XML 61 R47.htm IDEA: XBRL DOCUMENT v3.7.0.1
Fair Value Measurement - Narrative (Details) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Deferred compensation investments $ 28.6 $ 28.6
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value of total long-term debt $ 4,120.0 $ 4,190.0