Description of Business and Summary of Significant Accounting Policies - Revenue, Advertising, Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Capitalized Contract Cost [Line Items]
Capitalized contract cost, amortization	$ 0.2	$ 0.1
Advertising costs	$ 13.5	3.6	$ 2.2
Minimum
Capitalized Contract Cost [Line Items]
Term of home warranty contracts	90 days
Maximum
Capitalized Contract Cost [Line Items]
Term of home warranty contracts	3 years
Manufacturer covered warranty, extension term	25 years
Other Noncurrent Assets
Capitalized Contract Cost [Line Items]
Capitalized Contract Cost, net	$ 0.6	0.3
Prepaid Expenses and Other Current Assets
Capitalized Contract Cost [Line Items]
Capitalized Contract Cost, net	$ 0.3	$ 0.1