Condensed Consolidated Statements of Cash Flows (Statement) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Cash Flows [Abstract]
Net income	$ 25.6	$ 25.6
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	23.9	19.9
Stock-based compensation	2.6	1.7
Other	4.9	1.7
Trade receivables, net and contract assets	4.4	(6.5)
Inventories	(30.9)	(47.2)
Accounts payable, trade and other	(21.5)	27.2
Advance and progress payments	27.0	28.4
Accrued pension and other postretirement benefits, net	(0.3)	(2.0)
Other assets and liabilities, net	(14.1)	(9.7)
Cash provided by operating activities	21.6	39.1
Acquisitions, net of cash acquired	(1.1)	(0.4)
Capital expenditures	(17.9)	(26.7)
Proceeds from disposal of assets	0.1	0.1
Cash required by investing activities	(18.9)	(27.0)
Net proceeds on short-term debt	0.2	0.1
Net payments for domestic credit facilities	(25.9)	(4.5)
Payment, Tax Withholding, Share-based Payment Arrangement	(1.1)	0.0
Dividends	(3.2)	(3.2)
Cash required by financing activities	(30.0)	(7.6)
Effect of foreign exchange rate changes on cash and cash equivalents	(0.1)	0.9
(Decrease) increase in cash and cash equivalents	(27.4)	5.4
Cash and cash equivalents, beginning of period	73.1	78.8
Cash and cash equivalents, end of period	45.7	84.2
Supplemental Cash Flow Information:
Non-cash investing in capital expenditures, accrued but not paid	$ 10.3	$ 6.0