Consolidated Statements of Cash Flows € in Millions, $ in Millions		3 Months Ended						12 Months Ended
		Dec. 31, 2018 USD ($)	Mar. 31, 2018 USD ($)		Dec. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)		Dec. 31, 2018 USD ($)		Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)		Dec. 31, 2016 USD ($)
OPERATING ACTIVITIES
Net income								$ 90.0			$ 29.5		$ 24.7
Less: Income from discontinued operations		$ 29.7	$ 1.6		$ (0.8)	$ (1.0)		34.4			1.8		11.2
Net income from continuing operations								55.6			27.7		13.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization								50.8			37.6		33.1
Asset impairments								0.0			0.0		1.2
Interest accretion of convertible notes discount								9.1			12.8		12.5
Loss on extinguishment of debt								0.0			4.9		0.0
Financing costs amortization								1.3			1.3		1.3
Employee share-based compensation expense								4.9			10.6		10.1
Unrealized foreign currency transaction (gain) loss								(2.2)			0.3		0.5
Deferred income tax benefit								5.0			(31.4)		15.0
Other non-cash operating activities								(2.5)			2.3		1.3
Changes in assets and liabilities, net of acquisitions:
Accounts receivable								25.5		$ 1.6	(32.8)		35.8
Inventory								(14.1)			(22.0)		21.7
Unbilled contract revenues and other assets								(9.1)			3.5		(11.6)
Accounts payable and other liabilities								(10.2)			13.6		29.9
Customer advances and billings in excess of contract revenue								4.9		28.2	15.9		5.0
Net Cash Provided By Operating Activities								119.0			44.3		169.3
INVESTING ACTIVITIES
Acquisition of businesses, net of cash acquired								(225.8)			(446.1)		(1.4)
Capital expenditures								(35.6)			(33.0)		(16.7)
Government grants								0.8			0.4		1.1
Proceeds from sale of assets								0.0			0.9		0.0
Net Cash Used In Investing Activities								(260.6)			(477.8)		(17.0)
FINANCING ACTIVITIES
Borrowings on revolving credit facilities								411.7			302.2		3.8
Repayments on revolving credit facilities								(316.8)			(66.1)		(6.1)
Repurchase of convertible notes								(57.1)			(194.9)		0.0
Proceeds from issuance of convertible notes								0.0			258.8		0.0
Proceeds from issuance of warrants								0.0			46.0		0.0
Payments for call options related to convertible notes								0.0			(59.5)		0.0
Borrowings on term loan								0.0			0.0		13.2
Repayments on term loan								(5.9)			(3.1)		(2.9)
Payments for debt issuance costs								(1.4)			(8.2)		0.0
Proceeds from exercise of stock options								10.8			2.0		0.4
Common stock repurchases								(2.7)			(2.0)		(0.7)
Dividend distribution to noncontrolling interests								(0.4)			0.0		0.0
Net Cash Provided By Financing Activities								38.2			275.2		7.7
DISCONTINUED OPERATIONS
Cash (Used In) Provided By Operating Activities								(30.2)			2.7		1.5
Cash Provided by (Used In) Investing Activities	[1]							132.7			(2.2)		(1.1)
Cash Provided By Discontinued Operations								102.5			0.5		0.4
Effect of exchange rate changes on cash and cash equivalents								(11.4)			7.2		(2.1)
Net (decrease) increase in cash, cash equivalents, restricted cash, and restricted cash equivalents								(12.3)			(150.6)		158.3
Cash, cash equivalents, restricted cash, and restricted cash equivalents at beginning of period			$ 131.4	[2]		$ 282.0	[2]	131.4	[2]		282.0	[2]	123.7
CASH, CASH EQUIVALENTS, RESTRICTED CASH, AND RESTRICTED CASH EQUIVALENTS AT END OF PERIOD	[2]	$ 119.1			$ 131.4			$ 119.1		$ 119.1	$ 131.4		$ 282.0

[1] Includes proceeds from the sale of CAIRE of $133.5 for the year ended December 31, 2018.

[2] Refer to Note 9, “Debt and Credit Arrangements,” and Note 12, “Business Combinations,” for further information regarding restricted cash and restricted cash equivalents balances.