Long-term Debt (Tables)
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3 Months Ended |
Apr. 30, 2019 |
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| Long-term Debt, by Current and Noncurrent [Abstract] |
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| Schedule of Long-term Debt Instruments [Table Text Block] |
The following table provides the changes in the Company's long-term debt for the three months ended April 30, 2019: | | | | | | | | | | | | | | (Amounts in millions) | | Long-term debt due within one year | | Long-term debt | | Total | Balances as of February 1, 2019 | | $ | 1,876 |
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| $ | 43,520 |
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| $ | 45,396 |
| Proceeds from issuance of long-term debt | | — |
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| 3,978 |
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| 3,978 |
| Repayments of long-term debt | | (364 | ) |
| — |
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| (364 | ) | Other | | (48 | ) |
| (73 | ) |
| (121 | ) | Balances as of April 30, 2019 | | $ | 1,464 |
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| $ | 47,425 |
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| $ | 48,889 |
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| Schedule of Fiscal Year 2020 Debt Issuances [Table Text Block] |
Information on long-term debt issued during the three months ended April 30, 2019 for general corporate purposes is as follows: | | | | | | | | | | | | | | (Amounts in millions) | | | | | | | | | | | Issue Date | | Principal Amount | | Maturity Date | | Fixed vs. Floating | | Interest Rate | | Net Proceeds | April 23, 2019 | | 1,500 USD | | July 8, 2024 | | Fixed | | 2.850% | | $ | 1,493 |
| April 23, 2019 | | 1,250 USD | | July 8, 2026 | | Fixed | | 3.050% | | 1,242 |
| April 23, 2019 | | 1,250 USD | | July 8, 2029 | | Fixed | | 3.250% | | 1,243 |
| Total | | | | | | | | | | $ | 3,978 |
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| Schedule of Fiscal Year 2020 Debt Maturities [Table Text Block] |
The following table provides details of debt repayments during the three months ended April 30, 2019: | | | | | | | | | | | | (Amounts in millions) | | | | | | | | | Maturity Date | | Original Amount | | Fixed vs. Floating | | Interest Rate | | Repayment | February 1, 2019 | | 500 USD | | Fixed | | 4.125% | | $ | 364 |
| Total repayment of matured debt | | | | | | | | $ | 364 |
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