Stockholders' Equity and Equity Instruments (Tables)
9 Months Ended
Sep. 30, 2011
Stockholders' Equity and Equity Instruments [Abstract] 
Range of Estimates and Calculated Fair Values of Options Granted in Period
   
Range
 
Fair value of options granted
 $28.17 - $29.35 
Exercise price
 $86.47 - $86.80 
Expected term (years)
 3 - 6 
Expected volatility
 42.7% - 51.9% 
Dividend yield
 2.4% 
Risk-free rate of return
 1.4% - 2.3% 
Stock-based Compensation Activity
The following table summarizes stock-based compensation activity during the nine months ended September 30, 2011.

   
Stock Options
  
RSUs
  
PSUs
 
   
 
Number
  
Weighted-average
exercise price
  
 
Number
  
Weighted-average
fair value
  
 
Number
  
Weighted-average
fair value
 
Outstanding at December 31, 2010
  621,374  $47.19   109,751  $64.03   6,366  $86.51 
Granted
  71,709   86.47   33,595   86.47   19,139   93.82 
Exercised (a)
  (61,013)  30.91   -   -   -   - 
Released from restriction (a)
  -   -   (32,202)  55.74   -   - 
Cancelled/Expired
  (3,436)  70.74   (1,111)  71.47   (107)  93.82 
Outstanding at September 30, 2011
  628,634  $53.12   110,033  $73.23   25,398  $91.99 
Other Comprehensive Income
The components of and changes in accumulated other comprehensive income as of and for the nine months ended September 30, 2011 are as follows (in millions):

   
Balance
 December 31,
2010
  
 
2011
Change
  
Balance
September 30,
2011
 
Unrealized gain (loss) on net pension costs
 $(14.1) $4.5  $(9.6)
Unrealized gain (loss) on cash flow hedges
  (4.7)  1.7   (3.0)
Cumulative foreign currency translation adjustment
  64.8   (13.9)  50.9 
Accumulated other comprehensive income
 $46.0  $(7.7) $38.3