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Summary of Significant Accounting Policies (Gross Carrying Amount and Accumulated Amortization of Intangible Assets) (Details) $ in Millions | Jan. 31, 2021 USD ($)
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Finite-Lived Intangible Assets [Line Items] |
Accumulated Amortization | $ (169)
Total Intangible Assets | 3,781
Trade Names |
Indefinite-lived Intangible Assets [Line Items] |
Indefinite-Lived Intangible Assets | 649
Customer Relationships |
Finite-Lived Intangible Assets [Line Items] |
Gross Carrying Amount | 2,965
Accumulated Amortization | (157)
Trade Names |
Finite-Lived Intangible Assets [Line Items] |
Gross Carrying Amount | 151
Accumulated Amortization | (1)
Other Finite-Lived Intangible Assets |
Finite-Lived Intangible Assets [Line Items] |
Gross Carrying Amount | 16
Accumulated Amortization | $ (11)

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