Common Shares and Earnings per Share Weighted Average Share (Details) - shares shares in Millions	3 Months Ended
Feb. 29, 2020	Feb. 28, 2019
Weighted-average shares outstanding:
Shares used in basic EPS calculation	395.7	398.0
Effect of dilutive securities:
RSUs/RSAs	3.8	3.0
Stock options	4.6	7.0
Shares used in diluted EPS calculation	404.1	408.0

Number of additional shares included in diluted EPS for potentially dilutive effect of nonvested equity-based payment award containing forfeitable rights to dividends or dividend equivalents, whether paid or unpaid.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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