)
Ending Balance	$ (140.2)	$ (174.5)