Revenue and Contract Balances - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Total revenue	$ 581	$ 496	$ 1,682	$ 1,471
Residential
Disaggregation of Revenue [Line Items]
Total revenue	405	362	1,207	1,103
Rentals
Disaggregation of Revenue [Line Items]
Total revenue	123	99	337	264
Mortgages
Disaggregation of Revenue [Line Items]
Total revenue	39	24	104	74
Other
Disaggregation of Revenue [Line Items]
Total revenue	$ 14	$ 11	$ 34	$ 30