Commitments and Contingencies (Schedule Of Payments Due By Period) (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 27, 2021	Mar. 28, 2020
Commitments and Contingencies [Abstract]
Principal payments on long-term debt, Total		$ 190,000	$ 566,400
Principal payments on long-term debt, 4 to 5 years		190,000
Finance lease commitments/financing obligations, Total	[1],[2]	516,579
Finance lease commitments/financing obligations, Within 1 Year	[1],[2]	55,389
Finance lease commitments/financing obligations, 2 to 3 Years	[1]	109,892
Finance lease commitments/financing obligations, 4 to 5 Years	[1]	100,486
Finance lease commitments/financing obligations, After 5 Years	[1],[2]	250,812
Operating lease commitments, Total	[1]	239,546
Operating lease commitments, Within 1 year	[1]	36,451
Operating lease commitments, 2 to 3 years	[1]	66,066
Operating lease commitments, 4 to 5 years	[1]	53,575
Operating lease commitments, After 5 years	[1]	83,454
Accrued rent, Total		1,807
Accrued rent, Within 1 year		1,563
Accrued rent, 2 to 3 Years		132
Accrued rent, 4 to 5 Years		42
Accrued rent, After 5 Years		70
Other liabilities, Total		1,133
Other liabilities, Within 1 year		800
Other liabilities, 2 to 3 years		333
Contractual commitments, Total		949,065
Contractual commitments, Within 1 year		94,203
Contractual commitments, 2 to 3 years		176,423
Contractual commitments, 4 to 5 years		344,103
Contractual commitments, After 5 years		334,336
Operating lease payments, related to options to extend, reasonably certain of being exercised		61,000
Finance lease payments, related to options to extend, reasonable certain of being exercised		$ 108,400

[1] Finance and operating lease commitments represent future undiscounted lease payments and include $108.4 million and $61.0 million, respectively, related to options to extend lease terms that are reasonably certain of being exercised.

[2] Finance lease payments include $108.4 million related to options to extend finance leases that are reasonably certain of being exercised.