Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income:
Cash and investments	$ 41	$ 19	$ 111	$ 25
Total interest income	1,170	881	3,338	2,199
Total interest expense	879	641	2,636	1,301
Net interest income	291	240	702	898
Less: provisions for loan losses	72	28	68	62
Net interest income after provisions for loan losses	219	212	634	836
Other income (loss):
Servicing revenue	15	24	48	60
Asset recovery and business processing revenue	85	80	240	264
Other revenue	5	6	15	22
Gains (losses) on derivative and hedging activities, net	26	40	44	161
Total other income	131	150	347	507
Expenses:
Salaries and benefits	99	106	302	337
Other operating expenses	134	88	299	251
Total operating expenses	233	194	601	588
Goodwill and acquired intangible asset impairment and amortization expense	3	10	8	17
Restructuring/other reorganization expenses	4	21	23	25
Total expenses	240	225	632	630
Income before income tax expense	110	137	349	713
Income tax expense	31	32	93	173
Net income	$ 79	$ 105	$ 256	$ 540
Basic earnings per common share	$ 0.66	$ 0.75	$ 2.06	$ 3.71
Average common shares outstanding	120	139	124	145
Diluted earnings per common share	$ 0.65	$ 0.75	$ 2.04	$ 3.67
Average common and common equivalent shares outstanding	121	141	125	147
Dividends per common share	$ 0.16	$ 0.16	$ 0.48	$ 0.48
FFELP Loans [Member]
Interest income:
Total interest income	$ 778	$ 553	$ 2,191	$ 1,312
Less: provisions for loan losses	36	0	51	0
Private Education Loans [Member]
Interest income:
Total interest income	351	309	1,036	862
Less: provisions for loan losses	$ 36	$ 28	$ 17	$ 62