Financial Instruments - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 08, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets:
Cash equivalents		$ 1.7	$ 212.3
Liabilities:
Realized gains on foreign exchange contracts		11.4	17.4	$ 18.2
Foreign exchange forwards
Assets:
Derivative asset		1.9	2.0
Liabilities:
Derivative liability		0.7	0.9
Swap arrangements
Assets:
Derivative asset		10.1
Liabilities:
Derivative liability			1.0
Foreign exchange collar
Assets:
Derivative asset			23.5
Liabilities:
Realized gains on foreign exchange contracts	$ 21.0
Quoted prices in active markets for identical assets (Level I)
Assets:
Cash equivalents		1.7	212.3
Quoted prices in active markets for identical assets (Level I) | Foreign exchange forwards
Assets:
Derivative asset		0.0	0.0
Liabilities:
Derivative liability		0.0	0.0
Quoted prices in active markets for identical assets (Level I) | Swap arrangements
Assets:
Derivative asset		0.0
Liabilities:
Derivative liability			0.0
Quoted prices in active markets for identical assets (Level I) | Foreign exchange collar
Assets:
Derivative asset			0.0
Significant other observable inputs (Level II)
Assets:
Cash equivalents		0.0	0.0
Significant other observable inputs (Level II) | Foreign exchange forwards
Assets:
Derivative asset		1.9	2.0
Liabilities:
Derivative liability		0.7	0.9
Significant other observable inputs (Level II) | Swap arrangements
Assets:
Derivative asset		10.1
Liabilities:
Derivative liability			1.0
Significant other observable inputs (Level II) | Foreign exchange collar
Assets:
Derivative asset			23.5
Significant unobservable inputs (Level III)
Assets:
Cash equivalents		0.0	0.0
Significant unobservable inputs (Level III) | Foreign exchange forwards
Assets:
Derivative asset		0.0	0.0
Liabilities:
Derivative liability		0.0	0.0
Significant unobservable inputs (Level III) | Swap arrangements
Assets:
Derivative asset		$ 0.0
Liabilities:
Derivative liability			0.0
Significant unobservable inputs (Level III) | Foreign exchange collar
Assets:
Derivative asset			$ 0.0