XML 80 R61.htm IDEA: XBRL DOCUMENT v3.8.0.1
DEBT (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2015
Mar. 31, 2018
Dec. 31, 2016
Aug. 31, 2016
Mar. 31, 2013
Mar. 31, 2008
Debt Instrument [Line Items]            
Amount outstanding under revolving credit facility   $ 0        
Revolving credit facility draw down amount without violating covenant   $ 364,000,000        
Repayments of debt     $ 300,600,000      
Repurchase amount     $ 180,500,000      
Revolving Credit Facility            
Debt Instrument [Line Items]            
Term of facility 5 years          
Line of credit facility $ 400,000,000.0          
2013 Notes            
Debt Instrument [Line Items]            
Increase in interest rate for every one-notch downgrade of long-term credit ratings below investment grade   0.25%        
Maximum aggregate increase in interest rate related to downgrade of long-term credit ratings below investment grade   2.00%        
Two Point Three Seven Five Percent Notes, Due March Two Thousand Sixteen            
Debt Instrument [Line Items]            
Principal amount         $ 250,000,000.0  
Interest rate         2.375%  
Four Point Six Zero Percent Notes, Due March Two Thousand Twenty            
Debt Instrument [Line Items]            
Principal amount         $ 500,000,000.0  
Interest rate         4.60%  
Five Point Zero Percent Notes, Due March Two Thousand Twenty-Three            
Debt Instrument [Line Items]            
Principal amount         $ 500,000,000.0  
Interest rate         5.00%  
Six Point Nine Five Percent Notes, Due March Two Thousand Forty-Three            
Debt Instrument [Line Items]            
Principal amount         $ 250,000,000.0  
Interest rate         6.95%  
Six Point Five Percent Notes Due March Two Thousand Nineteen            
Debt Instrument [Line Items]            
Principal amount           $ 350,000,000.0
Interest rate           6.50%
Four Point Two Percent Notes, Due July Two Thousand Eighteen            
Debt Instrument [Line Items]            
Interest rate     4.20%      
Repayments of debt     $ 238,400,000      
Five Point Seven Five Percent Notes, Due March Two Thousand Eighteen            
Debt Instrument [Line Items]            
Interest rate     5.75%      
Notes Payable, Other Payables            
Debt Instrument [Line Items]            
Covenant, minimum required offer to repurchase, percentage of aggregate principal amount   101.00%        
Seven Point Eight Seven Five Percent Notes, Due August Two Thousand Twenty Two            
Debt Instrument [Line Items]            
Principal amount       $ 500,000,000.0    
Interest rate       7.875%    
Covenant, minimum required offer to repurchase, percentage of aggregate principal amount   101.00%        
AIO            
Debt Instrument [Line Items]            
Standby letters of credit, recorded liability   $ 36,000,000        
LIBOR | Revolving Credit Facility            
Debt Instrument [Line Items]            
Basis spread on variable rate 2.50%          
Base Rate | Revolving Credit Facility            
Debt Instrument [Line Items]            
Basis spread on variable rate 1.50%