Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Finite and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Amortization of Intangible Assets	$ 7.6	$ 10.2	$ 11.8
Finite-lived intangible assets, accumulated amortization	23.3	19.1
Total intangible assets, gross	90.6	101.8	$ 116.8
Total intangible assets, net	67.3	82.7
Trademarks and tradenames [Member]
Finite and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, gross carrying value	70.0	81.7
Finite-lived intangible assets, accumulated amortization	23.3	19.1
Finite-lived intangible assets, net	46.7	62.6
Trademarks and tradenames [Member]
Finite and Indefinite-Lived Intangible Assets by Major Class [Line Items]
Amortization of Intangible Assets	0.0	0.0
Indefinite-lived tradenames	$ 20.6	$ 20.1