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Acquisitions and Divestitures - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jan. 05, 2023
Dec. 31, 2023
Sep. 30, 2022
Dec. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Business Acquisition [Line Items]              
Acquisitions       $ 953   $ 110 $ 88
Goodwill   $ 26,751   $ 26,751 $ 26,751 $ 25,817 $ 27,038
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]     Other charges        
Disposal Group, Disposed of by Sale, Not Discontinued Operations | GIST              
Business Acquisition [Line Items]              
Consideration for sale of business     $ 184        
Proceeds from divestiture of businesses     75        
Net proceeds     109        
Loss on sale of business     21        
After tax benefit from loss on sale of business     $ 3        
nexAir, LLC              
Business Acquisition [Line Items]              
Acquisitions $ 811            
Ownership interest in acquiree before acquisition (percent) 23.00%            
Ownership interest acquired (percent) 77.00%            
Purchase price $ 866            
Fair value of previously held equity interest $ 183            
Ownership interest in acquiree after acquisition (percent) 100.00%            
Pro forma sales since acquisition date   $ 408          
Measurement period adjustments related to working capital and deferred taxes         $ 27    
Identifiable intangible assets $ 245            
Goodwill 485            
nexAir, LLC | Customer Relationships              
Business Acquisition [Line Items]              
Identifiable intangible assets $ 245            
Estimated useful life of acquired intangible assets 20 years