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Revenue (Narrative) (Details) - USD ($)
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Disaggregation of Revenue [Line Items]      
Home service plans, typical term 1 year    
Deferred customer acquisition costs $ 15,000,000   $ 14,000,000
Amortization of deferred customer acquisition costs 3,000,000 $ 2,000,000  
Impairment losses related to capitalized costs 0 0  
Deferred policy acquisition costs 7,000,000   5,000,000
Contract assets 0   $ 0
Revenue recognized, opening balance 33,000,000    
Maximum [Member]      
Disaggregation of Revenue [Line Items]      
Amortization of deferred policy acquisition costs $ 1,000,000 $ 1,000,000