Equity-Based Compensation Plans (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 25, 2011	Dec. 26, 2010	Dec. 25, 2011	Dec. 26, 2010
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Options and restricted stock units issued and outstanding under stock plan			2,787,348
Shares available for future issuance under stock incentive plan	7,910,788		7,910,788
Total intrinsic value of options exercised	$ 0.9	$ 4.0	$ 1.1	$ 4.8
Restricted Stock Units [Member]
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Unrecognized compensation expense related to unvested stock	60.3		60.3
Weighted average remaining vesting period, years			1.3
Employee Stock Purchase Plan [Member]
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
ESPP purchase price as percentage of market value			85.00%
Length of ESPP offering period, months			12
Number of shares available for purchase under employees stock purchase plan			9,389,557
Unrecognized compensation expense related to unvested stock	6.3		6.3
Weighted average remaining vesting period, years			0.7
Weighted-average assumptions, expected dividends	$ 0		$ 0
Maximum [Member]
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Options and restricted stock units vesting period (in years)			2