Schedule - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 65.7	$ 60.2	$ 51.6
Additions Charged (Credited) to Expense	5.5	10.7	13.6
Deductions / Other Additions to Reserve	(5.3)	(3.6)	(5.1)
Effects of Foreign Currency	(0.9)	(1.6)	0.1
Balance at End of Period	65.0	65.7	60.2
Deferred Tax Asset Valuation Allowances [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	390.9	140.6	88.3
Additions Charged (Credited) to Expense	(6.6)	48.2	41.3
Deductions / Other Additions to Reserve	165.7	206.2	(10.3)
Effects of Foreign Currency	(3.9)	(4.1)	2.8
Acquired Allowances			18.5
Balance at End of Period	$ 546.1	$ 390.9	$ 140.6