Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash provided (required) by operating activities
Net income (loss) from continuing operations	$ 220.5	$ (3,462.5)
Adjustments to reconcile income (loss) from continuing operations to cash provided (required) by operating activities
Depreciation	219.0	222.3
Amortization	70.7	76.0
Impairments	20.9	3,244.7
Employee benefit plan and share-based compensation costs	22.5	36.3
Deferred income tax benefit, net	(39.0)	(5.8)
Income from investment in Technip Energies	(351.8)	0.0
Unrealized gains on derivative instruments and foreign exchange	(19.3)	(26.9)
(Income) loss from equity affiliates, net of dividends received	9.4	(46.5)
Loss on early extinguishment of debt	39.5	0.0
Other	(19.0)	(1.9)
Changes in operating assets and liabilities, net of effects of acquisitions
Trade receivables, net and contract assets	(320.0)	(45.3)
Inventories, net	165.9	(20.7)
Accounts payable, trade	78.0	(236.0)
Contract liabilities	(104.8)	(33.3)
Income taxes payable (receivable), net	178.9	(34.4)
Other current assets and liabilities, net	57.4	644.9
Other non-current assets and liabilities, net	2.7	(21.2)
Cash provided by operating activities from continuing operations	231.5	289.7
Cash provided (required) by operating activities from discontinued operations	66.3	(187.6)
Cash provided by operating activities	297.8	102.1
Cash provided (required) by investing activities
Capital expenditures	(131.2)	(227.3)
Proceeds from redemption of debt securities	27.4	3.9
Payment to acquire debt securities	(29.1)	(3.9)
Proceeds from sales of assets	95.7	23.0
Cash received from divestiture	0.0	2.5
Proceeds from sale of investment in Technip Energies	784.5	0.0
Proceeds from repayment of advances to joint venture	12.5	12.5
Other	0.0	(1.0)
Cash provided (required) by investing activities from continuing operations	759.8	(190.3)
Cash required by investing activities from discontinued operations	(4.5)	(22.1)
Cash provided (required) by investing activities	755.3	(212.4)
Cash provided (required) by financing activities
Net decrease in short-term debt	(31.3)	(2.0)
Net decrease in commercial paper	(974.3)	(251.3)
Proceeds from issuance of long-term debt	1,164.4	223.2
Repayments of long-term debt	(1,242.2)	(423.9)
Payments for debt issuance costs	(53.5)	0.0
Dividends paid	0.0	(59.2)
Acquisition of non-controlling interest	(48.6)	0.0
Payments related to taxes withheld on share-based compensation	(2.4)	(6.4)
Other	(1.4)	0.0
Cash required by financing activities from continuing operations	(1,189.3)	(519.6)
Cash required by financing activities from discontinued operations	(3,617.7)	(392.2)
Cash required by financing activities	(4,807.0)	(911.8)
Effect of changes in foreign exchange rates on cash and cash equivalents	(19.9)	75.9
Change in cash and cash equivalents	(3,773.8)	(946.2)
Cash and cash equivalents, beginning of period	4,807.8	5,190.2
Cash and cash equivalents, end of period	1,034.0	4,244.0
Cash and cash equivalents	1,034.0	968.4
Cash and cash equivalents attributable to discontinued operations	0.0	3,275.6
Total cash and cash equivalents in the statement of cash flows	$ 1,034.0	$ 4,244.0