ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	$ 3,397,959	$ 3,263,340	$ 3,471,470	$ 3,003,010
Other comprehensive income/(loss)	28,906	(19,545)	(1,477)	3,691
Balance, end of period	3,554,629	3,300,018	3,554,629	3,300,018
Accumulated other comprehensive loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(69,423)	(72,085)	(39,040)	(95,321)
Balance, end of period	(40,517)	(91,630)	(40,517)	(91,630)
Foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(67,962)	(81,158)	(43,601)	(101,780)
Unrealized gain/ (loss) in fair value	39,596	(33,292)	8,305	(9,231)
Net loss reclassified into Loss on sale of business	0	23,931	0	23,931
Income tax (expense)/benefit	(8,822)	3,560	(1,892)	121
Other comprehensive income/(loss)	30,774	(5,801)	6,413	14,821
Balance, end of period	(37,188)	(86,959)	(37,188)	(86,959)
Cash flow hedging instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	1,479	10,920	7,819	8,306
Unrealized gain/ (loss) in fair value	1,592	(8,805)	(1,797)	7,028
Income tax (expense)/benefit	599	4,036	2,503	3,268
Other comprehensive income/(loss)	(1,994)	(13,744)	(8,334)	(11,130)
Net gain reclassified into Cost of revenues (exclusive of depreciation and amortization)	(4,185)	(8,764)	(9,040)	(21,248)
Net gain reclassified into Foreign exchange loss	0	(211)	0	(178)
Balance, end of period	(515)	(2,824)	(515)	(2,824)
Defined benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(2,940)	(1,847)	(3,258)	(1,847)
Net loss reclassified into Loss on sale of business	126	0	439	0
Income tax (expense)/benefit	0	0	5	0
Other comprehensive income/(loss)	126	0	444	0
Balance, end of period	$ (2,814)	$ (1,847)	$ (2,814)	$ (1,847)