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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Millions
 6 Months Ended
Oct. 30, 2015
Oct. 24, 2014
Cash flows from operating activities:    
Net income $ 84 $ 248
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 136 155
Stock-based compensation 136 130
Deferred income taxes (79) (2)
Excess tax benefit from stock-based compensation (4) (49)
Other non-cash items, net 31 52
Changes in assets and liabilities:    
Accounts receivable 189 222
Inventories 21 15
Other operating assets 59 23
Accounts payable (60) (32)
Accrued expenses (88) (136)
Deferred revenue and financed unearned services revenue (137) (45)
Other operating liabilities (14) 16
Net cash provided by operating activities 274 597
Cash flows from investing activities:    
Purchases of investments (886) (603)
Maturities, sales and collections of investments 1,674 964
Purchases of property and equipment (84) (109)
Other investing activities, net 0 (1)
Net cash provided by investing activities 704 251
Cash flows from financing activities:    
Issuance of common stock under employee stock award plans 25 71
Repurchase of common stock (613) (719)
Excess tax benefit from stock-based compensation 4 49
Issuance of long-term debt, net 0 495
Dividends paid (107) (105)
Other financing activities, net (3) (4)
Net cash used in financing activities (694) (213)
Effect of exchange rate changes on cash and cash equivalents (8) (21)
Net increase in cash and cash equivalents 276 614
Cash and cash equivalents:    
Beginning of period 1,922 2,291
End of period $ 2,198 $ 2,905