Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Accrued expenses	$ 74.5	$ 40.8
Warranty accrual	19.7	22.0
Deferred compensation	16.2	14.0
Allowance for doubtful accounts	10.3	11.9
Inventories	26.1	12.7
Deferred revenue	19.1	20.1
Pension and post-retirement benefits	92.3	70.4
Tax credits	52.1	62.5
Net operating loss carryforwards	88.4	58.5
Capital loss carryforwards	1.8	1.9
State deferred taxes	17.1	16.3
Other	0.5	12.1
Deferred Tax Assets, Gross	418.1	343.2
Valuation allowance	(87.8)	(63.9)
Net deferred tax assets	330.3	279.3
Deferred tax liabilities
Property, plant and equipment	39.7	20.5
Goodwill and intangible assets	271.5	17.6
Partnership interest	3.7	7.7
Undistributed earnings	6.5	7.3
Net deferred tax liabilities	321.4	53.1
Net deferred tax asset	$ 8.9	$ 226.2