Long-Term Obligations and Other Short-Term Borrowings - Long-Term Obligations, Presented Net of Issue Discounts and Fees Paid to Lenders, and Other Short-Term Borrowings (Detail) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2020 EUR (€)	Feb. 28, 2020 USD ($)	Jun. 30, 2019 USD ($)
Schedule Of Debt [Line Items]
Total long-term debt	$ 3,198.7			$ 2,959.3
Debt, Current	271.8			76.5
Long-term obligations, less current portion	2,926.9			2,882.8
Term loan facility U.S. dollar-denominated
Schedule Of Debt [Line Items]
Total long-term debt	930.5			936.2
Term loan facility euro-denominated
Schedule Of Debt [Line Items]
Total long-term debt	0.0			346.8
Revolving Credit Facility - Two
Schedule Of Debt [Line Items]
Total long-term debt	$ 200.0		$ 100.0	0.0
Debt Instrument, Interest Rate, Stated Percentage	2.93%	2.93%
Interest Costs Incurred	$ 0.4
Four Point Seven Five Percent Senior Euro Denominated Notes [Member]
Schedule Of Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.75%	4.75%
2.375% Senior Euro Denominated Notes [Member]
Schedule Of Debt [Line Items]
Total long-term debt | €		€ 825.0
Debt Instrument, Interest Rate, Stated Percentage	2.375%	2.375%
Deferred purchase consideration
Schedule Of Debt [Line Items]
Total long-term debt	$ 96.7			143.9
Capital lease obligations
Schedule Of Debt [Line Items]
Total long-term debt	137.1			167.3
Other obligations
Schedule Of Debt [Line Items]
Total long-term debt	2.3			0.1
Carrying Value [Member]
Schedule Of Debt [Line Items]
Debt Instrument, Fair Value Disclosure	3,198.7			2,959.3
Fair Value, Inputs, Level 2 [Member] | Carrying Value [Member] | Four Point Seven Five Percent Senior Euro Denominated Notes [Member]
Schedule Of Debt [Line Items]
Debt Instrument, Fair Value Disclosure	0.0			428.3
Fair Value, Inputs, Level 2 [Member] | Carrying Value [Member] | U.S. dollar-denominated 4.875% Senior Notes due 2026
Schedule Of Debt [Line Items]
Debt Instrument, Fair Value Disclosure	445.2			444.6
Fair Value, Inputs, Level 2 [Member] | Carrying Value [Member] | U.S Dollar-denominated 5.00% Senior Notes [Member]
Schedule Of Debt [Line Items]
Debt Instrument, Fair Value Disclosure	492.8			492.1
Fair Value, Inputs, Level 2 [Member] | Carrying Value [Member] | 2.375% Senior Euro Denominated Notes [Member]
Schedule Of Debt [Line Items]
Debt Instrument, Fair Value Disclosure	$ 894.1			$ 0.0