Earnings Per Share (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012
Numerator:
Net income (loss)	$ (86.0)	$ 106.0	$ 25.3	$ 211.5
Denominator:
Weighted average shares outstanding for basic EPS	98.7	93.9	96.4	93.8
Dilutive effect of share-based awards	0	0.6	0.5	0.6
Weighted average shares outstanding for diluted EPS	98.7	94.5	96.9	94.4
Antidilutive share-based awards excluded from the compuatation of diluted EPS	0.2	0.2	0.1	0.1