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Parent Company Financial Statements Parent Company Financial Statements (Balance Sheets) (Details) - USD ($) $ / shares in Units, $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Cash and due from subsidiary bank |  | $ 1,236 | $ 1,031 |  |
Other short-term investments |  | 197 | 172 |  |
Premises and equipment |  | 454 | 459 |  |
Accrued income and other assets |  | 5,603 | 5,360 |  |
Total assets |  | 94,616 | 88,129 |  |
Medium- and long-term debt |  | 2,796 | 5,728 |  |
Accrued expenses and other liabilities |  | 1,584 | 1,482 |  |
Total liabilities |  | $ 86,719 | $ 80,079 |  |
Preferred Stock, No Par Value |  | $ 0 | $ 0 |  |
Preferred Stock, Shares Authorized |  | 4,000 | 4,000 |  |
Preferred Stock, Shares Issued |  | 4,000 | 4,000 |  |
Fixed rate reset non-cumulative perpetual preferred stock, series A, no par value, $100,000 liquidation preference per share: Authorized - 4,000 shares, Issued - 4,000 shares at 12/31/2021 and 12/31/2020 |  |  | $ 394 |  |
Common stock, par value |  | $ 5 | $ 5 |  |
Common stock, authorized shares |  | 325,000,000 | 325,000,000 |  |
Common stock, issued shares |  | 228,164,824 | 228,164,824 |  |
Common stock - $5 par value: Authorized - 325,000,000 shares; Issued - 228,164,824 shares |  |  | $ 1,141 |  |
Capital surplus |  |  | 2,185 |  |
Accumulated other comprehensive (loss) income |  | $ (212) | 64 | $ (316) |
Retained earnings |  |  | $ 9,727 |  |
Shares in treasury |  | 97,476,872 | 88,997,430 |  |
Less cost of common stock in treasury - 97,476,872 shares at 12/31/21 and 88,997,430 shares at 12/31/20 |  |  | $ 5,461 |  |
Total shareholders' equity |  | $ 7,897 | 8,050 | $ 7,327 | $ 7,507
Total liabilities and shareholders' equity |  | 94,616 | 88,129 |  |
Parent Company |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Cash and due from subsidiary bank |  | 1,105 | 1,489 |  |
Other short-term investments |  | 113 | 107 |  |
Due from Affiliates | [1] | 150 | 0 |  |
Investments in subsidiaries, principally banks |  | 8,278 | 8,215 |  |
Premises and equipment |  | 1 | 1 |  |
Accrued income and other assets |  | 265 | 329 |  |
Total assets |  | 9,912 | 10,141 |  |
Medium- and long-term debt |  | 1,736 | 1,818 |  |
Accrued expenses and other liabilities |  | 279 | 273 |  |
Total liabilities |  | 2,015 | 2,091 |  |
Fixed rate reset non-cumulative perpetual preferred stock, series A, no par value, $100,000 liquidation preference per share: Authorized - 4,000 shares, Issued - 4,000 shares at 12/31/2021 and 12/31/2020 |  | 394 | 394 |  |
Common stock - $5 par value: Authorized - 325,000,000 shares; Issued - 228,164,824 shares |  | 1,141 | 1,141 |  |
Capital surplus |  | 2,175 | 2,185 |  |
Accumulated other comprehensive (loss) income | [2] | (212) | 64 |  |
Retained earnings | [2] | 10,494 | 9,727 |  |
Less cost of common stock in treasury - 97,476,872 shares at 12/31/21 and 88,997,430 shares at 12/31/20 |  | (6,095) | (5,461) |  |
Total shareholders' equity |  | 7,897 | 8,050 |  |
Total liabilities and shareholders' equity |  | $ 9,912 | $ 10,141 |  |
[1] | In third quarter 2021 the Corporation issued a $150 million loan to Comerica Bank that, after an initial term of 13 months, will automatically extend at the end of each month to roll into a new 13 month plus one day term.
[2] | Balances for the year ended December 31, 2020 have been recast to reflect the retrospective application of the Corporation's election to change the accounting method for certain components of the qualified defined benefit pension plan as of January 1, 2021. Refer to Note 1 for further information.

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