Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net income	$ 17.9	$ 46.9	$ 22.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	20.1	20.8	21.4
Amortization	10.1	6.1	4.8
Provision for credit losses	1.4	0.9	1.2
Provision for warranties	10.9	9.8	9.8
Deferred compensation expense	0.5	0.7	0.6
Share-based compensation	6.0	5.1	2.6
Deferred tax (benefit) provision	(1.3)	8.6	1.7
(Gain) loss on disposition of property and equipment	(0.6)	(6.2)	0.3
Non-cash curtailment and settlement loss (gain) on pension and postretirement benefits, net	3.2	(0.5)	0.0
Gain on disposition of subsidiary	0.0	(1.6)	0.0
Asset impairment charges, net	0.2	4.4	0.3
Distributions to deferred compensation programs participants	(2.5)	(1.4)	(2.2)
Change in operating assets and liabilities, excluding the effects of acquisitions:
(Purchase) sale of trading securities, net	(3.1)	0.2	(0.9)
Receivables and other contract assets	(30.8)	12.2	7.5
Inventories	(53.8)	44.7	61.3
Prepaid expenses	(6.2)	0.0	(2.3)
Other assets	1.5	(0.2)	0.2
Accounts payable	30.8	(8.6)	(13.0)
Accrued retirement benefit costs	(0.1)	0.0	(1.3)
Accrued loss reserves	(1.3)	0.3	(1.1)
Accrued payroll and related expenses	3.0	(5.1)	0.7
Other accrued liabilities	(0.7)	9.8	1.3
Accrued product warranty	(10.7)	(10.2)	(10.5)
Customer deposits	26.5	(11.2)	(5.3)
Income taxes payable/prepaid	(13.6)	16.0	12.2
Other	0.0	0.0	1.1
Net cash provided by operating activities	7.4	141.5	112.6
Cash flows from investing activities:
Acquisitions, net of cash acquired	0.1	(32.5)	0.0
(Price adjustment on prior) proceeds from sale of subsidiary	(1.1)	9.1	0.0
Expenditures for property and equipment	(20.1)	(15.4)	(23.4)
Proceeds from sale of property and equipment	1.9	17.7	0.5
Purchase of investments	(1.0)	(1.1)	(0.6)
Sale of investments	1.8	1.3	1.9
Net cash used in investing activities	(18.4)	(20.9)	(21.6)
Cash flows from financing activities:
Payment of dividends	(10.2)	(10.0)	(10.0)
Borrowings under bank loans	7.2	6.0	166.0
Repayments of bank loans	(6.2)	(5.9)	(224.0)
Sale of Company stock by deferred compensation programs, net	0.6	0.3	0.3
Withholding tax paid upon vesting of share-based compensation awards	(3.5)	(0.8)	(0.4)
Net cash used in financing activities	(12.1)	(10.4)	(68.1)
Effect of exchange rates on cash	(1.1)	(0.5)	0.2
(Decrease) increase in cash and cash equivalents and restricted cash	(24.2)	109.7	23.1
Cash and cash equivalents and restricted cash, beginning of period	158.6	48.9	25.8
Cash and cash equivalents and restricted cash, end of period	134.4	158.6	48.9
Cash paid during the year for:
Interest, net of capitalized interest	0.3	0.3	1.8
Income taxes paid (refunded), net	10.0	(20.2)	(11.3)
Supplemental disclosures of non-cash items
Capital expenditures in accounts payable	1.4	0.7	2.0
Additions to right-of-use assets and lease liabilities	1.8	1.5	3.2
Liability award converted to equity	$ 0.0	$ 0.8	$ 0.0