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Supplemental Cash Flow Information (Tables)
3 Months Ended
Mar. 31, 2024
Supplemental Cash Flow Information [Abstract]  
Schedule of Activities Resulting from Management of Proceeds The accompanying cash flows are included in cash flows from operating activities in the Condensed Consolidated Statements of Cash Flows along with the activities resulting from management of the proceeds, as follows:
($ in millions)Three months ended March 31,
20242023
Cash flows from operating activities
Net change in proceeds managed  
Net change in fixed income securities$(31)$111 
Net change in short-term investments(127)93 
Operating cash flow (used) provided$(158)$204 
Net change in liabilities  
Liabilities for collateral, beginning of period$(1,891)$(2,011)
Liabilities for collateral, end of period(2,049)(1,807)
Operating cash flow provided (used)$158 $(204)