Derivative Financial Instruments (Fair Values of Derivative Instruments) (Details) - USD ($) $ in Millions		Sep. 25, 2015		Dec. 26, 2014
Derivatives, Fair Value [Line Items]
Foreign currency cash flow hedge gain (loss) to be reclassified during next 12 months		$ 15.5
Net fair value of hedges recognized as a gain (loss) in accumulated other comprehensive income (AOCI) that will be transferred to earnings after 12 months		2.2
Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts	[1]	15.5	[2]	$ 22.7
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts	[1]	2.2	[2]	3.1
Total Asset Derivatives [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts	[1]	17.7	[2]	25.8
Accounts Payable and Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts	[1]	0.0	[2]	0.2
Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts	[1]	0.0	[2]	0.0
Total Liability Derivatives [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts	[1]	$ 0.0	[2]	$ 0.2

[1] See Note 15, "Fair Value Measurements", for fair value disclosures.

[2] We expect that $15.5 million and $2.2 million of the net fair value of hedges recognized as a gain in accumulated other comprehensive income ("AOCI") will be transferred to earnings during the next 12 months and last three months of 2016, respectively, along with the earnings effect of the related forecasted transactions.