Condensed Consolidating Balance Sheet (Details) - USD ($) $ in Thousands	Apr. 20, 2019	Dec. 30, 2018	Dec. 29, 2018	Apr. 21, 2018	Dec. 30, 2017
Current assets:
Cash and cash equivalents	$ 537,330		$ 896,527	$ 639,143	$ 546,937
Receivables, net	684,419		624,972
Inventories	4,433,981		4,362,547
Other current assets	126,108		198,408
Total current assets	5,781,838		6,082,454
Property and equipment, net of accumulated depreciation	1,363,128		1,368,985
Operating Lease, Right-of-Use Asset	2,371,362	$ 2,400,000	0
Goodwill	991,240		990,237
Intangible assets, net	527,702		550,593
Other assets, net	46,241		48,379
Investment in subsidiaries	0		0
Intercompany note receivable	0		0
Due from intercompany, net	0		0
Assets, Total	11,081,511		9,040,648
Current liabilities:
Accounts payable	3,276,955		3,172,790
Accrued expenses	530,277		623,141
Other current liabilities	491,645		90,019
Total current liabilities	4,298,877		3,885,950
Long-term debt	746,767		1,045,720
Noncurrent operating lease liabilities	2,054,173		0
Deferred income taxes	310,404		318,353
Other long-term liabilities	124,067		239,812
Intercompany note payable	0		0
Due to intercompany, net	0		0
Commitments and contingencies
Stockholders' equity	3,547,223		3,550,813	3,546,621	3,415,196
Liabilities and Stockholders' Equity, Total	11,081,511		9,040,648
Parent Company [Member]
Current assets:
Cash and cash equivalents	4		0	23	23
Receivables, net	0		0
Inventories	0		0
Other current assets	1,421		3,103
Total current assets	1,425		3,103
Property and equipment, net of accumulated depreciation	72		77
Operating Lease, Right-of-Use Asset	0
Goodwill	0		0
Intangible assets, net	0		0
Other assets, net	2,294		2,408
Investment in subsidiaries	4,077,071		3,945,862
Intercompany note receivable	749,248		1,048,993
Due from intercompany, net	0		0
Assets, Total	4,830,110		5,000,443
Current liabilities:
Accounts payable	0		0
Accrued expenses	2,085		3,444
Other current liabilities	0		0
Total current liabilities	2,085		3,444
Long-term debt	746,767		1,045,720
Noncurrent operating lease liabilities	0
Deferred income taxes	0		0
Other long-term liabilities	0		0
Intercompany note payable	0		0
Due to intercompany, net	534,035		400,466
Commitments and contingencies
Stockholders' equity	3,547,223		3,550,813
Liabilities and Stockholders' Equity, Total	4,830,110		5,000,443
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	485,512		785,605	566,915	482,620
Receivables, net	644,983		590,269
Inventories	4,245,643		4,182,973
Other current assets	120,529		191,318
Total current assets	5,496,667		5,750,165
Property and equipment, net of accumulated depreciation	1,354,398		1,359,980
Operating Lease, Right-of-Use Asset	2,328,974
Goodwill	943,502		943,364
Intangible assets, net	487,802		510,586
Other assets, net	45,664		47,815
Investment in subsidiaries	495,756		474,772
Intercompany note receivable	0		0
Due from intercompany, net	179,333		102,886
Assets, Total	11,332,096		9,189,568
Current liabilities:
Accounts payable	3,076,126		2,954,632
Accrued expenses	503,766		603,460
Other current liabilities	483,144		91,994
Total current liabilities	4,063,036		3,650,086
Long-term debt	0		0
Noncurrent operating lease liabilities	2,021,182
Deferred income taxes	297,743		306,127
Other long-term liabilities	123,816		238,500
Intercompany note payable	749,248		1,048,993
Due to intercompany, net	0		0
Commitments and contingencies
Stockholders' equity	4,077,071		3,945,862
Liabilities and Stockholders' Equity, Total	11,332,096		9,189,568
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents	51,818		110,922	72,228	64,317
Receivables, net	39,436		34,703
Inventories	188,338		179,574
Other current assets	4,158		3,987
Total current assets	283,750		329,186
Property and equipment, net of accumulated depreciation	8,658		8,928
Operating Lease, Right-of-Use Asset	42,388
Goodwill	47,738		46,873
Intangible assets, net	39,900		40,007
Other assets, net	577		564
Investment in subsidiaries	0		0
Intercompany note receivable	0		0
Due from intercompany, net	354,702		297,580
Assets, Total	777,713		723,138
Current liabilities:
Accounts payable	200,829		218,158
Accrued expenses	24,426		16,237
Other current liabilities	8,505		(1,975)
Total current liabilities	233,760		232,420
Long-term debt	0		0
Noncurrent operating lease liabilities	32,991
Deferred income taxes	14,955		14,634
Other long-term liabilities	251		1,312
Intercompany note payable	0		0
Due to intercompany, net	0		0
Commitments and contingencies
Stockholders' equity	495,756		474,772
Liabilities and Stockholders' Equity, Total	777,713		723,138
Consolidation, Eliminations [Member]
Current assets:
Cash and cash equivalents	(4)		0	$ (23)	$ (23)
Receivables, net	0		0
Inventories	0		0
Other current assets	0		0
Total current assets	(4)		0
Property and equipment, net of accumulated depreciation	0		0
Operating Lease, Right-of-Use Asset	0
Goodwill	0		0
Intangible assets, net	0		0
Other assets, net	(2,294)		(2,408)
Investment in subsidiaries	(4,572,827)		(4,420,634)
Intercompany note receivable	(749,248)		(1,048,993)
Due from intercompany, net	(534,035)		(400,466)
Assets, Total	(5,858,408)		(5,872,501)
Current liabilities:
Accounts payable	0		0
Accrued expenses	0		0
Other current liabilities	(4)		0
Total current liabilities	(4)		0
Long-term debt	0		0
Noncurrent operating lease liabilities	0
Deferred income taxes	(2,294)		(2,408)
Other long-term liabilities	0		0
Intercompany note payable	(749,248)		(1,048,993)
Due to intercompany, net	(534,035)		(400,466)
Commitments and contingencies
Stockholders' equity	(4,572,827)		(4,420,634)
Liabilities and Stockholders' Equity, Total	$ (5,858,408)		$ (5,872,501)