ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		$ 3,001,532			$ 3,001,532
Other comprehensive income/(loss)	$ 5,875	17,361	$ 9,793	$ (31,943)	23,236	$ (22,150)
Ending balance	3,262,761				3,262,761
Foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(88,553)	(101,780)	(83,299)	(52,747)	(101,780)	(52,747)
Foreign currency translation	7,761		22,977		24,061	(13,138)
Income tax benefit/ (expense)	(366)		(8,147)		(3,439)	(2,584)
Other comprehensive income/(loss)	7,395		14,830		20,622	(15,722)
Ending balance	(81,158)	(88,553)	(68,469)	(83,299)	(81,158)	(68,469)
Cash flow hedging instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	12,440	8,306	(4,808)	(3,417)	8,306	(3,417)
Income tax benefit/ (expense)	446		1,480		(768)	1,888
Other comprehensive income/(loss)	(1,520)		(5,037)		2,614	(6,428)
Unrealized gain/ (loss) in fair value	7,938		(11,048)		15,833	(57,605)
Net (gain)/ loss reclassified into Cost of revenues (exclusive of depreciation and amortization)	(9,904)		4,557		(12,484)	5,461
Net (gain)/ loss reclassified into Foreign exchange loss	0		(26)		33	43,828
Ending balance	10,920	12,440	(9,845)	(4,808)	10,920	(9,845)
Defined benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,847)	(1,847)	1,957	1,957	(1,847)	1,957
Ending balance	(1,847)	(1,847)	1,957	1,957	(1,847)	1,957
Accumulated other comprehensive loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income/(loss)	5,875	$ 17,361	9,793	$ (31,943)
Ending balance	$ (72,085)		$ (76,357)		$ (72,085)	$ (76,357)