Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Interest income:
Cash and investments	$ 22	$ 48	$ 43	$ 86
Total interest income	778	973	1,580	2,000
Total interest expense	650	843	1,322	1,718
Net interest income (loss)	128	130	258	282
Less: provisions for loan losses	37	14	67	26
Net interest income (loss) after provisions for loan losses	91	116	191	256
Other income (loss):
Servicing revenue	14	18	27	35
Asset recovery and business processing revenue	0	81	23	158
Other income	19	4	33	13
Gains (losses) on derivative and hedging activities, net	(5)	14	(30)	46
Total other income (loss)	28	117	53	252
Expenses:
Salaries and benefits	35	87	84	188
Other operating expenses	65	79	143	162
Total operating expenses	100	166	227	350
Goodwill and acquired intangible asset impairment and amortization expense	1	3	2	5
Restructuring/other reorganization expenses	0	16	3	17
Total expenses	101	185	232	372
Income before income tax expense	18	48	12	136
Income tax expense	4	12	1	27
Net income	$ 14	$ 36	$ 11	$ 109
Basic earnings per common share	$ 0.14	$ 0.32	$ 0.11	$ 0.98
Average common shares outstanding	100	111	101	112
Diluted earnings per common share	$ 0.13	$ 0.32	$ 0.11	$ 0.97
Average common and common equivalent shares outstanding	101	112	102	113
Dividends per common share	$ 0.16	$ 0.16	$ 0.32	$ 0.32
FFELP Loans [Member]
Interest income:
Total interest income	$ 483	$ 608	$ 975	$ 1,269
Less: provisions for loan losses	8	(2)	16	(1)
Private Education Loans [Member]
Interest income:
Total interest income	273	317	562	645
Less: provisions for loan losses	$ 29	$ 16	$ 51	$ 27