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Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Millions | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Treasury Stock [Member] | Total Shareholders' Equity Of MBIA Inc. [Member] | Preferred Stock [Member] | Preferred Stock And Non Controlling Interest Held For Sale [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Total equity balance at Dec. 31, 2021 |  | $ 283 | $ 2,931 | $ (458) | $ 100 | $ (3,169) | $ (313) |  | $ 13
Balance (in common stock shares) at Dec. 31, 2021 |  | 283,186,115 |  |  |  |  |  |  |
Balance (in treasury stock shares) at Dec. 31, 2021 |  |  |  |  |  | (228,630,003) |  |  |
Net income (loss) attributable to MBIA Inc. | $ (109) |  |  | (109) |  |  |  |  |
Other comprehensive income (loss) | (331) |  |  |  | (331) |  |  |  |
Treasury shares acquired under share repurchase program |  |  |  |  |  | $ 0 |  |  |
Treasury shares acquired under share repurchase program (in shares) |  |  |  |  |  | 0 |  |  |
Other |  |  |  |  |  | $ 17 |  |  |
Others (in shares) |  |  |  |  |  | 343,604 |  |  |
Period change |  |  | (12) |  |  |  | (435) |  | 0
Total equity balance at Jun. 30, 2022 | (735) |  | 2,919 | (567) | (231) | $ (3,152) | (748) |  | 13
Balance (in treasury stock shares) at Jun. 30, 2022 |  |  |  |  |  | (228,286,399) |  |  |
Balance (in preferred stock shares) at Jun. 30, 2022 |  |  |  |  |  |  |  | 1,315 |
Total equity balance at Mar. 31, 2022 |  | $ 283 | 2,919 | (531) | (82) | $ (3,154) | (565) |  | 13
Balance (in common stock shares) at Mar. 31, 2022 |  | 283,186,115 |  |  |  |  |  |  |
Balance (in treasury stock shares) at Mar. 31, 2022 |  |  |  |  |  | (228,329,115) |  |  |
Net income (loss) attributable to MBIA Inc. | (36) |  |  | (36) |  |  |  |  |
Other comprehensive income (loss) | (149) |  |  |  | (149) |  |  |  |
Treasury shares acquired under share repurchase program |  |  |  |  |  | $ 0 |  |  |
Treasury shares acquired under share repurchase program (in shares) |  |  |  |  |  | 0 |  |  |
Other |  |  |  |  |  | $ 2 |  |  |
Others (in shares) |  |  |  |  |  | 42,716 |  |  |
Period change |  |  | 0 |  |  |  | (183) |  | 0
Total equity balance at Jun. 30, 2022 | (735) |  | 2,919 | (567) | (231) | $ (3,152) | (748) |  | 13
Balance (in treasury stock shares) at Jun. 30, 2022 |  |  |  |  |  | (228,286,399) |  |  |
Balance (in preferred stock shares) at Jun. 30, 2022 |  |  |  |  |  |  |  | 1,315 |
Total equity balance at Dec. 31, 2022 | $ (876) | $ 283 | 2,925 | (653) | (283) | $ (3,154) | (882) |  | 6
Balance (in common stock shares) at Dec. 31, 2022 | 283,186,115 | 283,186,115 |  |  |  |  |  |  |
Balance (in treasury stock shares) at Dec. 31, 2022 | (228,333,444) |  |  |  |  | (228,333,444) |  |  |
Net income (loss) attributable to MBIA Inc. | $ (167) |  |  | (167) |  |  |  |  |
Other comprehensive income (loss) | 70 |  |  |  | 70 |  |  |  |
Treasury shares acquired under share repurchase program |  |  |  |  |  | $ (23) |  |  |
Treasury shares acquired under share repurchase program (in shares) |  |  |  |  |  | (2,896,820) |  |  |
Other |  |  |  |  |  | $ 12 |  |  |
Others (in shares) |  |  |  |  |  | 87,064 |  |  |
Period change |  |  | (10) |  |  |  | (118) |  | 6
Total equity balance at Jun. 30, 2023 | $ (988) |  | 2,915 | (820) | (213) | $ (3,165) | (1,000) |  | 12
Balance (in treasury stock shares) at Jun. 30, 2023 | (231,143,200) |  |  |  |  | (231,143,200) |  |  |
Balance (in preferred stock shares) at Jun. 30, 2023 | 0 |  |  |  |  |  |  | 1,315 |
Total equity balance at Mar. 31, 2023 |  | $ 283 | 2,915 | (746) | (221) | $ (3,143) | (912) |  | 13
Balance (in common stock shares) at Mar. 31, 2023 |  | 283,186,115 |  |  |  |  |  |  |
Balance (in treasury stock shares) at Mar. 31, 2023 |  |  |  |  |  | (228,221,641) |  |  |
Net income (loss) attributable to MBIA Inc. | $ (74) |  |  | (74) |  |  |  |  |
Other comprehensive income (loss) | 8 |  |  |  | 8 |  |  |  |
Treasury shares acquired under share repurchase program |  |  |  |  |  | $ (23) |  |  |
Treasury shares acquired under share repurchase program (in shares) |  |  |  |  |  | (2,896,820) |  |  |
Other |  |  |  |  |  | $ 1 |  |  |
Others (in shares) |  |  |  |  |  | (24,739) |  |  |
Period change |  |  | 0 |  |  |  | (88) |  | (1)
Total equity balance at Jun. 30, 2023 | $ (988) |  | $ 2,915 | $ (820) | $ (213) | $ (3,165) | $ (1,000) |  | $ 12
Balance (in treasury stock shares) at Jun. 30, 2023 | (231,143,200) |  |  |  |  | (231,143,200) |  |  |
Balance (in preferred stock shares) at Jun. 30, 2023 | 0 |  |  |  |  |  |  | 1,315 |

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