Financial Instruments - Fair Values of Derivative Instruments Included within Condensed Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Apr. 01, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	$ 32.5	$ 46.4
Liability Derivatives Fair Value	2.5	13.5
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	8.6	24.1
Designated as Hedging Instrument [Member] | Other Assets [Member] | Treasury Locks [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value		14.3
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	8.6	9.8
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	23.9	22.3
Liability Derivatives Fair Value	2.5	13.5
Not Designated as Hedging Instrument [Member] | Foreign Currency Forwards [Member] | Prepaid Expenses and Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	4.9	4.4
Not Designated as Hedging Instrument [Member] | Foreign Currency Forwards [Member] | Other Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	2.5	13.5
Not Designated as Hedging Instrument [Member] | Equity Forwards [Member] | Prepaid Expenses and Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	$ 19.0	$ 17.9