Employee Benefit Plans - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) plan	Dec. 31, 2013 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit pension plans | plan			2
Multiemployer plans cost		$ 0.9	$ 1.6
Withdrawal obligation	$ 12.2	13.1		$ 17.5
Multiemployer plan, withdrawal obligation quarterly installment payment amount	0.5
Total costs incurred under the Manitowoc Retirement Savings Plan	2.8	2.0	$ 1.5
Number of defined contribution retirement plans for the employees | plan			3
Welbilt Deferred Compensation Plan
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation plan assets, fair value	5.1	5.5
Company stock held in trust	0.2
Deferred compensation liability	(5.3)	(5.5)
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Plan obligation assumed	0.0	55.6
Pension plan assets assumed	0.0	34.1
Net periodic benefit cost next fiscal year	2.2
Minimum contribution next twelve months	8.4
Expected company paid claims	10.9
Accumulated benefit obligation	216.8	203.9
Postretirement Health and Other Plans
Defined Benefit Plan Disclosure [Line Items]
Plan obligation assumed	0.0	6.8
Pension plan assets assumed	0.0	0.0
Net transfer		28.3
Pension gains recognized in AOCI		$ 6.1
Net periodic benefit cost next fiscal year	$ 0.2
Annual rate of increase in health care benefits (as a percent)	6.30%
Ultimate health care cost trend rate (as a percent)	4.50%
Expected company paid claims	$ 1.3