Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Feb. 29, 2020	Feb. 28, 2019
Income Tax Disclosure [Abstract]
Effective Income Tax Rate, Continuing Operations	1.00%	(1.00%)
Effective Income Tax Rate Reconciliation, Disposition of Business, Amount	$ 29
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-based Payment Arrangement, Amount	$ 64	$ 12
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount		$ 7

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the disposition of a business not qualifying as a discontinued operation.

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