CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash provided (required) by operating activities
Net income (loss)	$ 5.2	$ (50.5)
Net loss from discontinued operations	0.0	34.7
Adjustments to reconcile income (loss) from continuing operations to cash provided (required) by operating activities
Depreciation and amortization	283.3	284.4
Loss from investment in Technip Energies	0.0	27.7
Income from equity affiliates, net of dividends received	(35.9)	(23.1)
Loss on early extinguishment of debt	0.0	29.8
Other non-cash items, net	32.1	79.9
Changes in operating assets and liabilities, net of effects of acquisitions
Trade receivables, net and Contract assets, net	(587.6)	(375.1)
Inventories, net	(112.9)	(27.4)
Accounts payable, trade	275.7	134.7
Contract liabilities	89.4	(242.7)
Income taxes payable, net	46.0	(19.0)
Other current assets and liabilities, net	42.7	(93.5)
Other non-current assets and liabilities, net	(46.1)	25.8
Cash required by operating activities	(8.1)	(214.3)
Cash provided (required) by investing activities
Capital expenditures	(153.7)	(94.3)
Proceeds from sales of assets	75.3	13.4
Proceeds from sale of investment in Technip Energies	0.0	288.5
Other investing activities	14.9	5.7
Cash provided (required) by investing activities	(63.5)	213.3
Cash required by financing activities
Net decrease in short-term debt	(38.2)	(204.7)
Cash settlement for derivative hedging debt	(30.1)	(64.4)
Net increase in revolving credit facility	0.0	150.0
Repayments of long-term debt	0.0	(451.7)
Share repurchases	(150.1)	(50.1)
Dividends paid	(21.8)	0.0
Other financing activities	(36.5)	(5.9)
Cash required by financing activities	(276.7)	(626.8)
Effect of changes in foreign exchange rates on cash and cash equivalents	(17.9)	11.9
Change in cash and cash equivalents	(366.2)	(615.9)
Cash and cash equivalents, beginning of period	1,057.1	1,327.4
Cash and cash equivalents, end of period	$ 690.9	$ 711.5