Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of financial assets and liabilities (Details)

v3.2.0.727
Fair Value Measurements - Schedule of financial assets and liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 19, 2014
Jun. 30, 2014
Level 1      
Assets:      
Cash and cash equivalents $ 45.6    
Investments in rabbi trust 4.8    
Derivative instruments 0.0    
Liabilities:      
Derivative instruments 0.0    
Level 2      
Assets:      
Cash and cash equivalents 0.0    
Investments in rabbi trust 0.0    
Derivative instruments 1.6    
Liabilities:      
Derivative instruments 6.8    
Level 3      
Assets:      
Cash and cash equivalents 0.0    
Investments in rabbi trust 0.0    
Derivative instruments 0.0    
Liabilities:      
Derivative instruments 0.0    
$150 senior unsecured notes      
Financial assets and liabilities at carrying value and fair value      
Debt instrument, face amount 150.0   $ 150.0
$150 senior unsecured notes | Level 1      
Liabilities:      
Debt instruments 163.1    
$150 senior unsecured notes | Level 2      
Liabilities:      
Debt instruments 0.0    
$150 senior unsecured notes | Level 3      
Liabilities:      
Debt instruments 0.0    
Revolving credit facility | Level 1      
Liabilities:      
Debt instruments 0.0    
Revolving credit facility | Level 2      
Liabilities:      
Debt instruments 105.8    
Revolving credit facility | Level 3      
Liabilities:      
Debt instruments 0.0    
Term loan      
Financial assets and liabilities at carrying value and fair value      
Debt instrument, face amount   $ 0.0  
Term loan | Level 1      
Liabilities:      
Debt instruments 0.0    
Term loan | Level 2      
Liabilities:      
Debt instruments 173.2    
Term loan | Level 3      
Liabilities:      
Debt instruments 0.0    
$100 Series A Notes      
Financial assets and liabilities at carrying value and fair value      
Debt instrument, face amount 100.0   $ 100.0
$100 Series A Notes | Level 1      
Liabilities:      
Debt instruments 0.0    
$100 Series A Notes | Level 2      
Liabilities:      
Debt instruments 100.0    
$100 Series A Notes | Level 3      
Liabilities:      
Debt instruments 0.0    
Derivatives | Cash flow hedging      
Financial assets and liabilities at carrying value and fair value      
Derivative, notional amount 118.3    
Carrying value      
Assets:      
Cash and cash equivalents 45.6    
Investments in rabbi trust 4.8    
Derivative instruments 1.6    
Liabilities:      
Derivative instruments 6.8    
Carrying value | $150 senior unsecured notes      
Liabilities:      
Debt instruments 149.1    
Carrying value | Revolving credit facility      
Liabilities:      
Debt instruments 105.8    
Carrying value | Term loan      
Liabilities:      
Debt instruments 173.2    
Carrying value | $100 Series A Notes      
Liabilities:      
Debt instruments $ 100.0