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Insurance Premiums (Roll Forward Of Premiums Receivable) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Insurance Premiums [Abstract]    
Premiums Receivable, Beginning balance $ 146 $ 160
Premium Payments Received (17) (18)
Premiums from New Business Written 0 0
Adjustments, Changes in Expected Term of Policies 0 0
Adjustments, Accretion of Premiums Receivable Discount 4 [1] 4 [2]
Premiums Receivable, Ending balance $ 133 $ 146
[1] Recorded within premiums earned on the Company's consolidated statements of operations.
[2] Recorded within premiums earned on the Company's consolidated statements of operations.