DERIVATIVE FINANCIAL INSTRUMENTS - Fair value of derivative instruments in balance sheets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Derivatives, Fair Value
Derivative assets	$ 323.4		$ 120.8
Derivative liabilities	377.9		176.5
Foreign exchange contracts | Cash Flow Hedging
Derivatives, Fair Value
Foreign exchange contracts	(19.8)	$ (20.2)
Derivatives Designated As Hedging Instruments | Foreign exchange contracts
Derivatives, Fair Value
Derivative assets	294.2		116.9
Derivative liabilities	350.2		155.0
Derivatives Designated As Hedging Instruments | Foreign exchange contracts | Current - Derivative financial instruments
Derivatives, Fair Value
Derivative assets	150.5		106.4
Derivative liabilities	181.4		139.5
Derivatives Designated As Hedging Instruments | Foreign exchange contracts | Long-term - Derivative financial instruments
Derivatives, Fair Value
Derivative assets	143.7		10.5
Derivative liabilities	168.8		15.5
Derivatives Not Designated As Hedging Instruments | Foreign exchange contracts
Derivatives, Fair Value
Derivative assets	29.2		3.9
Derivative liabilities	27.7		21.5
Derivatives Not Designated As Hedging Instruments | Foreign exchange contracts | Current - Derivative financial instruments
Derivatives, Fair Value
Derivative assets	28.0		3.9
Derivative liabilities	27.7		21.5
Derivatives Not Designated As Hedging Instruments | Foreign exchange contracts | Long-term - Derivative financial instruments
Derivatives, Fair Value
Derivative assets	1.2		0.0
Derivative liabilities	$ 0.0		$ 0.0