Derivative Financial Instruments - Schedule of Fair Value of Derivative Contracts Recorded on Gross Basis in Consolidated Balance Sheets (Details) - Forward foreign currency exchange contracts $ in Millions	Sep. 30, 2017 USD ($)	Jul. 25, 2017 GBP (£)	Apr. 01, 2017 USD ($)
Derivatives, Fair Value [Line Items]
Notional Amounts	$ 1,645.2		$ 167.5
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amounts	176.6		167.5
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amounts	1,468.6	£ 1,115,000,000.000	0.0
Forward foreign currency exchange contracts - assets	36.7
Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Forward foreign currency exchange contracts - assets	36.8		4.7
Prepaid Expenses and Other Current Assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Forward foreign currency exchange contracts - assets	0.1		4.7
Prepaid Expenses and Other Current Assets | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Forward foreign currency exchange contracts - assets			0.0
Accrued Expenses and Other Current Liabilities
Derivatives, Fair Value [Line Items]
Forward foreign currency exchange contracts - liabilities	11.3		0.4
Accrued Expenses and Other Current Liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Forward foreign currency exchange contracts - liabilities	11.3		0.4
Accrued Expenses and Other Current Liabilities | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Forward foreign currency exchange contracts - liabilities	$ 0.0		$ 0.0