Segment Information - Financial Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Service related, net	$ 1,067	$ 379	$ 829
Net gain on mortgage loans held for sale	2,251	2,310	1,098
Total revenues	3,318	2,689	1,927
Total expenses	1,662	1,782	1,714
Other Nonoperating Income (Expense) [Abstract]
Interest income	231	158	291
Interest expense	(478)	(528)	(543)
Other income (expenses), net	528	(135)	15
Total other income (expenses), net	281	(505)	(237)
Income (loss) from continuing operations before income tax expense (benefit)	1,937	402	(24)
Depreciation and amortization for property and equipment and intangible assets	57	73	90
Total assets	14,204	24,165	18,305
Assets of discontinued operations	0	5,347
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Title Business
Other Nonoperating Income (Expense) [Abstract]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	487
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Valuations Business
Other Nonoperating Income (Expense) [Abstract]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	7
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Field Services Business
Other Nonoperating Income (Expense) [Abstract]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	34
Discontinued Operations, Held-for-sale or Disposed of by Sale | Champion Mortgage
Other Nonoperating Income (Expense) [Abstract]
Assets of discontinued operations		5,347
Operating Segments | Servicing
Revenues:
Service related, net	705	(159)	328
Net gain on mortgage loans held for sale	568	222	124
Total revenues	1,273	63	452
Total expenses	502	491	554
Other Nonoperating Income (Expense) [Abstract]
Interest income	129	61	186
Interest expense	(262)	(268)	(233)
Other income (expenses), net	0	0	4
Total other income (expenses), net	(133)	(207)	(43)
Income (loss) from continuing operations before income tax expense (benefit)	638	(635)	(145)
Depreciation and amortization for property and equipment and intangible assets	32	20	19
Total assets	8,733	16,173	11,743
Operating Segments | Originations
Revenues:
Service related, net	176	105	80
Net gain on mortgage loans held for sale	1,683	2,088	963
Total revenues	1,859	2,193	1,043
Total expenses	852	746	568
Other Nonoperating Income (Expense) [Abstract]
Interest income	102	95	98
Interest expense	(88)	(78)	(98)
Other income (expenses), net	0	0	4
Total other income (expenses), net	14	17	4
Income (loss) from continuing operations before income tax expense (benefit)	1,021	1,464	479
Depreciation and amortization for property and equipment and intangible assets	24	18	18
Total assets	3,143	5,447	4,313
Corporate/ Other
Revenues:
Service related, net	186	433	421
Net gain on mortgage loans held for sale	0	0	11
Total revenues	186	433	432
Total expenses	308	545	592
Other Nonoperating Income (Expense) [Abstract]
Interest income	0	2	7
Interest expense	(128)	(182)	(212)
Other income (expenses), net	528	(135)	7
Total other income (expenses), net	400	(315)	(198)
Income (loss) from continuing operations before income tax expense (benefit)	278	(427)	(358)
Depreciation and amortization for property and equipment and intangible assets	1	35	53
Total assets	$ 2,328	$ 2,545	$ 2,249