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Share-Based Compensation Plans (Tables)
 12 Months Ended
Oct. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Compensation Expense by Type of Award and Related Income Tax Benefit
Compensation Expense by Type of Award and Related Income Tax Benefit
 
Years Ended October 31,
(in millions)
2015
 
2014
 
2013
RSUs
$
6.9

 
$
7.3

 
$
5.3

Performance shares
6.5

 
6.4

 
5.8

Stock options
0.8

 
2.1

 
1.7

Share-based compensation expense before income taxes
14.2

 
15.8

 
12.8

Income tax benefit
(5.9
)
 
(6.7
)
 
(5.0
)
Share-based compensation expense, net of taxes
$
8.3

 
$
9.1

 
$
7.8
RSU Activity
RSU Activity
 
Number of Shares (in millions)
 
Weighted-Average Grant Date Fair Value per Share
Outstanding at November 1, 2014
1.4

 
$
23.4

Granted
0.4

 
29.3

Vested (including 0.1 shares withheld for income taxes)
(0.4
)
 
22.2

Forfeited
(0.1
)
 
24.4

Outstanding at October 31, 2015
1.3

 
25.8
Stock Options Activity
Stock Option Activity
 
Number of Shares
(in millions)
 
Weighted-Average Exercise Price per Share
 
Weighted-Average Remaining Contractual Term (in years)(2)
 
Aggregate Intrinsic Value(1) (in millions)
Outstanding at November 1, 2014
1.8

 
$
20.2

 
 
 
 
Forfeited or expired
(0.2
)
 
22.3

 
 
 
 
Exercised
(0.8
)
 
20.2

 
 
 
 
Outstanding at October 31, 2015
0.8

 
$
19.7

 
3.2
 
$
6.7

Exercisable at October 31, 2015
0.3

 
$
18.5

 
3.2
 
$
3.2

(1) Amount by which the current market price of our common stock on October 31, 2015 exceeds the exercise price.
(2) Excludes contractual terms associated with plans prior to the 2006 Equity Plan due to the uncertainty of expiration.
Performance Share Activity
Performance Share Activity
 
Number of Shares (in millions)
 
Weighted-Average Grant Date Fair Value per Share
Outstanding at November 1, 2014
1.1

 
$
23.9

Granted
0.5

 
29.8

Vested (including 0.1 shares withheld for income taxes)
(0.2
)
 
23.0

Performance adjustments
(0.1
)
 
25.1

Forfeited
(0.2
)
 
24.3

Outstanding at October 31, 2015
1.1

 
$
26.4
Assumptions Used in Option Valuation Model
Assumptions
 
Monte Carlo
 
Monte Carlo
 
Black-Scholes
 
2015
 
2014
 
2013
Expected life(1)
2.15 years

 
2.15 years

 
5.37 years

Expected stock price volatility(2)
18.9
%
 
19.0
%
 
38.8
%
Expected dividend yield(3)
2.4
%
 
2.4
%
 
2.4
%
Risk-free interest rate(4)
0.8
%
 
0.6
%
 
1.8
%
Stock price(5)
$
30.3

 
$
26.6

 
N/A*

Weighted average fair value of option grants
N/A

 
N/A

 
$
7.5

*
Not Applicable
(1) For TSR awards valued under the Monte Carlo simulation model, the expected life represents the remaining performance period of the awards. For stock options valued under the Black-Scholes options-pricing model, the expected life is based on observed historical exercise patterns of the previously granted options adjusted to reflect the change in vesting and expiration dates.
(2) For the Monte Carlo simulation model, the expected volatility for each grant is determined based on the historical volatility of our common stock over a period equal to the remaining term of the performance period from the date of grant for all awards. For the Black-Scholes options-pricing model, the expected volatility is based on considerations of implied volatility from publicly traded and quoted options on our common stock and the historical volatility of our common stock.
(3) The dividend yield is based on the historical dividend yield over the expected life of the awards granted.
(4) For the Monte Carlo simulation and Black-Scholes options-pricing models, the risk-free interest rate is based on the continuous compounded yield on U.S. Treasury Constant Maturity Rates with varying remaining terms. For TSR awards valued under the Monte Carlo simulation model, the remaining term is determined over a period of time that is commensurate with the performance period from the grant date. For stock option awards valued under the Black-Scholes options-pricing models, the remaining term is equal to the expected term of the option.
(5) The stock price is the closing price of our common stock on the valuation date.
Employee Stock Purchase Plan
Employee Stock Purchase Plan
 
Years Ended October 31,
(in millions, except per share amounts)
2015
2014
 
2013
Weighted average fair value of granted purchase rights per share
$
1.5

$
1.4

 
$
1.1

Common stock issued
0.2
0.2

 
0.2

Fair value of common stock issued per share
$
28.8

$
25.8

 
$
21.3

Aggregate purchases
$
4.7

$
4.3

 
$
4.0