Insider Trading Arrangements	3 Months Ended	9 Months Ended
	Sep. 30, 2023 shares	Sep. 30, 2023 shares
Trading Arrangements, by Individual
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Frank G. LaPrade [Member]
Trading Arrangements, by Individual
Material Terms of Trading Arrangement		Frank G. LaPrade, our Chief Enterprise Services Officer and Chief of Staff to the CEO, entered into a pre-arranged stock trading plan on July 28, 2023. Mr. LaPrade’s plan provides for the potential exercise of vested stock options and the associated sale of up to 70,975 shares of Capital One common stock in amounts and prices determined in accordance with a formula set forth in the plan and terminates on the earlier of the date all shares under the plan are sold and April 29, 2024.
Name	Frank G. LaPrade
Title	Chief Enterprise Services Officer and Chief of Staff to the CEO
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	July 28, 2023
Arrangement Duration	276 days
Aggregate Available	70,975	70,975
Ann Fritz Hackett [Member]
Trading Arrangements, by Individual
Material Terms of Trading Arrangement		Ann Fritz Hackett, our lead independent director, entered into a pre-arranged stock trading plan on August 8, 2023. Ms. Hackett’s plan provides for the associated sale of up to 15,000 shares of Capital One common stock in amounts and prices determined in accordance with a formula set forth in the plan and terminates on the earlier of the date all shares under the plan are sold and December 31, 2024.
Name	Ann Fritz Hackett
Title	lead independent director
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	August 8, 2023
Arrangement Duration	516 days
Aggregate Available	15,000	15,000
Lance Hackett [Member]
Trading Arrangements, by Individual
Material Terms of Trading Arrangement		Lance Hackett, spouse of Ann Fritz Hackett, our lead independent director, entered into a pre-arranged stock trading plan on August 8, 2023. Mr. Hackett’s plan provides for the associated sale of up to 5,005 shares of Capital One common stock in amounts and prices determined in accordance with a formula set forth in the plan and terminates on the earlier of the date all shares under the plan are sold and December 31, 2024.
Name	Lance Hackett
Title	spouse of Ann Fritz Hackett, our lead independent director
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	August 8, 2023
Arrangement Duration	511 days
Aggregate Available	5,005	5,005