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Business and Basis of Presentation - Narrative (Details)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 01, 2023
USD ($)
Sep. 30, 2023
USD ($)
Company
Sep. 30, 2023
USD ($)
Company
Long-Lived Assets Held-for-sale [Line Items]      
Number of holding companies with outstanding public debt | Company   2 2
Sound Point Capital Management, LP [Member]      
Long-Lived Assets Held-for-sale [Line Items]      
Gain on sale of asset management subsidiaries $ 248    
Sound Point Agreement      
Long-Lived Assets Held-for-sale [Line Items]      
Assets held for sale   $ 4,700 $ 4,700
Liabilities held for sale   4,400 4,400
Disposal Group, Held-for-sale, Not Discontinued Operations      
Long-Lived Assets Held-for-sale [Line Items]      
Assets held for sale   28 28
Liabilities held for sale   $ 2 2
Disposal Group, Held-for-sale, Not Discontinued Operations | Sound Point Agreement      
Long-Lived Assets Held-for-sale [Line Items]      
Term to make new investments   2 years  
Transaction commitment, new and transitioned investments   $ 1,000  
Participation percentage 30.00%    
Expenses recognized   $ 14 $ 46