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Goodwill, Customer Relationships and Other Intangible Assets - Additional Information (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
segment
reportingUnit
Sep. 30, 2021
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]        
Intangible assets, gross (including goodwill) | $ $ 29,900   $ 29,900  
Number of reportable segments | segment     2  
Number of operating segments | segment     2  
Number of reporting units | reportingUnit     4  
Amortization of intangible assets | $ $ 279 $ 306 $ 830 $ 1,000