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Capital One Financial Corporation (Parent Company Only) - Statements of Income (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Condensed Income Statements, Captions [Line Items] |  |  |
Interest income | $ 31,237 | $ 25,769 | $ 26,033
Interest expense | 4,123 | 1,598 | 3,120
Provision (benefit) for credit losses | 5,847 | (1,944) | 10,264
Non-interest income (loss) | 7,136 | 6,264 | 5,610
Non-interest expense | 19,163 | 16,570 | 15,056
Income tax benefit | 1,880 | 3,415 | 486
Net income | 7,360 | 12,390 | 2,714
Comprehensive income | (2,930) | 9,270 | 5,060
Parent Company |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Interest income | 595 | 151 | 186
Interest expense | 969 | 392 | 510
Provision (benefit) for credit losses | (1) | (1) | 0
Dividends from subsidiaries | 4,352 | 13,970 | 3,003
Non-interest income (loss) | (15) | (26) | (127)
Non-interest expense | 35 | 36 | 33
Income before income taxes and equity in undistributed earnings of subsidiaries | 3,929 | 13,668 | 2,519
Income tax benefit | (181) | (82) | (93)
Equity in undistributed earnings of subsidiaries | 3,250 | (1,360) | 102
Net income | 7,360 | 12,390 | 2,714
Other comprehensive income (loss), net of tax | (10,290) | (3,120) | 2,346
Comprehensive income | $ (2,930) | $ 9,270 | $ 5,060

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