XML 102 R89.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stock-Based Compensation Plans - Stock-Based Awards (Details) - USD ($)
shares in Millions, $ in Millions
9 Months Ended 153 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
May 20, 2014
Stock-Based Compensation Plans        
Stock-Based Compensation Plans - Disclosures        
Compensation cost $ 60.7 $ 61.5    
Related income tax benefit 13.2 20.9    
Capitalized as part of an asset $ 1.5 $ 1.6    
Amended and Restated 2010 Stock Incentive Plan and 2005 Directors Stock Plan        
Stock-Based Compensation Plans - Disclosures        
Number of shares that will be granted       0.0
Stock Incentive Plan and Directors Stock Plan        
Stock-Based Compensation Plans - Disclosures        
Options granted (in shares)     0.0  
Awards or units granted (in shares)     0.0  
2014 Stock Incentive Plan and 2014 Directors Stock Plan        
Stock-Based Compensation Plans - Disclosures        
Maximum number of new shares of common stock available for grant (in shares) 7.3   7.3