Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Additional Information) (Details)

v3.8.0.1
STOCK-BASED COMPENSATION (Additional Information) (Details)
$ in Millions
1 Months Ended 12 Months Ended
May 31, 2013
shares
Dec. 31, 2017
USD ($)
plan
shares
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of share-based award plans | plan   1    
Increase in reserve under share-based award plan, number of shares (in shares) | shares 11,000,000      
Total income tax benefit recognized for stock-based compensation expense   $ 13.7 $ 13.3 $ 13.7
Cash provided by operating activities   816.0 823.0 769.1
Cash used in financing activities   (263.7) 1,160.3 (639.0)
Excess tax benefits from stock-based compensation plans, operating activities   0.0 35.9 30.0
Excess tax benefits from stock-based compensation plans, financing activities   $ 0.0 35.9 30.0
Stock options vesting percentage for each year of completed service   33.00%    
Stock options expiration periods   10 years    
Minimum percentage of target to which shares may be issued   0.00%    
Maximum percentage of target to which shares may be issued   200.00%    
Percentage of target that shares may be issued   100.00%    
Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based payment award options nonvested number of shares | shares   278,644    
Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based payment award options nonvested number of shares | shares   557,288    
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total intrinsic value of stock options exercised   $ 31.4 64.8 52.3
Total unrecognized compensation cost   $ 4.3    
Total unrecognized compensation cost, weighted-average period of recognition   1 year 6 months    
Stock Options | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock awards vesting periods (up to)   3 years    
Nonvested Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total unrecognized compensation cost   $ 32.1    
Total unrecognized compensation cost, weighted-average period of recognition   2 years    
Total weighted-average fair value of nonvested stock vested, based on the vesting date   $ 79.4 71.7 65.0
Total weighted-average fair value of nonvested stock vested, based on the grant date   $ 45.0 $ 38.8 $ 31.3
Nonvested Stock | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock awards vesting periods (up to)   1 year    
Nonvested Stock | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock awards vesting periods (up to)   3 years    
Accounting Standards Update 2016-09        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Cash provided by operating activities   $ 26.7    
Cash used in financing activities   $ (26.7)