GOVERNMENT GRANTS AND OTHER ASSISTANCE	12 Months Ended
Dec. 31, 2020
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. The Company has participated in several of these programs, including the Netherlands' wage subsidy program and the United Kingdom's job retention scheme. In addition, in certain countries, such as Singapore and China, the Company also participated in programs where the government assistance is in the form of wage subsidies and reductions in wage-related employer taxes paid by the Company. During the year ended December 31, 2020, the Company recognized government grants and other assistance benefits of $127 million. The government grants and other assistance is recorded principally as a reduction of "Personnel" expense in the Consolidated Statement of Operations. At December 31, 2020, the Company has received $99 million and recorded a receivable of $28 million, which is included in “Other current assets” in the Consolidated Balance Sheet, 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. This receivable is expected to be received in 2021. 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

12 Months Ended

Dec. 31, 2020

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. The Company has participated in several of these programs, including the Netherlands' wage subsidy program and the United Kingdom's job retention scheme. In addition, in certain countries, such as Singapore and China, the Company also participated in programs where the government assistance is in the form of wage subsidies and reductions in wage-related employer taxes paid by the Company. During the year ended December 31, 2020, the Company recognized government grants and other assistance benefits of $127 million. The government grants and other assistance is recorded principally as a reduction of "Personnel" expense in the Consolidated Statement of Operations. At December 31, 2020, the Company has received $99 million and recorded a receivable of $28 million, which is included in “Other current assets” in the Consolidated Balance Sheet, 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. This receivable is expected to be received in 2021. 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.