Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Mar. 31, 2012	Apr. 02, 2011	Mar. 31, 2012 1% senior convertible notes	Jun. 05, 2006 1% senior convertible notes	Mar. 31, 2012 Stock options and ESPP	Apr. 02, 2011 Stock options and ESPP	Mar. 31, 2012 Stock options and ESPP	Apr. 02, 2011 Stock options and ESPP	Mar. 31, 2012 Restricted shares and stock units	Mar. 31, 2012 Restricted shares and stock units
Numerator:
Net (loss) income	$ (17.4)	$ 38.6	$ (33.4)	$ 62.3
Denominator:
Weighted-average number of common shares outstanding-Basic	230.6	225.6	229.5	223.4
Effect of dilutive securities from stock-based benefit plans (in shares)		9.8		7.7
Weighted-average number of common shares outstanding-Diluted	230.6	235.4	229.5	231.1
Net (loss) income per share:
Basic (in dollars per share)	$ (0.08)	$ 0.17	$ (0.15)	$ 0.28
Diluted (in dollars per share)	$ (0.08)	$ 0.16	$ (0.15)	$ 0.27
Anti-dilutive securities excluded from computation of earnings per share
Total potentially dilutive securities (in shares)	17.4	1.5	18.1	4.5			9.7	1.5	10.3	4.5	7.7	7.8
Convertible notes
Interest rate on Senior convertible notes (as a percent)					1.00%	1.00%
Conversion price of debt (in dollars per share)					$ 30.30