Indebtedness Debt Extinguishment (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended		12 Months Ended
	Dec. 27, 2014	Dec. 31, 2015	Dec. 27, 2014	Dec. 31, 2016	Jun. 27, 2015	Jun. 28, 2014
Gains (Losses) on Extinguishment of Debt [Abstract]
Make-whole payments						$ 133.5
Write-off of financing fees on Bridge Credit Agreements						19.0
Write-off of deferred financing fees						10.5
Write-off of unamortized discount						2.8
Total loss on extinguishment of debt	$ 9.6	$ 0.9	$ 9.6	$ 1.1	$ 10.5	$ 165.8