Schedule - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 60.2	$ 51.6	$ 34.1
Additions Charged (Credited) to Expense	10.7	13.6	22.3
Deductions / Other Additions to Reserve	(3.6)	(5.1)	(4.5)
Effects of Foreign Currency	(1.6)	0.1	(0.3)
Balance at End of Period	65.7	60.2	51.6
Deferred Tax Asset Valuation Allowances [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	140.6	88.3	72.7
Additions Charged (Credited) to Expense	48.2	41.3	24.8
Deductions / Other Additions to Reserve	206.2	(10.3)	(12.4)
Effects of Foreign Currency	(4.1)	2.8	(1.1)
Acquired Allowances		18.5	4.3
Balance at End of Period	$ 390.9	$ 140.6	$ 88.3