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Share-Based Compensation (Details)
$ in Millions
3 Months Ended
May 31, 2017
USD ($)
company
shares
Feb. 28, 2017
USD ($)
shares
Nov. 30, 2016
USD ($)
company
shares
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted (in shares) 172,227   142,635
Vesting term 5 years   5 years
Vesting percentage per year 20.00%   20.00%
Shares granted, fair value | $ $ 3   $ 3
Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted (in shares) 167,358   134,899
Performance Shares | Total Shareholder Return (TSR)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted (in shares) 81,262   65,506
Shares granted, fair value | $ $ 2   $ 2
Total Shareholder Return Designated Peer Group | company 16   16
Performance period 2 years 4 months 5 days   2 years 10 months
Performance Shares | Total Shareholder Return (TSR) | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Based Awards Award Payouts Threshold 50.00%   50.00%
Performance Shares | Total Shareholder Return (TSR) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Based Awards Award Payouts Threshold 200.00%   200.00%
Performance Shares | Cash Flow Return on Investment (CFROI)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted (in shares) 86,096   69,393
Shares granted, fair value | $ $ 2   $ 2
Performance period 2 years 6 months   3 years
Performance Shares | Cash Flow Return on Investment (CFROI) | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Based Awards Award Payouts Threshold 50.00%   50.00%
Performance Shares | Cash Flow Return on Investment (CFROI) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Based Awards Award Payouts Threshold 200.00%   200.00%
Non-employee Directors | Deferred Stock Units (DSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted (in shares)   30,312  
Shares granted, fair value | $   $ 1