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Acquisitions - Virtus Acquisition Narrative (Details) - USD ($)
$ in Millions
Jan. 02, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition        
Goodwill   $ 53,330 $ 53,268 $ 52,242
Virtus Partners        
Business Acquisition        
Noncontrolling interest, ownership percentage by noncontrolling owners 30.00%      
Virtus Partners        
Business Acquisition        
Percentage of equity interests acquired 70.00%      
Cash purchase price $ 404      
Fair value of redeemable noncontrolling interest 173      
Goodwill $ 253      
Call option exercise period 2 years      
Put option exercise period 3 years      
Virtus Partners | Customer relationships        
Business Acquisition        
Identifiable finite lived intangibles assets acquired $ 254      
Virtus Partners | Software        
Business Acquisition        
Identifiable finite lived intangibles assets acquired $ 51