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GOODWILL AND INTANGIBLE ASSETS - Finite and Indefinite-lived Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 1,865 $ 2,574
Accumulated Amortization (1,420) (2,108)
Net Amount 445 466
Indefinite-lived Intangible Assets [Line Items]    
Gross Amount 1,929 3,145
Accumulated Amortization (1,420) (2,108)
Net Amount 509 1,037
Trademarks and other    
Indefinite-lived Intangible Assets [Line Items]    
Net Amount 64 571
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 945 1,558
Accumulated Amortization (699) (1,285)
Net Amount 246 273
Indefinite-lived Intangible Assets [Line Items]    
Accumulated Amortization (699) (1,285)
Patents and trademarks    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 232 301
Accumulated Amortization (182) (222)
Net Amount 50 79
Indefinite-lived Intangible Assets [Line Items]    
Accumulated Amortization (182) (222)
Monitoring lines    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 0 71
Accumulated Amortization 0 (59)
Net Amount 0 12
Indefinite-lived Intangible Assets [Line Items]    
Accumulated Amortization 0 (59)
Service portfolios and other    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 688 644
Accumulated Amortization (539) (542)
Net Amount 149 102
Indefinite-lived Intangible Assets [Line Items]    
Accumulated Amortization $ (539) $ (542)