Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS Fair Value Measurements (Narrative) (Details)

v3.6.0.2
FAIR VALUE MEASUREMENTS Fair Value Measurements (Narrative) (Details)
$ in Millions
Dec. 31, 2016
USD ($)
Oct. 31, 2016
Dec. 31, 2015
USD ($)
May 31, 2014
Debt Fair Value [Line Items]        
Put option specific events trigger put option certain to occur 1      
5.375% Senior Notes due 2022 [Member]        
Debt Fair Value [Line Items]        
Interest rate, stated percentage 5.375%     5.375%
4.875% Senior Notes Due 2024 [Member]        
Debt Fair Value [Line Items]        
Interest rate, stated percentage 4.875% 4.875%    
2.5% Convertible Senior Notes Due 2019 [Member]        
Debt Fair Value [Line Items]        
Interest rate, stated percentage 2.50%     2.50%
7% Senior Notes Due 2020 [Member]        
Debt Fair Value [Line Items]        
Interest rate, stated percentage   7.00%    
Fixed Rate Debt With Noncontrolling Interest Partner [Member]        
Estimate of fair value not practicable [Abstract]        
Face amount of debt $ 35.9   $ 33.2  
Level 3 [Member]        
Debt Fair Value [Line Items]        
Third party put option to sell NCI 1      
Level 2 [Member] | 5.375% Senior Notes due 2022 [Member]        
Debt Fair Value [Line Items]        
Interest rate, stated percentage 5.375%   5.375%  
Estimated fair values of senior notes $ 259.7   $ 249.4  
Level 2 [Member] | 4.875% Senior Notes Due 2024 [Member]        
Debt Fair Value [Line Items]        
Interest rate, stated percentage 4.875%      
Estimated fair values of senior notes $ 578.5      
Level 2 [Member] | 2.5% Convertible Senior Notes Due 2019 [Member]        
Debt Fair Value [Line Items]        
Interest rate, stated percentage 2.50%   2.50%  
Estimated fair values of convertible senior notes $ 294.6   $ 280.2  
Level 2 [Member] | 7% Senior Notes Due 2020 [Member]        
Debt Fair Value [Line Items]        
Interest rate, stated percentage     7.00%  
Estimated fair values of senior notes     $ 443.1