Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
	Aug. 17, 2015	Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014	Aug. 21, 2013
Numerator:
Income (loss) from continuing operations, net of taxes		$ 3.3	$ (37.7)	$ (10.3)	$ (63.5)
Income (loss) from discontinued operations, net of taxes		3.0	12.6	(50.4)	28.7
Net income (loss)		$ 6.3	$ (25.1)	$ (60.7)	$ (34.8)
Denominator:
Weighted-average number of common shares outstanding - basic (in shares)		234.9	232.1	235.5	231.5
Effect of dilutive securities from stock-based benefit plans - Diluted (in shares)		2.2	0.0	0.0	0.0
Shares used in per share calculation - diluted (in shares)		237.1	232.1	235.5	231.5
Net income (loss) per share from - basic and diluted:
Continuing operations (in dollars per share)		$ 0.02	$ (0.16)	$ (0.04)	$ (0.27)
Discontinued operations (in dollars per share)		0.01	0.05	(0.22)	0.12
Net income (loss) per share (in dollars per share)		$ 0.03	$ (0.11)	$ (0.26)	$ (0.15)
Anti-dilutive securities excluded from computation of earnings per share
Total potentially dilutive securities (in shares)		5.4	14.9	14.4	14.6
2033 Notes
Convertible notes
Interest rate on senior convertible notes (as a percent)		0.625%	0.625%	0.625%	0.625%	0.625%
Conversion price of debt (in dollars per share)	$ 11.28	$ 11.28	$ 11.28	$ 11.28	$ 11.28
Stock options and ESPP
Anti-dilutive securities excluded from computation of earnings per share
Total potentially dilutive securities (in shares)		0.9	3.8	3.4	3.8
Restricted Stock Units
Anti-dilutive securities excluded from computation of earnings per share
Total potentially dilutive securities (in shares)		4.5	11.1	11.0	10.8