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Discontinued Operations and Disposal Groups Narrative (Details) - IH - USD ($)
$ in Millions
May 06, 2024
Apr. 03, 2023
Feb. 20, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Reorganization Value     $ 15,500    
Proceeds from Divestiture of Businesses   $ 1,900      
Deposits with Parent Company       $ 1,600 $ 2,100
Subsequent Event          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Proceeds from Divestiture of Businesses $ 10,100        
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax $ 4,700