Commitments and Contingencies (Schedule Of Payments Due By Period) (Details) $ in Thousands	6 Months Ended
	Sep. 25, 2021 USD ($)
Commitments and Contingencies [Abstract]
Principal payments on long-term debt, Total	$ 170,000
Principal payments on long-term debt, 2 to 3 years	170,000
Finance lease commitments/financing obligations, Total	513,723	[1]
Finance lease commitments/financing obligations, Remainder of Year	57,673	[1]
Finance lease commitments/financing obligations, 2 to 3 Years	112,755	[1]
Finance lease commitments/financing obligations, 4 to 5 Years	101,480	[1]
Finance lease commitments/financing obligations, After 5 Years	241,815	[1]
Operating lease commitments, Total	260,773	[1]
Operating lease commitments, Within 1 year	39,565	[1]
Operating lease commitments, 2 to 3 years	71,506	[1]
Operating lease commitments, 4 to 5 years	57,389	[1]
Operating lease commitments, After 5 years	92,313	[1]
Accrued rent, Total	1,005
Accrued rent, Within 1 year	883
Accrued rent, 2 to 3 Years	56
Accrued rent, 4 to 5 Years	26
Accrued rent, After 5 Years	40
Other liabilities, Total	733
Other liabilities, Within 1 year	733
Other liabilities, 4 to 5 years
Other liabilities, After 5 years
Contractual commitments, Total	946,234
Contractual commitments, Within 1 year	98,854
Contractual commitments, 2 to 3 years	354,317
Contractual commitments, 4 to 5 years	158,895
Contractual commitments, After 5 years	334,168
Finance lease payments, related to options to extend, reasonable certain of being exercised	104,300
Operating lease payments, related to options to extend, reasonably certain of being exercised	$ 66,500

[1] Finance and operating lease commitments represent future undiscounted lease payments and include $104.3 million and $66.5 million, respectively, related to options to extend lease terms that are reasonably certain of being exercised.