RESTRUCTURING (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, completion period			18 months
Restructuring costs and asset impairment charges	$ 9,023	$ 0	$ 27,101	$ 0
2021 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring costs and asset impairment charges	9,023		27,101
2021 Restructuring Program | Impairment of Operating Lease Right of Use Assets and Property and Equipment
Restructuring Cost and Reserve [Line Items]
Total charges incurred	130,400		130,400
Restructuring costs and asset impairment charges			6,500
2021 Restructuring Program | Impairment Of Operating Lease Right Of Use Assets
Restructuring Cost and Reserve [Line Items]
Restructuring costs and asset impairment charges			3,400
2021 Restructuring Program | Impairment of Property and Equipment
Restructuring Cost and Reserve [Line Items]
Restructuring costs and asset impairment charges			3,100
2021 Restructuring Program | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	174,000		174,000
2021 Restructuring Program | Minimum | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	87,000		87,000
2021 Restructuring Program | Minimum | Impairment of Right-of-use and Other Assets
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	40,000		40,000
2021 Restructuring Program | Minimum | Contract Termination
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	20,000		20,000
2021 Restructuring Program | Minimum | Impairment Of Intangible Assets
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	27,000		27,000
2021 Restructuring Program | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	240,000		240,000
2021 Restructuring Program | Maximum | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	90,000		90,000
2021 Restructuring Program | Maximum | Impairment of Right-of-use and Other Assets
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	75,000		75,000
2021 Restructuring Program | Maximum | Contract Termination
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	35,000		35,000
2021 Restructuring Program | Maximum | Impairment Of Intangible Assets
Restructuring Cost and Reserve [Line Items]
Restructuring and related activities, expected cost	$ 40,000		$ 40,000