Annual report pursuant to Section 13 and 15(d)

Nature of Operations - Narrative (Details)

v3.8.0.1
Nature of Operations - Narrative (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
Segment Reporting Information [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
Customer A                      
Segment Reporting Information [Line Items]                      
Net sales                 128.4    
Customer B                      
Segment Reporting Information [Line Items]                      
Net sales                 $ 126.0