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CONTRACT ASSETS AND CONTRACT LIABILITIES - Change in Carrying Amount of Contract Assets and Contract Liabilities (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Contract Assets    
Balance at beginning of year $ 545 $ 544
Acquisitions 28 0
Recognized in current year 284 370
Reclassified to accounts receivable (225) (364)
Foreign currency impact (20) (5)
Balance at end of period 612 545
Contract Liabilities    
Balance at beginning of year 824 832
Acquisitions 12 2
Recognized in current year 453 339
Amounts in beginning balance reclassified to revenue (277) (317)
Current year amounts reclassified to revenue (169) (63)
Foreign currency impact (17) (7)
Balance at end of period $ 826 $ 786