Fair Value of Financial Information - Additional Information (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Secured seller promissory note from the sale of the Homeowner Services Group	$ 795	$ 795
Long-term restricted funds	25	15
Other Current Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other investments	75	71
Other Long-term Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other investments	30	44
Carrying Amount
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Secured seller promissory note from the sale of the Homeowner Services Group	795	795
Disposal Group, Disposed of by Sale \| Homeowner Services Group \| Level 3 \| Fair Value
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Secured seller promissory note from the sale of the Homeowner Services Group	$ 797	$ 793