Income Taxes - Other Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Income Tax Disclosure [Abstract]
Income tax benefits related to exercise or vesting of equity awards	$ 3.1	$ 3.4	$ 2.4
Deferred Tax Assets, Other Comprehensive Loss	369	283
Total amount of unrecognized tax benefit	10.7	30.0
Total amount of accrued interest and penalties	4.0	18.0
Net benefit of accrued interest and penalties	8.6	1.7	0.3
Total amount of unrecognized tax benefit which may be recognized in the next twelve months that would impact the effective tax rate	$ 6.1