FAIR VALUE MEASUREMENTS - Assets and liabilities measured on a recurring basis (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Assets, Fair Value Disclosure [Abstract]
Investment in Technip Energies	$ 315.3	$ 292.4
Equity securities	0.0	317.3
Foreign exchange contracts	119.8	42.2
Liabilities, Fair Value Disclosure [Abstract]
Foreign exchange contracts	369.6	97.9
Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Investment in Technip Energies	0.0	317.3
Equity securities	18.7	25.0
Held-to-maturity debt securities	15.0	24.0
Total assets	355.4	489.8
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities	569.8	176.5
Fair Value, Measurements, Recurring \| Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Foreign exchange contracts	320.0	120.8
Liabilities, Fair Value Disclosure [Abstract]
Foreign exchange contracts	569.8	176.5
Fair Value, Measurements, Recurring \| Nonqualified Plan
Assets, Fair Value Disclosure [Abstract]
Money market and stable value funds	1.7	2.7
Fair Value, Measurements, Recurring \| Level 1
Assets, Fair Value Disclosure [Abstract]
Investment in Technip Energies	0.0	317.3
Equity securities	18.7	25.0
Held-to-maturity debt securities	0.0	0.0
Total assets	18.7	342.3
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities	0.0	0.0
Fair Value, Measurements, Recurring \| Level 1 \| Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Foreign exchange contracts	0.0	0.0
Liabilities, Fair Value Disclosure [Abstract]
Foreign exchange contracts	0.0	0.0
Fair Value, Measurements, Recurring \| Level 1 \| Nonqualified Plan
Assets, Fair Value Disclosure [Abstract]
Money market and stable value funds	0.0	0.0
Fair Value, Measurements, Recurring \| Level 2
Assets, Fair Value Disclosure [Abstract]
Investment in Technip Energies	0.0	0.0
Equity securities	0.0	0.0
Held-to-maturity debt securities	15.0	24.0
Total assets	336.5	147.2
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities	569.8	176.5
Fair Value, Measurements, Recurring \| Level 2 \| Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Foreign exchange contracts	320.0	120.8
Liabilities, Fair Value Disclosure [Abstract]
Foreign exchange contracts	569.8	176.5
Fair Value, Measurements, Recurring \| Level 2 \| Nonqualified Plan
Assets, Fair Value Disclosure [Abstract]
Money market and stable value funds	1.5	2.4
Fair Value, Measurements, Recurring \| Level 3
Assets, Fair Value Disclosure [Abstract]
Investment in Technip Energies	0.0	0.0
Equity securities	0.0	0.0
Held-to-maturity debt securities	0.0	0.0
Total assets	0.0	0.0
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities	0.0	0.0
Fair Value, Measurements, Recurring \| Level 3 \| Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Foreign exchange contracts	0.0	0.0
Liabilities, Fair Value Disclosure [Abstract]
Foreign exchange contracts	0.0	0.0
Fair Value, Measurements, Recurring \| Level 3 \| Nonqualified Plan
Assets, Fair Value Disclosure [Abstract]
Money market and stable value funds	$ 0.0	$ 0.0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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