Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Service related, net	$ 1,440	$ 1,865	$ 1,067
Net gain on mortgage loans held for sale	354	599	2,251
Total revenues	1,794	2,464	3,318
Expenses:
Salaries, wages and benefits	634	789	1,036
General and administrative	538	485	626
Total expenses	1,172	1,274	1,662
Interest income	528	261	231
Interest expense	(537)	(424)	(478)
Other income (expense), net	41	187	528
Total other income (expenses), net	32	24	281
Income from continuing operations before income tax expense	654	1,214	1,937
Less: Income tax expense	154	291	471
Net income from continuing operations	500	923	1,466
Net loss from discontinued operations	0	0	(12)
Net income	500	923	1,454
Less: Undistributed earnings attributable to participating stockholders	0	0	8
Less: Premium on retirement of preferred stock	0	0	28
Net income attributable to common stockholders	$ 500	$ 923	$ 1,418
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share	$ 7.46	$ 12.84	$ 17.39
Income (Loss) from Continuing Operations, Per Diluted Share	7.30	12.50	16.67
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	0	0	(0.15)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	0	0	(0.14)
Earnings Per Share, Basic	7.46	12.84	17.24
Earnings Per Share, Diluted	$ 7.30	$ 12.50	$ 16.53