Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Accrued expenses	$ 64.0	$ 43.0
Warranty accrual	6.7	13.5
Deferred compensation	9.6	10.6
Allowances for doubtful accounts	3.2	3.8
Inventories	23.9	14.4
Deferred revenue	28.6	38.1
Pensions, post-retirement and other benefits	76.9	82.6
Tax credits	74.1	81.9
Net operating loss carryforwards (NOL's)	160.0	125.9
Capital loss carryforwards	2.6	2.6
State deferred taxes	19.8	17.4
Other	0.0	0.8
Deferred Tax Assets, Gross	469.4	434.6
Valuation allowances	(175.4)	(105.6)
Net deferred tax assets	294.0	329.0
Deferred tax liabilities
Property, plant and equipment, net	3.5	1.2
Goodwill and intangible assets	245.9	302.8
Undistributed earnings	20.6	16.0
Other	1.7	2.3
Net deferred tax liabilities	271.7	322.3
Net deferred tax asset	$ 22.3	$ 6.7