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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Millions
 3 Months Ended
Jul. 29, 2016
Jul. 31, 2015
Cash flows from operating activities:    
Net income (loss) $ 64 $ (30)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 60 69
Stock-based compensation 52 77
Deferred income taxes 19 (51)
Other non-cash items, net (7) 15
Changes in assets and liabilities:    
Accounts receivable 311 361
Inventories 17 (47)
Other operating assets 32 17
Accounts payable (30) (33)
Accrued expenses (198) (119)
Deferred revenue and financed unearned services revenue (83) (121)
Other operating liabilities (9) (9)
Net cash provided by operating activities 228 129
Cash flows from investing activities:    
Purchases of investments (285) (238)
Maturities, sales and collections of investments 598 1,016
Purchases of property and equipment (36) (38)
Other investing activities, net (1) 2
Net cash provided by investing activities 276 742
Cash flows from financing activities:    
Issuance of common stock under employee stock award plans 9 19
Repurchase of common stock (175) (430)
Repayment of short-term loan (850) 0
Dividends paid (53) (54)
Other financing activities, net (2) 1
Net cash used in financing activities (1,071) (464)
Effect of exchange rate changes on cash and cash equivalents (7) (5)
Net increase (decrease) in cash and cash equivalents (574) 402
Cash and cash equivalents:    
Beginning of period 2,868 1,922
End of period $ 2,294 $ 2,324