Annual report pursuant to Section 13 and 15(d)

Schedule II - Valuation and Qualifying Reserves (Details)

v3.8.0.1
Schedule II - Valuation and Qualifying Reserves (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Provision for bad debts      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year $ 0.6 $ 0.9 $ 0.7
Additions charged to earnings 0.1 0.1 0.3
Deductions (0.1) (0.4) (0.1)
Balance at end of year 0.6 0.6 0.9
Provision for discounts      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year 5.7 9.6 8.6
Additions charged to earnings 68.6 81.5 86.6
Deductions (67.5) (85.4) (85.6)
Balance at end of year 6.8 5.7 9.6
Provision for warranties      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year 7.5 7.3 7.7
Additions charged to earnings 13.0 11.8 9.9
Deductions (12.8) (11.6) (10.3)
Balance at end of year 7.7 7.5 7.3
Reserve for inventories      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year 1.4 1.2 1.2
Additions charged to earnings 0.6 1.2 1.4
Deductions (0.2) (1.0) (1.4)
Balance at end of year $ 1.8 $ 1.4 $ 1.2