FAIR VALUE MEASUREMENTS - Assets and liabilities measured on a recurring basis (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Assets, Fair Value Disclosure [Abstract]
Equity method investment	$ 292.2	$ 292.4
Equity securities	49.1	317.3
Foreign exchange contracts	160.5	42.2
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instruments	215.0	97.9
Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Equity method investment	49.1	317.3
Equity securities	23.2	25.0
Held-to-maturity debt securities	23.3	24.0
Assets held for sale	5.0	5.0
Total assets	426.5	494.8
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities	377.9	176.5
Fair Value, Measurements, Recurring \| Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Foreign exchange contracts	323.4	120.8
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instruments	377.9	176.5
Fair Value, Measurements, Recurring \| Nonqualified Plan
Assets, Fair Value Disclosure [Abstract]
Money market fund	2.2	2.4
Stable value fund	0.3	0.3
Fair Value, Measurements, Recurring \| Level 1
Assets, Fair Value Disclosure [Abstract]
Equity method investment	49.1	317.3
Equity securities	23.2	25.0
Held-to-maturity debt securities	0.0	0.0
Assets held for sale	0.0	0.0
Total assets	72.3	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]
Derivative financial instruments	0.0	0.0
Fair Value, Measurements, Recurring \| Level 1 \| Nonqualified Plan
Assets, Fair Value Disclosure [Abstract]
Money market fund	0.0	0.0
Stable value fund	0.0	0.0
Fair Value, Measurements, Recurring \| Level 2
Assets, Fair Value Disclosure [Abstract]
Equity method investment	0.0	0.0
Equity securities	0.0	0.0
Held-to-maturity debt securities	23.3	24.0
Assets held for sale	0.0	0.0
Total assets	348.9	147.2
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities	377.9	176.5
Fair Value, Measurements, Recurring \| Level 2 \| Foreign exchange contracts
Assets, Fair Value Disclosure [Abstract]
Foreign exchange contracts	323.4	120.8
Liabilities, Fair Value Disclosure [Abstract]
Derivative financial instruments	377.9	176.5
Fair Value, Measurements, Recurring \| Level 2 \| Nonqualified Plan
Assets, Fair Value Disclosure [Abstract]
Money market fund	2.2	2.4
Stable value fund	0.0	0.0
Fair Value, Measurements, Recurring \| Level 3
Assets, Fair Value Disclosure [Abstract]
Equity method investment	0.0	0.0
Equity securities	0.0	0.0
Held-to-maturity debt securities	0.0	0.0
Assets held for sale	5.0	5.0
Total assets	5.0	5.0
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]
Derivative financial instruments	0.0	0.0
Fair Value, Measurements, Recurring \| Level 3 \| Nonqualified Plan
Assets, Fair Value Disclosure [Abstract]
Money market fund	0.0	0.0
Stable value fund	$ 0.0	$ 0.0

Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.

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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 portion of assets classified as held for sale.

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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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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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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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