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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 26, 2018 | Jan. 27, 2017 | Jan. 26, 2018 | Jan. 27, 2017
Statement Of Income And Comprehensive Income [Abstract] |  |  |  |
Net income (loss) | $ (506) | $ 146 | $ (195) | $ 319
Other comprehensive income (loss): |  |  |  |
Foreign currency translation adjustments | (5) | (3) | 3 | (14)
Defined benefit obligations: |  |  |  |
Defined benefit obligation adjustments | 0 | 25 | 0 | 25
Reclassification adjustments related to defined benefit obligations | (1) | 0 | (2) | 1
Income tax effect | 0 | (10) | 1 | (10)
Unrealized gains (losses) on available-for-sale securities: |  |  |  |
Unrealized holding gains (losses) arising during the period | (17) | (8) | (15) | (10)
Unrealized gains (losses) on cash flow hedges: |  |  |  |
Unrealized holding gains arising during the period | 0 | 5 | 0 | 8
Reclassification adjustments for gains included in net income | 0 | (5) | 0 | (6)
Other comprehensive income (loss) | (23) | 4 | (13) | (6)
Comprehensive income (loss) | $ (529) | $ 150 | $ (208) | $ 313

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