Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Interest and fee income:
Loans and leases	$ 8,092	$ 7,481	$ 6,811
Available-for-sale securities
Taxable	1,023	1,251	1,016
Tax-exempt	132	112	104
Held-to-maturity securities-taxable	423	385	401
Other securities-taxable	47	42	53
Other	593	650	531
Total interest income	10,310	9,921	8,916
Interest expense:
Deposits	3,282	3,572	2,497
Short-term borrowings	50	69	179
Long-term debt	987	935	801
Total interest expense	4,319	4,576	3,477
Net interest income	5,991	5,345	5,439
Provision for credit losses	463	420	402
Net interest income after provision for credit losses	5,528	4,925	5,037
Noninterest income:
Noninterest income	2,175	2,040	1,921
Noninterest expense:
Personnel costs	2,995	2,701	2,529
Outside data processing and other services	772	665	605
Equipment	268	267	263
Net occupancy	232	221	246
Professional services	155	99	99
Marketing	127	116	115
Deposit and other insurance expense	65	114	302
Amortization of intangibles	46	47	50
Lease financing equipment depreciation	13	15	27
Other noninterest expense	342	317	338
Total noninterest expense	5,015	4,562	4,574
Income before income taxes	2,688	2,403	2,384
Provision for income taxes	459	443	413
Income after income taxes	2,229	1,960	1,971
Income attributable to non-controlling interest	18	20	20
Net income attributable to Huntington	2,211	1,940	1,951
Dividends on preferred shares	124	134	142
Impact of preferred stock redemptions and repurchases	0	5	(8)
Net income applicable to common shares	$ 2,087	$ 1,801	$ 1,817
Average common shares—basic (in shares)	1,478,945	1,451,421	1,446,449
Average common shares—diluted (in shares)	1,504,836	1,476,442	1,468,016
Per common share:
Net income—basic (in USD per share)	$ 1.41	$ 1.24	$ 1.26
Net income—diluted (in USD per share)	$ 1.39	$ 1.22	$ 1.24
Payments and cash management revenue
Noninterest income:
Noninterest income	$ 664	$ 620	$ 585
Wealth and asset management revenue
Noninterest income:
Noninterest income	409	364	328
Customer deposit and loan fees
Noninterest income:
Noninterest income	390	334	312
Capital markets and advisory fees
Noninterest income:
Noninterest income	346	327	248
Mortgage banking income
Noninterest income:
Noninterest income	141	130	109
Insurance income
Noninterest income:
Noninterest income	81	77	74
Leasing revenue
Noninterest income:
Noninterest income	66	79	112
Net gains (losses) on sales of securities
Noninterest income:
Noninterest income	(58)	(21)	(7)
Other noninterest income
Noninterest income:
Noninterest income	$ 136	$ 130	$ 160