Unaudited Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues:
Service related, net	$ 755	$ 580
Net gain on mortgage loans held for sale	297	679
Total revenues	1,052	1,259
Expenses:
Salaries, wages and benefits	228	277
General and administrative	110	177
Total expenses	338	454
Interest income	36	46
Interest expense	(106)	(126)
Other income, net	222	0
Total other income (expense), net	152	(80)
Income from continuing operations before income tax expense	866	725
Less: Income tax expense	208	166
Net income from continuing operations	658	559
Net income from discontinued operations	0	2
Net income	658	561
Less: Undistributed earnings attributable to participating stockholders	0	5
Net income attributable to common stockholders	$ 658	$ 556
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share	$ 8.91	$ 6.20
Income (Loss) from Continuing Operations, Per Diluted Share	8.59	5.90
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	0	0.02
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	0	0.02
Basic (in dollars per share)	8.91	6.22
Diluted (in dollars per share)	$ 8.59	$ 5.92