XML 73 R59.htm IDEA: XBRL DOCUMENT v3.10.0.1
Debt - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2018
Apr. 30, 2018
Dec. 31, 2017
Nov. 14, 2014
Debt Instrument [Line Items]            
Loss on debt extinguishment $ (7.1)   $ (25.7)      
Capitalization of financing costs 3.6   3.6      
Fair value of our indebtedness 678.3   678.3   $ 1,154.1  
Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Available capacity for letters of credit 300.0   $ 300.0   $ 130.0 $ 130.0
Line of credit maturity period     2019-09      
2018 Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Available capacity for letters of credit       $ 300.0    
Line of credit maturity period     2023-04      
Term Debt [Member]            
Debt Instrument [Line Items]            
Debt instrument principal amount           $ 702.0
Term loan debt maturity period     2020-09      
Term debt final mandatory principal pre-payments   $ 0.3        
Senior Notes [Member]            
Debt Instrument [Line Items]            
Loss on debt extinguishment $ (18.6)          
2018 Term Debt [Member]            
Debt Instrument [Line Items]            
Debt instrument principal amount       $ 680.0    
Term loan debt maturity period     2025-04      
Interest rate description     Interest rate is reduced to LIBOR plus 3.00%