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Debt and Derivative Instruments - Short-term Debt (Details) - USD ($) | 6 Months Ended |  |
--- | --- | --- | ---
Aug. 02, 2020 | Mar. 31, 2020 | Feb. 29, 2020
Debt Instrument [Line Items] |  |  |
Maximum borrowing capacity of credit facility |  | $ 6,000,000,000.0 | $ 3,000,000,000.0
Maximum amount outstanding during period | $ 1,000,000,000.0 |  |
Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Maximum borrowing capacity of credit facility | 6,500,000,000 |  |
Revolving Credit Facility | Back-up Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Maximum borrowing capacity of credit facility | 3,500,000,000 |  |
Revolving Credit Facility | 5-year Back-up Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Maximum borrowing capacity of credit facility | $ 1,000,000,000.0 |  |
Expiration period | 364 days |  |
Revolving Credit Facility | Five year back up credit facility expiring December 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Maximum borrowing capacity of credit facility | $ 2,000,000,000.0 |  |
Expiration period | 5 years |  |

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- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, maximum month-end borrowings during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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