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Share-Based Compensation (Details)
$ in Millions
3 Months Ended
May 31, 2016
USD ($)
shares
Feb. 29, 2016
USD ($)
shares
Nov. 30, 2015
USD ($)
award
company
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Awards | award     2
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 157,403   203,728
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage     20.00%
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Total Fair Value | $ $ 3   $ 4
Restricted Stock Units (RSUs) | Two Year Vesting Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     48,163
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     2 years
Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 152,221   201,702
Performance Shares | Total Shareholder Return      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 73,546   99,860
Total Shareholder Return Designated Peer Group | company     16
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Total Fair Value | $ $ 2   $ 2
Performance Shares | Total Shareholder Return | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Based Awards Award Payouts Threshold     0.00%
Performance Shares | Total Shareholder Return | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Based Awards Award Payouts Threshold     200.00%
Performance Shares | Other Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 78,675   101,842
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years
Performance Based Awards, Cash Flow Return, Period of Measurement     3 years
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Total Fair Value | $ $ 2   $ 2
Performance Shares | Other Performance Shares | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Based Awards Award Payouts Threshold     0.00%
Performance Shares | Other Performance Shares | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Based Awards Award Payouts Threshold     200.00%
Non-employee Directors | Deferred Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   57,780  
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Total Fair Value | $   $ 1  
Non-employee Directors | Deferred Stock Units | Class A Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Number of Shares per Stock Unit   1