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GOODWILL | 12 Months Ended
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Dec. 31, 2021
GOODWILL. |
GOODWILL | 8.GOODWILL The changes in the carrying amount of goodwill for the years ended December 31, 2020 and 2021 were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Legacy Huazhu |  | Legacy DH |  | Total
Balance at January 1, 2020 |  | ​ |  | ​ |  | ​
Goodwill |  | 2,661 |  | — |  | 2,661
Accumulated impairment loss |  | (4) |  | — |  | (4)
​ |  | 2,657 |  | — |  | 2,657
Goodwill acquired during the year (Note 3) | ​ | 3 | ​ | 2,694 | ​ | 2,697
Impairment loss | ​ | — | ​ | (437) | ​ | (437)
Net foreign exchange-goodwill |  | — |  | 74 |  | 74
Net foreign exchange-impairment loss |  | — |  | (3) |  | (3)
Balance at December 31, 2020 | ​ | ​ | ​ | ​ | ​ | ​
Goodwill | ​ | 2,664 | ​ | 2,768 | ​ | 5,432
Accumulated impairment loss |  | (4) |  | (440) |  | (444)
​ | ​ | 2,660 | ​ | 2,328 | ​ | 4,988
Goodwill acquired during the year (Note 3) | ​ | 372 | ​ | 6 | ​ | 378
Net foreign exchange-goodwill | ​ | — | ​ | (278) | ​ | (278)
Net foreign exchange-impairment loss | ​ | — | ​ | 44 | ​ | 44
Balance at December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​
Goodwill | ​ | 3,036 | ​ | 2,496 | ​ | 5,532
Accumulated impairment loss | ​ | (4) | ​ | (396) | ​ | (400)
​ | ​ | 3,032 | ​ | 2,100 | ​ | 5,132
​

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- Definition The entire disclosure for goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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