CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Dec. 30, 2017	Oct. 07, 2017	Jul. 15, 2017	Dec. 31, 2016	Oct. 08, 2016	Jul. 16, 2016	Apr. 22, 2017	Apr. 23, 2016	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Net income	$ 184,500	$ 95,996	$ 87,049	$ 62,365	$ 113,844	$ 124,600	$ 107,960	$ 158,813	$ 475,505	$ 459,622	$ 473,398
Other comprehensive income (loss):
Changes in net unrecognized other postretirement benefit costs, net of tax of $126, $346 and $289									(194)	(534)	(445)
Currency translation adjustments									14,941	4,892	(31,277)
Total other comprehensive income (loss)									14,747	4,358	(31,722)
Comprehensive income									$ 490,252	$ 463,980	$ 441,676