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Accumulated Other Comprehensive Loss (AOCL) (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss $ (2,472)   $ (2,810)  
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax 156 $ (546)    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 182 30    
Tax cost related to unrealized currency translation adjustments other than translation of foreign denominated balance sheets 85 96    
Pension and other postretirement benefit adjustments, tax cost (47) 6    
Accumulated Translation Adjustment [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss (2,054) (2,515) (2,254) $ (1,988)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax 170 (537)    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 30 10    
Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss (419) (752) (557) (763)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax (14) (9)    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 152 20    
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest        
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss 1 1 1 1
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax 0 0    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0 0    
Accumulated Other Comprehensive Loss        
Accumulated Other Comprehensive Income Loss [Line Items]        
Accumulated other comprehensive loss $ (2,472) $ (3,266) $ (2,810) $ (2,750)