Fair Value Measurements, Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015		Jun. 28, 2014	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Costs associated with entering into interest rate swap arrangements included in ineffective portion of loss recognized			$ 7.5
Cash Flow Hedge Arrangements
Notional Amount Of Derivatives	$ 6,620.0		6,620.0			$ 3,740.0
Change in fair value of cash flow hedges, net of tax	31.0	$ 0.0	23.0		$ 0.0
Net Investment Hedge
Gain (Loss) in Currency Translation Adjustment on Net Investment Hedge			$ 59.4
Derivatives Designated as Cash Flow Hedges [Member]
Cash Flow Hedge Arrangements
Debt Instrument, Term			10 years
Notional Amount Of Derivatives	1,000.0		$ 1,000.0
Change in fair value of cash flow hedges, net of tax			23.0
Interest Rate Swaps [Member] | Other Expense [Member] | Derivatives Designated as Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized	9.5	1.0	16.2		2.1
Ineffective Portion of Gain (Loss) Recognized	(0.2)	1.1	(7.2)	[1]	1.8
Interest Rate Swaps [Member] | Derivatives Designated as Hedging Instruments | Other Current Assets [Member]
Fair Value - Assets
Derivative Asset, Fair Value	37.1		37.1
Interest Rate Swaps [Member] | Derivatives Designated as Hedging Instruments | Other Long-term Liabilities [Member]
Fair Value - Liabilities
Derivative Liability, Fair Value	40.7		40.7			3.7
Foreign Currency Exchange Contracts [Member] | Cost of Revenues [Member] | Derivatives Not Designated as Fair Value Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized	4.1	3.4	17.5		4.2
Foreign Currency Exchange Contracts [Member] | Other Expense [Member] | Derivatives Not Designated as Fair Value Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized	17.1	$ (0.5)	137.0		$ 0.2
Foreign Currency Exchange Contracts [Member] | Derivatives Not Designated as Fair Value Hedges | Other Current Assets [Member]
Fair Value - Assets
Derivative Asset, Fair Value	13.2		13.2			20.2
Foreign Currency Exchange Contracts [Member] | Derivatives Not Designated as Fair Value Hedges | Accrued Expense [Member]
Fair Value - Liabilities
Derivative Liability, Fair Value	$ 7.8		$ 7.8			$ 6.7

[1] The ineffective portion of the loss recognized on interest rate swaps during the six months ended June 27, 2015 includes $7.5 million of costs associated with entering into the swap arrangements.