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Postretirement and Other Benefits - PBO and ABO in Excess of Fair Value of Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
United States, Pension Benefits [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
PBO $ 123.4 $ 132.4  
ABO 123.4 132.4  
Fair value of plan assets 116.7 128.9 $ 126.0
France, Pension Benefits [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
PBO 32.2 37.3  
ABO 28.3 32.2  
Fair value of plan assets $ 8.4 $ 10.2 $ 12.3