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Derivatives and Currency Exchange Risk Management , Offsetting of Assets and Liabilities (Details) - USD ($) $ in Millions | Apr. 28, 2017 | Apr. 29, 2016
--- | --- | ---
Offsetting Assets [Line Items] |  |
Derivative Assets, Gross Amount of Recognized Assets (Liabilities) | $ 262 | $ 248
Derivative Assets, Gross Amount Not Offset on the Balance Sheet, Financial Instruments | (75) | (118)
Derivative Assets, Gross Amount Not Offset on the Balance Sheet, Cash Collateral (Received) or Posted | (60) | (1)
Derivative Assets, Net Amount | 127 | 129
Derivative Liabilities, Gross Amount of Recognized Assets (Liabilities) | (104) | (219)
Derivative Liabilities, Gross Amount Not Offset on the Balance Sheet, Financial Instruments | 75 | 119
Derivative Liabilities, Gross Amount Not Offset on the Balance Sheet, Cash Collateral (Received) or Pledged | 0 | 26
Derivative Liabilities, Net Amount | (29) | (74)
Total Derivatives, Gross Amount of Recognized Assets (Liabilities) | 158 | 29
Total Derivatives, Gross Amount Not Offset on the Balance Sheet, Financial Instruments | 0 | 1
Total Derivatives, Gross Amount Not Offset on the Balance Sheet, Cash Collateral (Received) or Posted | (60) | 25
Total Derivatives, Net Amount | 98 | 55
Currency exchange rate contracts |  |
Offsetting Assets [Line Items] |  |
Derivative Assets, Gross Amount of Recognized Assets (Liabilities) | 216 | 145
Derivative Assets, Gross Amount Not Offset on the Balance Sheet, Financial Instruments | (58) | (98)
Derivative Assets, Gross Amount Not Offset on the Balance Sheet, Cash Collateral (Received) or Posted | (55) | (1)
Derivative Assets, Net Amount | 103 | 46
Derivative Liabilities, Gross Amount of Recognized Assets (Liabilities) | (93) | (166)
Derivative Liabilities, Gross Amount Not Offset on the Balance Sheet, Financial Instruments | 73 | 85
Derivative Liabilities, Gross Amount Not Offset on the Balance Sheet, Cash Collateral (Received) or Pledged | 0 | 26
Derivative Liabilities, Net Amount | (20) | (55)
Interest rate contracts |  |
Offsetting Assets [Line Items] |  |
Derivative Assets, Gross Amount of Recognized Assets (Liabilities) | 41 | 89
Derivative Assets, Gross Amount Not Offset on the Balance Sheet, Financial Instruments | (15) | (20)
Derivative Assets, Gross Amount Not Offset on the Balance Sheet, Cash Collateral (Received) or Posted | (5) | 0
Derivative Assets, Net Amount | 21 | 69
Derivative Liabilities, Gross Amount of Recognized Assets (Liabilities) |  | (48)
Derivative Liabilities, Gross Amount Not Offset on the Balance Sheet, Financial Instruments |  | 34
Derivative Liabilities, Gross Amount Not Offset on the Balance Sheet, Cash Collateral (Received) or Pledged |  | 0
Derivative Liabilities, Net Amount |  | (14)
Cross currency interest rate contracts |  |
Offsetting Assets [Line Items] |  |
Derivative Assets, Gross Amount of Recognized Assets (Liabilities) | 5 | 14
Derivative Assets, Gross Amount Not Offset on the Balance Sheet, Financial Instruments | (2) | 0
Derivative Assets, Gross Amount Not Offset on the Balance Sheet, Cash Collateral (Received) or Posted | 0 | 0
Derivative Assets, Net Amount | 3 | 14
Derivative Liabilities, Gross Amount of Recognized Assets (Liabilities) | (11) | (4)
Derivative Liabilities, Gross Amount Not Offset on the Balance Sheet, Financial Instruments | 2 | 0
Derivative Liabilities, Gross Amount Not Offset on the Balance Sheet, Cash Collateral (Received) or Pledged | 0 | 0
Derivative Liabilities, Net Amount | $ (9) | (4)
Commodity contracts |  |
Offsetting Assets [Line Items] |  |
Derivative Liabilities, Gross Amount of Recognized Assets (Liabilities) |  | (1)
Derivative Liabilities, Gross Amount Not Offset on the Balance Sheet, Financial Instruments |  | 0
Derivative Liabilities, Gross Amount Not Offset on the Balance Sheet, Cash Collateral (Received) or Pledged |  | 0
Derivative Liabilities, Net Amount |  | $ (1)

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- Definition Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226016-175313 + Details
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- Definition Amount of obligation to return securities collateral under master netting arrangements that have not been offset against derivative assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226016-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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- Definition The net amount as of the balance sheet date of the fair value of derivative assets and derivative liabilities that in accordance with the entity's accounting policy were offset against collateral under a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41678-113959 + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226000-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=82924980&loc=SL51823488-111719 + Details
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- Definition Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226006-175313 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41678-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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