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Parent Company Financial Statements Parent Company Financial Statements (Statements of Income) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other interest income |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 27 | $ 29 |  | $ 71 |
Interest on medium- and long-term debt | [1] |  |  |  |  |  |  |  |  |  |  |  |  | 35 | 80 |  | 197 |
Salaries and benefits expense |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,133 | 1,019 |  | 1,020 |
Other noninterest expenses |  |  |  |  |  |  |  |  |  |  |  |  |  | 39 | 66 |  | 75 |
Benefit for income taxes |  | $ 61 | $ 70 | $ 93 | $ 98 | $ 65 | [2] | $ 50 | [2] | $ 28 | [2] | $ (19) | [2] | 322 | 124 | [3] | 336 | [3]
Net Income |  | 228 | 262 | 328 | 350 | 221 | [2] | 217 | [2] | 118 | [2] | (59) | [2] | 1,168 | 497 | [3] | 1,202 | [3]
Less income allocated to participating securities |  | 1 | 1 | 2 | 1 | 1 |  | 0 |  | 1 |  | 0 |  | 5 | 2 |  | 7 |
Less preferred stock dividends |  | 6 | 6 | 5 | 6 | 5 |  | 8 |  | 0 |  | 0 |  |  |  |  |  |
Net income attributable to common shares |  | $ 221 | $ 255 | $ 321 | $ 343 | $ 215 | [2] | $ 209 | [2] | $ 117 | [2] | $ (59) | [2] | 1,140 | 482 |  | 1,195 |
Parent Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends from subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  | 849 | 498 |  | 1,229 |
Other interest income |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 | 4 |  | 20 |
Intercompany management fee |  |  |  |  |  |  |  |  |  |  |  |  |  | 235 | 209 |  | 224 |
Total income |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,085 | 711 |  | 1,473 |
Interest on medium- and long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 | 30 |  | 56 |
Salaries and benefits expense |  |  |  |  |  |  |  |  |  |  |  |  |  | 170 | 141 |  | 143 |
Other noninterest expenses |  |  |  |  |  |  |  |  |  |  |  |  |  | 72 | 66 |  | 79 |
Total expenses |  |  |  |  |  |  |  |  |  |  |  |  |  | 262 | 237 |  | 278 |
Income before benefit for income taxes and equity in undistributed earnings (losses) of subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  | 823 | 474 |  | 1,195 |
Benefit for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  | (6) | (6) |  | (9) |
Income before equity in undistributed earnings (losses) of subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  | 829 | 480 |  | 1,204 |
Equity in undistributed earnings of subsidiaries, principally banks | [4] |  |  |  |  |  |  |  |  |  |  |  |  | 339 | 17 |  | (2) |
Net Income |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,168 | 497 |  | 1,202 |
Less income allocated to participating securities |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 | 2 |  | 7 |
Less preferred stock dividends |  |  |  |  |  |  |  |  |  |  |  |  |  | 23 | 13 |  | 0 |
Net income attributable to common shares |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,140 | $ 482 |  | $ 1,195 |
[1] | Includes the effects of hedging.
[2] | Recast to reflect the retrospective application of the Corporation's election to change the accounting methodology for certain components of defined pension benefit credit. Refer to Note 1 for further information.
[3] | See Defined Benefit Pension and Other Postretirement Costs in Note 1.
[4] | Amounts for the years ended December 31, 2020 and December 31, 2019 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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