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Stock-based Compensation Plans - Schedule of Stock Options (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Oct. 31, 2016
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
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, Weighted Average Grant Date Fair Value   $ 10.53 $ 14.12  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Options, Outstanding, Number 2,886 3,657 5,000  
Options, Grants in Period, Net of Forfeitures 35 40 251  
Options, Exercises in Period 0 (44) (784)  
Options, Forfeitures and Expirations in Period (86) (767) (810)  
Options, Outstanding, Number 2,835 2,886 3,657  
Options, Exercisable, Number 2,695 2,407 2,637  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]        
Options, Outstanding, Weighted Average Exercise Price $ 39.33 $ 39.46 $ 37.94  
Options, Grants in Period, Weighted Average Exercise Price 10.60 37.03 38.51  
Options, Exercises in Period, Weighted Average Exercise Price 0.00 25.68 24.33  
Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price 42.30 40.60 44.41  
Options, Outstanding, Weighted Average Exercise Price 38.89 39.33 39.46  
Options, Exercisable, Weighted Average Exercise Price $ 39.29 $ 40.27 $ 41.34  
Performance-based Stock Options [Member]        
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, Nonvested, Number 973 1,409 941 299
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 30.47 $ 31.64 $ 35.41 $ 34.47
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 0 729 651  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 0.00 $ 27.61 $ 35.83  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period 436 261 9  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value $ 34.22 $ 33.99 $ 35.09  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Exercisable, Number 0 0 0  
Market-based Stock Options [Member] [Member]        
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, Nonvested, Number 567 615 670 759
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 27.24 $ 27.24 $ 27.24 $ 27.24
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period 48 55 89  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value $ 27.24 $ 27.24 $ 27.24  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Exercisable, Number 567 0 0  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Exercisable, Weighted Average Grant Date Fair Value $ 27.24 $ 0.00 $ 0.00  
Restricted Stock [Member]        
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, Aggregate Grant Date Fair Value $ 0.1 $ 1.1 $ 0.1  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 0 0 41 41
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 0.00 $ 0.00 $ 24.13 $ 24.13
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 5 2 4  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 12.52 $ 29.50 $ 33.70  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 5 43 4  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value $ 12.52 $ 24.38 $ 33.70