Annual report pursuant to Section 13 and 15(d)

Nature of Operations - Sales by Geographic Region (Details)

v3.8.0.1
Nature of Operations - Sales by Geographic Region (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net sales $ 262.7 $ 308.5 $ 297.3 $ 265.2 $ 271.7 $ 313.4 $ 323.7 $ 284.4 $ 1,133.7 $ 1,193.2 $ 1,188.7
United States                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net sales                 956.4 1,015.9 1,017.9
Other                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net sales                 $ 177.3 $ 177.3 $ 170.8