Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Service related, net	$ 1,788	$ 1,440	$ 1,865
Net gain on mortgage loans held for sale	437	354	599
Total revenues	2,225	1,794	2,464
Expenses:
Salaries, wages and benefits	695	634	789
General and administrative	624	538	485
Total expenses	1,319	1,172	1,274
Interest income	790	528	261
Interest expense	(776)	(537)	(424)
Other income (expense), net	(19)	41	187
Total other income (expenses), net	(5)	32	24
Income before income tax expense	901	654	1,214
Less: Income tax expense	232	154	291
Net income	$ 669	$ 500	$ 923
Earnings Per Share [Abstract]
Earnings Per Share, Basic	$ 10.40	$ 7.46	$ 12.84
Earnings Per Share, Diluted	$ 10.19	$ 7.30	$ 12.50