Unaudited Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues:
Service related, net	$ 395	$ 288	$ 1,610	$ 860
Net gain on mortgage loans held for sale	115	572	551	1,833
Total revenues	510	860	2,161	2,693
Expenses:
Salaries, wages and benefits	183	251	614	805
General and administrative	133	151	368	476
Total expenses	316	402	982	1,281
Interest income	83	66	169	163
Interest expense	(104)	(118)	(321)	(363)
Other (expense) income, net	(20)	8	197	494
Total other (expense) income, net	(41)	(44)	45	294
Income from continuing operations before income tax expense	153	414	1,224	1,706
Less: Income tax expense	40	104	302	410
Net income from continuing operations	113	310	922	1,296
Net (loss) income from discontinued operations	0	(11)	0	3
Net income	113	299	922	1,299
Less: Undistributed earnings attributable to participating stockholders	0	1	0	9
Less: Premium on retirement of preferred stock	0	28	0	28
Net income attributable to common stockholders	$ 113	$ 270	$ 922	$ 1,262
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share	$ 1.59	$ 3.56	$ 12.71	$ 14.85
Income (Loss) from Continuing Operations, Per Diluted Share	1.55	3.42	12.37	14.20
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	0	(0.14)	0	0.04
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	0	(0.13)	0	0.03
Basic (in dollars per share)	1.59	3.42	12.71	14.89
Diluted (in dollars per share)	$ 1.55	$ 3.29	$ 12.37	$ 14.23