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Retirement Benefit Plans , Net Periodic Cost and AOCI (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Apr. 28, 2017 | Apr. 29, 2016 | Apr. 24, 2015
Net Periodic Benefit Cost |  |  |
Special termination benefits | $ 73 |  |
U.S. Pension Benefits | Pension benefits |  |  |
Net Periodic Benefit Cost |  |  |
Service cost | 117 | $ 120 | $ 104
Interest cost | 109 | 122 | 105
Expected return on plan assets | (195) | (180) | (160)
Amortization of prior service cost | 1 | 0 | 0
Amortization of net actuarial loss | 88 | 98 | 65
Settlement gain | 0 | (1) | 0
Special termination benefits | 60 | 0 | 0
Net periodic benefit cost | 180 | 159 | 114
Amounts Recognized in AOCI |  |  |
Net actuarial (gain) loss | (61) |  |
Amortization of prior service cost | (1) |  |
Amortization of net actuarial loss | (88) |  |
Prior service cost | 0 |  |
Effect of exchange rates | 0 |  |
Total (gain) loss recognized in accumulated other comprehensive loss | (150) |  |
Total loss recognized in net periodic benefit cost and accumulated other comprehensive loss | 30 |  |
Non-U.S. Pension Benefits | Pension benefits |  |  |
Net Periodic Benefit Cost |  |  |
Service cost | 70 | 81 | 60
Interest cost | 26 | 31 | 33
Expected return on plan assets | (48) | (48) | (41)
Amortization of prior service cost | (1) | 0 | 0
Amortization of net actuarial loss | 17 | 20 | 12
Settlement gain | 0 | (10) | 0
Special termination benefits | 0 | 0 | 0
Net periodic benefit cost | 64 | $ 74 | $ 64
Amounts Recognized in AOCI |  |  |
Net actuarial (gain) loss | 121 |  |
Amortization of prior service cost | 1 |  |
Amortization of net actuarial loss | (17) |  |
Prior service cost | 8 |  |
Effect of exchange rates | (13) |  |
Total (gain) loss recognized in accumulated other comprehensive loss | 100 |  |
Total loss recognized in net periodic benefit cost and accumulated other comprehensive loss | $ 164 |  |

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- Definition Before tax amount, net of reclassifications, of pension and other postretirement benefit plans (gain) loss included in comprehensive income. + References No definition available. + Details
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- Definition Defined Benefit Plan and Defined Contribution Plan, Cost of Providing Special and Contractual Termination Benefits + References No definition available. + Details
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- Definition Foreign exchange adjustment to pension and other postretirement benefit plans (gain) loss included in accumulated other comprehensive income. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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