Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	$ 3,302.5
Balance at the end of the period	3,462.2
Foreign Currency Translation
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(135.5)	$ (186.1)
Other comprehensive income (loss) before reclassifications	0.6	(92.7)
Net current period other comprehensive income (loss)	0.6	(92.7)
Balance at the end of the period	(134.9)	(278.8)
Interest Rate Swaps
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(3.2)
Other comprehensive income (loss) before reclassifications	3.7
Amounts reclassified from accumulated other comprehensive income (loss) - net of tax provision	0.2
Net current period other comprehensive income (loss)	3.9
Balance at the end of the period	0.7
Other
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(21.9)	(16.7)
Other comprehensive income (loss) before reclassifications	0.7	(4.0)
Net current period other comprehensive income (loss)	0.7	(4.0)
Balance at the end of the period	(21.2)	(20.7)
Accumulated Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(160.6)	(202.8)
Other comprehensive income (loss) before reclassifications	5.0	(96.7)
Amounts reclassified from accumulated other comprehensive income (loss) - net of tax provision	0.2
Net current period other comprehensive income (loss)	5.2	(96.7)
Balance at the end of the period	(155.4)	(299.5)
Amounts reclassified from accumulated other comprehensive income, tax provision	$ 0.1	$ 0.0