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v3.8.0.1

Short-term Borrowings and Long-term Debt (Details) $ in Millions | 12 Months Ended
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Jan. 31, 2018 USD ($) Financial_institution | Jan. 31, 2017 USD ($) Financial_institution | Jan. 31, 2016 USD ($)
Debt Instrument [Line Items] |  |  |
Short-term borrowings | $ 5,257 | $ 1,099 |
Short-term debt, weighted average interest rate, at point in time | 1.50% | 6.20% |
Number of financial institutions committing to lend funds under lines of credit | Financial_institution | 23 | 23 |
Available | $ 12,500 | $ 12,500 |
Letters of credit outstanding, amount | 2,600 | 3,600 |
Secured long-term debt, noncurrent | 10 | 14 |
Carrying value of property collateralizing long term debt | 101 | 82 |
Payment for debt extinguishment or debt prepayment cost | 3,059 | 0 | $ 0
Gain (loss) on extinguishment of debt | $ (3,136) | 0 | $ 0
Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, basis spread on variable rate | 10.00% |  |
Line of credit facility, commitment fee percentage | 1.50% |  |
Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, basis spread on variable rate | 75.00% |  |
Line of credit facility, commitment fee percentage | 4.00% |  |
Unused lines of Credit [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Undrawn | $ 12,500 | 12,500 |
Put Option [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross | 500 | $ 500 |
Walmart International |  |  |
Debt Instrument [Line Items] |  |  |
Available | 4,000 |  |
Walmart International | Unused lines of Credit [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Undrawn | $ 0 |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629 + Details
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