Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jan. 25, 2014	Jan. 26, 2013
Cash flows from operating activities:
Net loss	$ (10,564)	$ (43,010)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation and amortization (including amortization of deferred financing fees)	167,302	175,444
Stock-based compensation expense	8,147	16,930
Non-cash impairment charge	2,801	5,932
Deferred taxes	63,199	(2,790)
Loss on disposal of property and equipment	160	1,189
Decrease in other long-term liabilities	(24,938)	(23,018)
Changes in operating assets and liabilities, net	243,509	77,663
Net cash flows provided by operating activities	449,616	208,340
Cash flows from investing activities:
Purchases of property and equipment	(96,178)	(111,095)
Net (increase) decrease in other noncurrent assets	4,395	(7,121)
Other investing activities, net		(4,100)
Net cash flows used in investing activities	(91,783)	(122,316)
Cash flows from financing activities:
Net proceeds from Microsoft Commercial Agreement financing arrangement	63,547	27,495
Net decrease in credit facility	(77,000)	(324,200)
Proceeds from exercise of common stock options	158	2,290
Purchase of treasury stock	(3,786)	(1,220)
Cash dividends paid to shareholders	(11,826)	(11,826)
Excess tax benefit from stock-based compensation	187	326
Net proceeds from issuance of Preferred Membership interests		380,623
Net cash flows provided by (used in) financing activities	(28,720)	73,488
Net increase in cash and cash equivalents	329,113	159,512
Cash and cash equivalents at beginning of period	160,470	54,131
Cash and cash equivalents at end of period	489,583	213,643
Changes in operating assets and liabilities, net:
Receivables, net	(147,390)	(226,222)
Merchandise inventories	(31,120)	(223,108)
Prepaid expenses and other current assets	20,502	35,448
Accounts payable and accrued liabilities	401,517	491,545
Changes in operating assets and liabilities, net	243,509	77,663
Supplemental cash flow information:
Interest	18,771	23,166
Income taxes (net of refunds)	1,708	2,859
Non-cash financing activity:
Accrued dividend on redeemable preferred stock	$ 3,942	$ 3,942