Accumulated Other Comprehensive Loss - Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	$ 2,934.8	$ 4,173.9	$ 4,206.9
Other comprehensive income before reclassifications:
Increase (decrease)	240.3	(145.7)	6.1
Income tax impact	16.4	(7.7)	4.5
Other comprehensive income (loss) before reclassifications, net of income taxes	256.7	(153.4)	10.6
Amounts reclassified from accumulated other comprehensive loss:
Decrease	1.4	(0.7)	(3.3)
Income tax impact	(0.2)	0.2	0.6
Amounts reclassified from accumulated other comprehensive loss, net of income taxes	1.2	(0.5)	(2.7)
Net current period other comprehensive income (loss), net of income taxes	257.9	(153.9)	7.9
Balance, end of period	3,106.3	2,934.8	4,173.9
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(371.1)	(217.2)	(225.1)
Amounts reclassified from accumulated other comprehensive loss:
Net current period other comprehensive income (loss), net of income taxes	257.9	(153.9)	7.9
Balance, end of period	(113.2)	(371.1)	(217.2)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(375.1)	(223.7)	(240.5)
Other comprehensive income before reclassifications:
Increase (decrease)	239.9	(143.1)	13.8
Income tax impact	16.5	(8.3)	3.0
Other comprehensive income (loss) before reclassifications, net of income taxes	256.4	(151.4)	16.8
Amounts reclassified from accumulated other comprehensive loss:
Decrease	0.0	0.0	0.0
Income tax impact	0.0	0.0	0.0
Amounts reclassified from accumulated other comprehensive loss, net of income taxes	0.0	0.0	0.0
Net current period other comprehensive income (loss), net of income taxes	256.4	(151.4)	16.8
Balance, end of period	(118.7)	(375.1)	(223.7)
Unrealized Pension Costs
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	4.0	6.5	15.4
Other comprehensive income before reclassifications:
Increase (decrease)	0.4	(2.6)	(7.7)
Income tax impact	(0.1)	0.6	1.5
Other comprehensive income (loss) before reclassifications, net of income taxes	0.3	(2.0)	(6.2)
Amounts reclassified from accumulated other comprehensive loss:
Decrease	1.4	(0.7)	(3.3)
Income tax impact	(0.2)	0.2	0.6
Amounts reclassified from accumulated other comprehensive loss, net of income taxes	1.2	(0.5)	(2.7)
Net current period other comprehensive income (loss), net of income taxes	1.5	(2.5)	(8.9)
Balance, end of period	$ 5.5	$ 4.0	$ 6.5