DERIVATIVE FINANCIAL INSTRUMENTS - Fair value of derivative instruments in balance sheets (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Derivatives, Fair Value
Derivative assets	$ 238.1		$ 238.1		$ 120.8
Derivative liabilities	395.0		395.0		176.5
Foreign exchange contracts | Cash Flow Hedging
Derivatives, Fair Value
Foreign exchange contracts	(43.9)	$ (0.2)	(63.7)	$ (20.4)
Derivatives Designated As Hedging Instruments | Foreign exchange contracts
Derivatives, Fair Value
Derivative assets	228.2		228.2		116.9
Derivative liabilities	345.2		345.2		155.0
Derivatives Designated As Hedging Instruments | Foreign exchange contracts | Current - Derivative financial instruments
Derivatives, Fair Value
Derivative assets	203.5		203.5		106.4
Derivative liabilities	292.2		292.2		139.5
Derivatives Designated As Hedging Instruments | Foreign exchange contracts | Long-term - Derivative financial instruments
Derivatives, Fair Value
Derivative assets	24.7		24.7		10.5
Derivative liabilities	53.0		53.0		15.5
Derivatives Not Designated As Hedging Instruments | Foreign exchange contracts
Derivatives, Fair Value
Derivative assets	9.9		9.9		3.9
Derivative liabilities	49.8		49.8		21.5
Derivatives Not Designated As Hedging Instruments | Foreign exchange contracts | Current - Derivative financial instruments
Derivatives, Fair Value
Derivative assets	9.9		9.9		3.9
Derivative liabilities	$ 49.8		$ 49.8		$ 21.5