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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($)
$ in Millions
3 Months Ended
Jul. 29, 2016
Jul. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]    
Net income (loss) $ 64 $ (30)
Other comprehensive income (loss):    
Foreign currency translation adjustments (6) (1)
Defined benefit obligations:    
Reclassification adjustments related to defined benefit obligations 0 1
Unrealized gains (losses) on available-for-sale securities:    
Unrealized holding gains (losses) arising during the period 3 (9)
Unrealized gains (losses) on cash flow hedges:    
Unrealized holding gains (losses) arising during the period 3 (2)
Reclassification adjustments for losses included in net income (loss) 0 1
Other comprehensive income (loss): 0 (10)
Comprehensive income (loss) $ 64 $ (40)