Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows (required) provided by operating activities:
Net income	$ 1.2	$ 17.4
Loss from discontinued operations, net	0.4	0.2
Income from continuing operations	1.6	17.6
Adjustments to reconcile income from continuing operations to cash provided by continuing operating activities:
Depreciation and amortization	13.7	12.2
Gain on disposal of assets	0.0	0.4
Stock-based compensation	2.4	1.8
Pension expense	0.7	0.1
Other	0.4	0.0
Changes in operating assets and liabilities:
Trade receivables - billed, net	26.5	26.8
Contract assets	(26.8)	(8.3)
Inventories	(1.4)	(22.8)
Accounts payable, trade and other	(0.1)	(2.6)
Advance and progress payments	1.6	20.5
Accrued pension and other postretirement benefits, net	(4.5)	(0.4)
Other assets and liabilities, net	(18.2)	(20.5)
Cash (required) provided by continuing operating activities	(4.1)	24.0
Cash required by discontinued operating activities	(0.6)	(0.2)
Cash (required) provided by operating activities	(4.7)	23.8
Cash flows required by investing activities:
Acquisitions, net of cash acquired	(18.8)	(61.0)
Capital expenditures	(10.4)	(7.9)
Proceeds from property available for sale	0.2	0.5
Cash required by investing activities	(29.0)	(68.4)
Cash flows provided by financing activities:
Net payments on short-term debt	(0.1)	(1.0)
Proceeds from short-term foreign credit facilities	0.0	1.0
Payments of short-term foreign credit facilities	(1.5)	(0.8)
Net proceeds (payments) from domestic credit facilities	34.7	(117.1)
Repayment of long-term debt	0.0	(0.5)
Proceeds from stock issuance, net of stock issuance costs	0.0	184.6
Settlement of taxes withheld on equity compensation awards	0.0	(9.5)
Dividends	(3.2)	(3.2)
Cash provided by financing activities	29.9	53.5
Effect of foreign exchange rate changes on cash and cash equivalents	0.4	0.8
(Decrease) increase in cash and cash equivalents	(3.4)	9.7
Cash and cash equivalents, beginning of period	34.0	33.2
Cash and cash equivalents, end of period	$ 30.6	$ 42.9