Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income attributable to Huntington	$ 629	$ 517	$ 1,692	$ 1,410
Other comprehensive income, net of tax:
Unrealized gains on available-for-sale securities, net of hedges	153	445	505	247
Net change related to cash flow hedges on loans	23	360	283	324
Translation adjustments, net of hedges	(1)	2	6	0
Change in accumulated unrealized losses for pension and other post-retirement obligations	0	0	1	1
Other comprehensive income, net of tax	175	807	795	572
Comprehensive income attributable to Huntington	804	1,324	2,487	1,982
Comprehensive income attributed to non-controlling interest	4	5	14	16
Comprehensive income	$ 808	$ 1,329	$ 2,501	$ 1,998