Income Taxes Income Taxes - Deferred Taxes By Balance Sheet Account (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Accrued expenses	$ 43.0	$ 74.5
Deferred income taxes - assets	293.8	309.5
Deferred income taxes - liabilities	(287.1)	(300.6)
Net deferred tax asset	6.7	8.9
Warranty accrual	13.5	19.7
Deferred compensation	10.6	16.2
Allowances for doubtful accounts	3.8	10.3
Inventories	14.4	26.1
Deferred revenue	38.1	19.1
Pensions, post-retirement and other benefits	82.6	92.3
Tax credits	81.9	52.1
Net operating loss carryforwards	125.9	88.4
Capital loss carryforwards	2.6	1.8
State deferred taxes	17.4	17.1
Other	0.8	0.5
Deferred Tax Assets, Gross	434.6	418.1
Valuation allowance	105.6	87.8
Net deferred tax assets	329.0	330.3
Deferred tax liabilities
Property, plant and equipment, net	1.2	39.7
Goodwill and intangible assets	302.8	271.5
Partnership interest	0.0	3.7
Undistributed earnings	16.0	6.5
Other	2.3	0.0
Net deferred tax liabilities	$ 322.3	$ 321.4