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Acquisitions and Dispositions - Ondot Purchase Price Allocation (Details) - USD ($)
$ in Millions
Jan. 22, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]        
Goodwill   $ 36,433 $ 36,322 $ 36,038
Ondot        
Business Acquisition [Line Items]        
Cash and cash equivalents $ 13      
Trade accounts receivable 9      
Finite-lived intangible assets 142      
Goodwill 173      
Payables and other liabilities (31)      
Net assets acquired 306      
Less: Fair value of previously held equity interest (22)      
Total purchase price $ 284