Debt - Schedule of information about debt (Details) - USD ($) $ in Millions			9 Months Ended
	Jul. 14, 2026	Jun. 30, 2026	Sep. 30, 2026	Dec. 31, 2025	Oct. 31, 2025
Debt Instrument [Line Items]
Total debt, gross			$ 3,699.7	$ 3,967.9
Less: unamortized deferred financing costs			(15.9)	(21.6)	$ (8.0)
Total debt			3,683.8	3,946.3
Current portion of debt			35.0	30.8
Debt, net of current portion			$ 3,648.8	3,915.5
Revolving credit facility
Debt Instrument [Line Items]
Less: unamortized deferred financing costs					$ (3.8)
Senior secured credit facilities: | Euro term loans B-6 | Euro
Debt Instrument [Line Items]
Interest terms		2.50%	2.50%
Rate			0.00%
Total debt, gross	$ 427.1		$ 0.0	645.2
Senior secured credit facilities: | Euro term loans B-7 | Euro
Debt Instrument [Line Items]
Interest terms	2.00%	2.00%	2.00%
Rate			4.283%
Total debt, gross			$ 423.7	0.0
Senior secured credit facilities: | Euro term loans A-1 | Euro
Debt Instrument [Line Items]
Interest terms		1.50%	1.50%
Rate			3.783%
Total debt, gross			$ 442.7	469.2
Senior secured credit facilities: | Revolving credit facility
Debt Instrument [Line Items]
Capacity			1,400.0
Undrawn letters of credit outstanding			(20.1)
Unused availability			$ 1,379.9
Notes | 3.875% unsecured notes
Debt Instrument [Line Items]
Rate			3.875%
Total debt, gross			$ 800.0	800.0
Notes | 3.875% Euro unsecured notes
Debt Instrument [Line Items]
Rate			3.875%
Total debt, gross			$ 454.0	469.2
Notes | 4.625% unsecured notes
Debt Instrument [Line Items]
Rate			4.625%
Total debt, gross			$ 1,550.0	1,550.0
Finance lease liabilities
Debt Instrument [Line Items]
Total debt, gross			24.6	26.9
Other Debt
Debt Instrument [Line Items]
Total debt, gross			$ 4.7	$ 7.4