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Unsecured Debt - Narrative (Details) € in Millions, £ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Nov. 30, 2017 USD ($) | Nov. 30, 2017 EUR (€) | Nov. 30, 2017 GBP (£) | Nov. 30, 2017 USD ($) | Dec. 01, 2016 USD ($) | Nov. 30, 2016 USD ($)
Debt Outstanding [Line Items] |  |  |  |  |  |
Repayments of commercial paper | $ 364,000,000 |  |  |  |  |
Unamortized debt issuance costs |  |  |  | $ (51,000,000) |  | $ (55,000,000)
Line of credit, maturity period | 12 years |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |
Debt Outstanding [Line Items] |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | 3,000,000,000.0 |  |
Long-term debt |  |  |  | 300,000,000 |  |
Line of credit facility available amount |  |  |  | 2,500,000,000 |  |
Debt instrument, basis spread on variable rate | 0.30% |  |  |  |  |
Revolving Credit Facility | Main Credit Facility |  |  |  |  |  |
Debt Outstanding [Line Items] |  |  |  |  |  |
Long-term debt |  |  |  | 2,700,000,000 |  |
Revolving Credit Facility | Main Credit Facility | U.S. Dollar Denominated Debt |  |  |  |  |  |
Debt Outstanding [Line Items] |  |  |  |  |  |
Long-term debt |  |  |  | $ 1,900,000,000 |  |
Revolving Credit Facility | Main Credit Facility | Euro Denominated |  |  |  |  |  |
Debt Outstanding [Line Items] |  |  |  |  |  |
Long-term debt | € |  | € 500 |  |  |  |
Revolving Credit Facility | Main Credit Facility | Sterling Denominated Debt |  |  |  |  |  |
Debt Outstanding [Line Items] |  |  |  |  |  |
Long-term debt | £ |  |  | £ 169 |  |  |
Other Assets | Accounting Standards Update 2015-03 |  |  |  |  |  |
Debt Outstanding [Line Items] |  |  |  |  |  |
Unamortized debt issuance costs |  |  |  |  | $ 55,000,000 |
Long-term Debt | Accounting Standards Update 2015-03 |  |  |  |  |  |
Debt Outstanding [Line Items] |  |  |  |  |  |
Unamortized debt issuance costs |  |  |  |  | $ (55,000,000) |
Commercial Paper |  |  |  |  |  |
Debt Outstanding [Line Items] |  |  |  |  |  |
Short-term borrowings | $ 111,000,000 |  |  |  |  |

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