Employee Benefit Costs (Schedule of Inputs and Valuation Techniques Used to Measure Fair Value Of Assets) (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Jul. 01, 2018
Assets at Fair Value		$ 773,175	$ 765,631
Short-term Investments [Member]
Assets at Fair Value		11,982	17,061
Fixed Income Securities [Member]
Assets at Fair Value		351,029	394,188
U.S. Common Stocks [Member]
Assets at Fair Value		148,967	183,030
International Mutual Funds [Member]
Assets at Fair Value		149,899	118,674
Venture Capital Funds [Member]
Assets at Fair Value	[1],[2]	20,633	26,078
Debt Funds [Member]
Assets at Fair Value	[3],[4]	1,777	2,778
Real Estate Funds [Member]
Assets at Fair Value	[3],[5]	770	1,166
Private Equity Funds [Member]
Assets at Fair Value	[1],[6]	18,929	22,656
Fair Value Measurements Using Level 1 [Member]
Assets at Fair Value		62,901	318,765
Fair Value Measurements Using Level 1 [Member] | Short-term Investments [Member]
Assets at Fair Value		11,982	17,061
Fair Value Measurements Using Level 1 [Member] | Fixed Income Securities [Member]
Assets at Fair Value		0	0
Fair Value Measurements Using Level 1 [Member] | U.S. Common Stocks [Member]
Assets at Fair Value		50,919	183,030
Fair Value Measurements Using Level 1 [Member] | International Mutual Funds [Member]
Assets at Fair Value		0	118,674
Fair Value Measurements Using Level 1 [Member] | Venture Capital Funds [Member]
Assets at Fair Value	[1],[2]	0	0
Fair Value Measurements Using Level 1 [Member] | Debt Funds [Member]
Assets at Fair Value	[3],[4]	0	0
Fair Value Measurements Using Level 1 [Member] | Real Estate Funds [Member]
Assets at Fair Value	[3],[5]	0	0
Fair Value Measurements Using Level 1 [Member] | Private Equity Funds [Member]
Assets at Fair Value	[1],[6]	0	0
Fair Value Measurements Using Level 2 [Member]
Assets at Fair Value		283,392	394,188
Fair Value Measurements Using Level 2 [Member] | Short-term Investments [Member]
Assets at Fair Value		0	0
Fair Value Measurements Using Level 2 [Member] | Fixed Income Securities [Member]
Assets at Fair Value		283,392	394,188
Fair Value Measurements Using Level 2 [Member] | U.S. Common Stocks [Member]
Assets at Fair Value		0	0
Fair Value Measurements Using Level 2 [Member] | International Mutual Funds [Member]
Assets at Fair Value		0	0
Fair Value Measurements Using Level 2 [Member] | Venture Capital Funds [Member]
Assets at Fair Value	[1],[2]	0	0
Fair Value Measurements Using Level 2 [Member] | Debt Funds [Member]
Assets at Fair Value	[3],[4]	0	0
Fair Value Measurements Using Level 2 [Member] | Real Estate Funds [Member]
Assets at Fair Value	[3],[5]	0	0
Fair Value Measurements Using Level 2 [Member] | Private Equity Funds [Member]
Assets at Fair Value	[1],[6]	0	0
Fair Value Measurements Using Level 3 [Member]
Assets at Fair Value		426,882	52,678
Fair Value Measurements Using Level 3 [Member] | Short-term Investments [Member]
Assets at Fair Value		0	0
Fair Value Measurements Using Level 3 [Member] | Fixed Income Securities [Member]
Assets at Fair Value		67,637	0
Fair Value Measurements Using Level 3 [Member] | U.S. Common Stocks [Member]
Assets at Fair Value		98,048	0
Fair Value Measurements Using Level 3 [Member] | International Mutual Funds [Member]
Assets at Fair Value		149,899	0
Fair Value Measurements Using Level 3 [Member] | Venture Capital Funds [Member]
Assets at Fair Value	[1],[2]	20,633	26,078
Fair Value Measurements Using Level 3 [Member] | Debt Funds [Member]
Assets at Fair Value	[3],[4]	1,777	2,778
Fair Value Measurements Using Level 3 [Member] | Real Estate Funds [Member]
Assets at Fair Value	[3],[5]	770	1,166
Fair Value Measurements Using Level 3 [Member] | Private Equity Funds [Member]
Assets at Fair Value	[1],[6]	$ 18,929	$ 22,656

[1]

[2] This category invests in a combination of public and private securities of companies in financial distress, spin-offs, or new projects focused on technology and manufacturing.

[3]

[4] This fund primarily invests in the debt of various entities including corporations and governments in emerging markets, mezzanine financing, or entities that are undergoing, are considered likely to undergo or have undergone a reorganization.

[5] This category invests primarily in real estate related investments, including real estate properties, securities of real estate companies and other companies with significant real estate assets as well as real estate related debt and equity securities.

[6] Primarily represents investments in all sizes of mostly privately held operating companies in the following core industry sectors: healthcare, energy, financial services, technology-media-telecommunications and industrial and consumer.