0000927628 2025-09-11 2025-09-11 0000927628 us-gaap:CommonStockMember 2025-09-11 2025-09-11 0000927628 cof:SeriesIPreferredStockMember 2025-09-11 2025-09-11 0000927628 cof:SeriesJPreferredStockMember 2025-09-11 2025-09-11 0000927628 cof:SeriesKPreferredStockMember 2025-09-11 2025-09-11 0000927628 cof:SeriesLPreferredStockMember 2025-09-11 2025-09-11 0000927628 cof:SeriesNPreferredStockMember 2025-09-11 2025-09-11 0000927628 us-gaap:SeniorNotesMember 2025-09-11 2025-09-11 CAPITAL ONE FINANCIAL CORP false 0000927628 8-K 2025-09-11 DE 001-13300 54-1719854 1680 Capital One Drive McLean VA 22102 (703) 720-1000 false false false false Common Stock (par value $.01 per share) COF NYSE Depositary Shares, Each Representing a 1/40th Interest in a Share of Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series I COF PRI NYSE Depositary Shares, Each Representing a 1/40th Interest in a Share of Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series J COF PRJ NYSE Depositary Shares, Each Representing a 1/40th Interest in a Share of Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series K COF PRK NYSE Depositary Shares, Each Representing a 1/40th Interest in a Share of Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series L COF PRL NYSE Depositary Shares, Each Representing a 1/40th Interest in a Share of Fixed Rate Non-Cumulative Perpetual Preferred Stock, Series N COF PRN NYSE 1.650% Senior Notes Due 2029 COF29 NYSE false