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Revenue (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Disaggregation of Revenue [Line Items]          
Home service plans, typical term     1 year    
Deferred customer acquisition costs $ 15,000,000   $ 15,000,000   $ 14,000,000
Amortization of deferred customer acquisition costs 4,000,000 $ 3,000,000 7,000,000 $ 6,000,000  
Impairment losses related to capitalized costs     0 0  
Deferred policy acquisition costs 8,000,000   8,000,000   5,000,000
Contract assets 9,000,000   9,000,000   $ 0
Revenue recognized, opening balance     72,000,000    
Maximum [Member]          
Disaggregation of Revenue [Line Items]          
Amortization of deferred policy acquisition costs $ 1,000,000 $ 1,000,000 $ 1,000,000 $ 1,000,000