Business Segments - Net Sales by Product Class (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
Revenue from External Customer [Line Items]
Net sales	$ 365.9	$ 380.4	$ 371.1	$ 328.0	$ 378.2	$ 384.0	$ 368.4	$ 325.5	$ 1,445.4	$ 1,456.1	$ 1,570.1
Operating Segments | Commercial foodservice whole goods
Revenue from External Customer [Line Items]
Net sales									1,173.3	1,191.0	1,277.2
Operating Segments | Aftermarket parts and support
Revenue from External Customer [Line Items]
Net sales									$ 272.1	$ 265.1	$ 292.9