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Retirement Benefit Plans - Change in Benefit Obligation and Funded Status (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Apr. 24, 2020 | Apr. 26, 2019 | Apr. 27, 2018 | Apr. 24, 2020 | Apr. 26, 2019
Funded status at end of year: |  |  |  |  |
Underfunded status of the plans |  |  |  | $ (1,400) | $ (1,100)
Amounts recognized on the consolidated balance sheets consist of: |  |  |  |  |
Non-current liabilities |  |  |  | (1,910) | (1,651)
Pension benefits |  |  |  |  |
Plans with accumulated benefit obligations in excess of plan assets |  |  |  |  |
Accumulated benefit obligation |  |  |  | 5,105 | 4,683
Projected benefit obligation |  |  |  | 5,252 | 4,822
Plan assets at fair value |  |  |  | 4,074 | 3,829
Plans with projected benefit obligations in excess of plan assets |  |  |  |  |
Projected benefit obligation |  |  |  | 5,700 | 4,963
Plan assets at fair value |  |  |  | 4,331 | 3,833
U.S. Pension Benefits | Pension benefits |  |  |  |  |
Defined Benefit Plan Disclosure [Line items] |  |  |  |  |
Accumulated benefit obligation at end of year |  |  |  | 3,440 | 3,121
Change in projected benefit obligation: |  |  |  |  |
Projected benefit obligation at beginning of year | $ 3,404 | $ 3,202 |  |  |
Service cost | 106 | 109 | $ 116 |  |
Interest cost | 126 | 129 | 117 |  |
Employee contributions | 0 | 0 |  |  |
Plan curtailments and settlements | (94) | 0 |  |  |
Actuarial loss | 300 | 54 |  |  |
Benefits paid | (111) | (100) |  |  |
Currency exchange rate changes and other | (8) | 10 |  |  |
Projected benefit obligation at end of year | 3,723 | 3,404 | 3,202 |  |
Change in plan assets: |  |  |  |  |
Fair value of plan assets at beginning of year | 2,728 | 2,661 |  |  |
Actual return on plan assets | (72) | 64 |  |  |
Employer contributions | 444 | 93 |  |  |
Employee contributions | 0 | 0 |  |  |
Plan settlements | 0 | 0 |  |  |
Benefits paid | (111) | (100) |  |  |
Currency exchange rate changes and other | (7) | 10 |  |  |
Fair value of plan assets at end of year | 2,982 | 2,728 | 2,661 |  |
Funded status at end of year: |  |  |  |  |
Fair value of plan assets | 2,982 | 2,661 | 2,661 | 2,982 | 2,728
Benefit obligations | 3,404 | 3,404 | 3,202 | 3,723 | 3,404
Underfunded status of the plans |  |  |  | (741) | (676)
Recognized liability |  |  |  | (741) | (676)
Amounts recognized on the consolidated balance sheets consist of: |  |  |  |  |
Non-current assets |  |  |  | 0 | 0
Current liabilities |  |  |  | (17) | (18)
Non-current liabilities |  |  |  | (724) | (658)
Recognized liability |  |  |  | (741) | (676)
Amounts recognized in accumulated other comprehensive loss: |  |  |  |  |
Prior service cost (benefit) |  |  |  | 1 | 2
Net actuarial loss |  |  |  | 1,662 | 1,216
Ending balance |  |  |  | 1,663 | 1,218
Non-U.S. Pension Benefits | Pension benefits |  |  |  |  |
Defined Benefit Plan Disclosure [Line items] |  |  |  |  |
Accumulated benefit obligation at end of year |  |  |  | 1,785 | 1,621
Change in projected benefit obligation: |  |  |  |  |
Projected benefit obligation at beginning of year | 1,832 | 1,791 |  |  |
Service cost | 59 | 59 | 67 |  |
Interest cost | 28 | 30 | 28 |  |
Employee contributions | 11 | 12 |  |  |
Plan curtailments and settlements | (2) | (5) |  |  |
Actuarial loss | 180 | 119 |  |  |
Benefits paid | (55) | (49) |  |  |
Currency exchange rate changes and other | (29) | (125) |  |  |
Projected benefit obligation at end of year | 2,024 | 1,832 | 1,791 |  |
Change in plan assets: |  |  |  |  |
Fair value of plan assets at beginning of year | 1,409 | 1,404 |  |  |
Actual return on plan assets | 2 | 62 |  |  |
Employer contributions | 54 | 78 |  |  |
Employee contributions | 11 | 12 |  |  |
Plan settlements | (2) | (3) |  |  |
Benefits paid | (55) | (49) |  |  |
Currency exchange rate changes and other | (15) | (95) |  |  |
Fair value of plan assets at end of year | 1,404 | 1,409 | 1,404 |  |
Funded status at end of year: |  |  |  |  |
Fair value of plan assets | 1,409 | 1,409 | 1,404 | 1,404 | 1,409
Benefit obligations | $ 1,832 | $ 1,832 | $ 1,791 | 2,024 | 1,832
Underfunded status of the plans |  |  |  | (620) | (423)
Recognized liability |  |  |  | (620) | (423)
Amounts recognized on the consolidated balance sheets consist of: |  |  |  |  |
Non-current assets |  |  |  | 7 | 31
Current liabilities |  |  |  | (6) | (8)
Non-current liabilities |  |  |  | (621) | (446)
Recognized liability |  |  |  | (620) | (423)
Amounts recognized in accumulated other comprehensive loss: |  |  |  |  |
Prior service cost (benefit) |  |  |  | 7 | (7)
Net actuarial loss |  |  |  | 663 | 452
Ending balance |  |  |  | $ 670 | $ 445

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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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- Definition Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 + Details
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- Definition Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 + Details
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- Definition Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 + Details
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- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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