XML 52 R41.htm IDEA: XBRL DOCUMENT v3.19.1
Fair Value Measurements Financial Assets and Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]    
Cash and Cash Equivalents - Fair Value $ 15.3 $ 3.6
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Debt Instrument, Fair Value Disclosure 3,728.6 3,714.6
Finance Lease, Liability, Noncurrent 7.3 7.5
Unamortized Debt Issuance Expense 6.6 7.1
Carrying Amount    
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]    
Cash and Cash Equivalents - Fair Value 15.3 3.6
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Debt Instrument, Fair Value Disclosure 3,646.7 [1] 3,700.9 [2]
Fair Value | Fair Value, Inputs, Level 1    
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]    
Cash and Cash Equivalents - Fair Value 15.3 3.6
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Debt Instrument, Fair Value Disclosure 0.0 0.0
Fair Value | Fair Value, Inputs, Level 2    
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]    
Cash and Cash Equivalents - Fair Value 0.0 0.0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Debt Instrument, Fair Value Disclosure 3,728.6 3,714.6
Fair Value | Fair Value, Inputs, Level 3    
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]    
Cash and Cash Equivalents - Fair Value 0.0 0.0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Debt Instrument, Fair Value Disclosure $ 0.0 $ 0.0
[1] The carrying amount of long-term debt excludes a $7.3 million long-term finance lease obligation and $6.6 million of unamortized debt issuance costs.
[2] The carrying amount of long-term debt excludes a $7.5 million long-term finance lease obligation and $7.1 million of unamortized debt issuance costs.