GOVERNMENT GRANTS AND OTHER ASSISTANCE (Notes)	3 Months Ended
Mar. 31, 2021
Unusual or Infrequent Items, or Both [Abstract]
GOVERNMENT GRANTS AND OTHER ASSISTANCE	GOVERNMENT GRANTS AND OTHER ASSISTANCECertain governments have passed or are considering modifying legislation to help businesses during the COVID-19 pandemic through loans, wage subsidies, tax relief or other financial aid, and some of these governments have extended or are considering extending these programs. During the three months ended March 31, 2021, the Company participated in several of these programs and recognized government grants and other assistance benefits of $4 million. The government grants and other assistance is recorded principally as a reduction of "Personnel" expense in the Unaudited Consolidated Statement of Operations. At both March 31, 2021 and December 31, 2020, the Company had a receivable of $28 million, which is included in "Other current assets" in the Consolidated Balance Sheets, for payments expected to be received for the programs where it has met the qualifying requirements and it is probable that payment will be received. In addition, certain governments have extended support for the travel and tourism industry through special programs whereby discounts are extended to travelers through travel service providers or through travel agents for reservations facilitated by them. The Company has participated in Japan's Go To Travel program and Thailand's We Travel Together program.

GOVERNMENT GRANTS AND OTHER ASSISTANCE (Notes)

3 Months Ended

Mar. 31, 2021

Unusual or Infrequent Items, or Both [Abstract]

GOVERNMENT GRANTS AND OTHER ASSISTANCECertain governments have passed or are considering modifying legislation to help businesses during the COVID-19 pandemic through loans, wage subsidies, tax relief or other financial aid, and some of these governments have extended or are considering extending these programs. During the three months ended March 31, 2021, the Company participated in several of these programs and recognized government grants and other assistance benefits of $4 million. The government grants and other assistance is recorded principally as a reduction of "Personnel" expense in the Unaudited Consolidated Statement of Operations. At both March 31, 2021 and December 31, 2020, the Company had a receivable of $28 million, which is included in "Other current assets" in the Consolidated Balance Sheets, for payments expected to be received for the programs where it has met the qualifying requirements and it is probable that payment will be received. In addition, certain governments have extended support for the travel and tourism industry through special programs whereby discounts are extended to travelers through travel service providers or through travel agents for reservations facilitated by them. The Company has participated in Japan's Go To Travel program and Thailand's We Travel Together program.