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EQUITY - Summary of Changes in AOCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance as of beginning of period $ 6,578 $ 14,435 $ 14,269
Balance as of end of period 7,094 6,578 14,435
Accumulated Other Comprehensive Income (Loss)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance as of beginning of period (745) (1,253) (1,215)
Other comprehensive income (loss) before reclassifications, net (269) 591 (57)
Amounts reclassified, pre-tax 42 (105) 13
Tax benefit reclassified (17) 22 15
ASU 2018-02 adoption impact   (9)  
Balance as of end of period (989) (745) (1,253)
Foreign Currency Translation      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance as of beginning of period (191) (780) (834)
Other comprehensive income (loss) before reclassifications, net (322) 589 52
Amounts reclassified, pre-tax 8   2
Balance as of end of period (505) (191) (780)
Defined Benefit Pension and Post-retirement Plans      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance as of beginning of period (554) (473) (381)
Other comprehensive income (loss) before reclassifications, net 53 2 (109)
Amounts reclassified, pre-tax 34 (105) 11
Tax benefit reclassified (17) 22 15
ASU 2018-02 adoption impact   (9)  
Balance as of end of period $ (484) $ (554) $ (473)