Fair Value of Financial Instruments (Financial Instruments Carried at Fair Value) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Jun. 29, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value transfers level 1 to level 2	$ 0
Fair value transfers, level 2 to level 1	0
Assets, Fair Value Disclosure [Abstract]
Short-term investments	908,543	875,642
Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	18,879	40,031
Short-term investments	908,543	875,642
Total assets	927,422	915,673
Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	18,714	40,031
Short-term investments	0	0
Total assets	18,714	40,031
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	165	0
Short-term investments	908,543	875,642
Total assets	908,708	875,642
Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Short-term investments	0	0
Total assets	0	0
Municipal Bonds [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	297,818	294,180
Municipal Bonds [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	297,818	294,180
Municipal Bonds [Member] \| Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Municipal Bonds [Member] \| Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	297,818	294,180
Municipal Bonds [Member] \| Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Corporate Bonds [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	215,326	202,346
Corporate Bonds [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	215,326	202,346
Corporate Bonds [Member] \| Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Corporate Bonds [Member] \| Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	215,326	202,346
Corporate Bonds [Member] \| Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
U.S. Agency Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	19,079	19,135
U.S. Agency Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	19,079	19,135
U.S. Agency Securities [Member] \| Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
U.S. Agency Securities [Member] \| Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	19,079	19,135
U.S. Agency Securities [Member] \| Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Non-U.S. Certificates of Deposit [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	373,303	352,928
Non-U.S. Certificates of Deposit [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	373,303	352,928
Non-U.S. Certificates of Deposit [Member] \| Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Non-U.S. Certificates of Deposit [Member] \| Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	373,303	352,928
Non-U.S. Certificates of Deposit [Member] \| Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Non-U.S. Government Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	3,017	7,053
Non-U.S. Government Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	3,017	7,053
Non-U.S. Government Securities [Member] \| Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Non-U.S. Government Securities [Member] \| Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	3,017	7,053
Non-U.S. Government Securities [Member] \| Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Non-U.S. Certificates of Deposit [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	165	0
Non-U.S. Certificates of Deposit [Member] \| Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Non-U.S. Certificates of Deposit [Member] \| Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	165	0
Non-U.S. Certificates of Deposit [Member] \| Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Money Market Funds [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	18,714	40,031
Money Market Funds [Member] \| Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	18,714	40,031
Money Market Funds [Member] \| Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Money Market Funds [Member] \| Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	$ 0	$ 0