Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Jun. 28, 2015	Jun. 29, 2014
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ (89.1)		$ (89.1)
Balance at the end of the period			(135.4)
Foreign Currency Translation
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(53.0)	$ 37.9	(53.0)	$ 37.9
Change in period	(65.1)	(4.3)	18.4	(4.3)
Balance at the end of the period	(118.1)	33.6	(99.7)	29.3
Pension Adjustment
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(36.1)	(25.9)	(36.1)	(25.9)
Change in period	0.2	0.2	0.2	0.1
Balance at the end of the period	(35.9)	(25.7)	(35.7)	(25.6)
Accumulated Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(89.1)	12.0	(89.1)	12.0
Change in period	(64.9)	(4.1)	18.6	(4.2)
Balance at the end of the period	$ (154.0)	$ 7.9	$ (135.4)	$ 3.7