Condensed Consolidating Financial Statements Condensed Consolidating Comprehensive Income Statements (Details) - USD ($) $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Dec. 28, 2019	Oct. 05, 2019	Jul. 13, 2019	Dec. 29, 2018	Oct. 06, 2018	Jul. 14, 2018	Apr. 20, 2019	Apr. 21, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Condensed Consolidating Comprehensive Income Statement [Line Items]
Net income	$ 95,907	$ 123,669	$ 124,820	$ 53,441	$ 115,843	$ 117,836	$ 142,500	$ 136,727	$ 486,896	$ 423,847	$ 475,505
Other comprehensive income (loss):
Changes in net unrecognized other postretirement benefit costs, net of tax									(142)	(294)	(194)
Currency translation adjustments									9,766	(18,945)	14,941
Equity in other comprehensive (loss) income of subsidiaries									0	0	0
Total other comprehensive income (loss)									9,624	(19,239)	14,747
Comprehensive Income (Loss)									496,520	404,608	490,252
Parent Company [Member]
Condensed Consolidating Comprehensive Income Statement [Line Items]
Net income									486,896	423,847	475,505
Other comprehensive income (loss):
Changes in net unrecognized other postretirement benefit costs, net of tax									0	0	0
Currency translation adjustments									0	0	0
Equity in other comprehensive (loss) income of subsidiaries									9,624	(19,239)	14,747
Total other comprehensive income (loss)									9,624	(19,239)	14,747
Comprehensive Income (Loss)									496,520	404,608	490,252
Guarantor Subsidiaries [Member]
Condensed Consolidating Comprehensive Income Statement [Line Items]
Net income									488,065	425,680	475,089
Other comprehensive income (loss):
Changes in net unrecognized other postretirement benefit costs, net of tax									(142)	(294)	(194)
Currency translation adjustments									0	0	0
Equity in other comprehensive (loss) income of subsidiaries									9,766	(18,945)	14,941
Total other comprehensive income (loss)									9,624	(19,239)	14,747
Comprehensive Income (Loss)									497,689	406,441	489,836
Non-Guarantor Subsidiaries [Member]
Condensed Consolidating Comprehensive Income Statement [Line Items]
Net income									52,241	44,941	57,616
Other comprehensive income (loss):
Changes in net unrecognized other postretirement benefit costs, net of tax									0	0	0
Currency translation adjustments									9,766	(18,945)	14,941
Equity in other comprehensive (loss) income of subsidiaries									0	0	0
Total other comprehensive income (loss)									9,766	(18,945)	14,941
Comprehensive Income (Loss)									62,007	25,996	72,557
Consolidation, Eliminations [Member]
Condensed Consolidating Comprehensive Income Statement [Line Items]
Net income									(540,306)	(470,621)	(532,705)
Other comprehensive income (loss):
Changes in net unrecognized other postretirement benefit costs, net of tax									0	0	0
Currency translation adjustments									0	0	0
Equity in other comprehensive (loss) income of subsidiaries									(19,390)	38,184	(29,688)
Total other comprehensive income (loss)									(19,390)	38,184	(29,688)
Comprehensive Income (Loss)									$ (559,696)	$ (432,437)	$ (562,393)