PROPERTY AND EQUIPMENT - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 138	$ 322	$ 346
Property and equipment, net	1,503	1,514
International Operations
Property, Plant and Equipment [Line Items]
Property and equipment, net	623	679
Reimbursed Expenses
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 49	$ 109	$ 121
Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	40 years