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ACQUISITIONS - Summary of Fair Value of GE Transportation Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Feb. 25, 2019
--- | --- | --- | --- | ---
Assets acquired |  |  |  |
Goodwill | $ 8,587 | $ 8,485 | $ 8,361 |
General Electric Company |  |  |  |
Assets acquired |  |  |  |
Cash and cash equivalents |  |  |  | $ 177
Accounts receivable |  |  |  | 541
Inventories |  |  |  | 1,190
Other current assets |  |  |  | 71
Property, plant, and equipment |  |  |  | 1,089
Goodwill |  |  |  | 5,984
Other noncurrent assets |  |  |  | 321
Total assets acquired |  |  |  | 12,608
Liabilities assumed |  |  |  |
Current liabilities |  |  |  | 1,594
Contingent consideration |  |  |  | 440
Other noncurrent liabilities |  |  |  | 667
Total liabilities assumed |  |  |  | 2,701
Net assets acquired |  |  |  | 9,907
Noncontrolling interest |  |  |  | 88
General Electric Company | Trade names |  |  |  |
Assets acquired |  |  |  |
Acquired intangible assets |  |  |  | 55
General Electric Company | Customer relationships |  |  |  |
Assets acquired |  |  |  |
Acquired intangible assets |  |  |  | 550
General Electric Company | Intellectual property |  |  |  |
Assets acquired |  |  |  |
Acquired intangible assets |  |  |  | 1,180
General Electric Company | Backlog |  |  |  |
Assets acquired |  |  |  |
Acquired intangible assets |  |  |  | $ 1,450

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