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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	$ 2,793.4
Balance at the end of the period	3,302.5	$ 2,793.4
Foreign Currency Translation
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(186.1)	(208.3)	$ (134.0)
Other comprehensive income before reclassifications	50.6	22.2	(74.3)
Net current period other comprehensive income	50.6	22.2	(74.3)
Balance at the end of the period	(135.5)	(186.1)	(208.3)
Interest Rate Swaps
Changes in accumulated other comprehensive income (loss) by component
Other comprehensive income before reclassifications	(3.6)
Amounts reclassified from accumulated other comprehensive income - net of tax provision	0.4
Net current period other comprehensive income	(3.2)
Balance at the end of the period	(3.2)
Other
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(16.7)	(26.2)	(12.5)
Other comprehensive income before reclassifications	(5.2)	9.5	(13.7)
Net current period other comprehensive income	(5.2)	9.5	(13.7)
Balance at the end of the period	(21.9)	(16.7)	(26.2)
Accumulated Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(202.8)	(234.5)	(146.5)
Other comprehensive income before reclassifications	41.8	31.7	(88.0)
Amounts reclassified from accumulated other comprehensive income - net of tax provision	0.4
Net current period other comprehensive income	42.2	31.7	(88.0)
Balance at the end of the period	(160.6)	(202.8)	(234.5)
Amounts reclassified from accumulated other comprehensive income, tax provision	$ 0.0	$ 0.0	$ 0.0

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Amount of tax provision of reclassification adjustments of other comprehensive income (loss).

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