Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 24, 2016	Dec. 26, 2015	Dec. 24, 2016	Dec. 26, 2015
Statements of Income and Comprehensive Income [Abstract]
Net income	$ 130,477	$ 67,469	$ 268,091	$ (4,674)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(4,369)	(359)	(1,757)	(283)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(1,107)	258	(721)	(356)
Unrealized gains (losses) on post-retirement benefits, net of tax benefit (expense)	59	172	4,906	344
Other Comprehensive Income (Loss), Net of Tax	(5,417)	71	2,428	(295)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	125,060	67,540	270,519	(4,969)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	1,633	0	0	0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	439	(22)	317	170
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	$ (28)	$ (81)	$ (2,883)	$ (161)