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STOCKHOLDERS' EQUITY Part 2 AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Cumulative Translation Adjustment $ (279)   $ (279)   $ (264) $ (309)
Change in cumulative translation adjustment (20) $ 23 (15) $ 40 45  
Benefit Plans Unrecognized Prior Service Credits 85   85   106 106
Change in Benefit Plans Unrecognized Prior Service Credits     (21)   0  
Unrealized Gains (Losses) on Derivative Instruments (48)   (48)   (55) (41)
Change in Unrealized Gains (Losses) on Derivative Instruments     7   (14)  
Unrealized Losses on Investments (1)   (1)   (1) (1)
Change in Unrealized Losses on Investments     0   0  
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax         31  
Accumulated Other Comprehensive Income (Loss), Net of Tax (243)   (243)   (214) $ (245)
Total other comprehensive income (loss), net of tax $ (34) $ 32 $ (29) $ 22    
Accounting Standards Update 2018-02 [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle         29  
Accounting Standards Update 2018-02 [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle         $ (9)