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Consolidated Statements Of Changes In Shareholders' Equity - USD ($) shares in Millions, $ in Millions | Total | Nonredeemable Preferred Stock | Common Stock | Capital Surplus | Accumulated Other Comprehensive (Loss) Income | Retained Earnings | Treasury Stock
--- | --- | --- | --- | --- | --- | --- | ---
BALANCE (in shares) |  |  |  | 160.1 |  |  |  |
BALANCE at Dec. 31, 2018 | $ 7,507 |  |  | $ 1,141 | $ 2,148 | $ (686) | $ 8,858 | $ (3,954)
Cumulative effect of change in accounting principle | (14) |  |  |  |  |  | (14) |
Net income (loss) | 1,202 | [1] |  |  |  |  | 1,202 |
Other comprehensive income (loss), net of tax | 370 |  |  |  |  | 370 |  |
Cash dividends declared on common stock | (398) |  |  |  |  |  | (398) |
Purchase of common stock (in shares) |  |  |  | (18.7) |  |  |  |
Purchase of common stock | (1,380) |  |  |  |  |  |  | (1,380)
Issuance of preferred stock | 0 |  |  |  |  |  |  |
Net issuance of common stock under employee stock plans (in shares) |  |  |  | 0.7 |  |  |  |
Net issuance of common stock under employee stock plans | 1 |  |  |  | (13) |  | (29) | 43
Share-based compensation | 39 |  |  |  | 39 |  |  |
BALANCE at Dec. 31, 2019 | 7,327 |  |  | $ 1,141 | 2,174 | (316) | 9,619 | (5,291)
BALANCE (in shares) |  |  |  | 142.1 |  |  |  |
Cumulative effect of change in accounting principle | 13 |  |  |  |  |  | 13 |
Net income (loss) | 497 | [1] |  |  |  |  | 497 |
Other comprehensive income (loss), net of tax | 380 |  |  |  |  | 380 |  |
Cash dividends declared on common stock | (378) |  |  |  |  |  | (378) |
Dividends, Preferred Stock, Cash | (13) |  |  |  |  |  | (13) |
Purchase of common stock (in shares) |  |  |  | (3.4) |  |  |  |
Purchase of common stock | (194) |  |  |  |  |  |  | (194)
Issuance of preferred stock | 394 |  | $ 394 |  |  |  |  |
Net issuance of common stock under employee stock plans (in shares) |  |  |  | 0.5 |  |  |  |
Net issuance of common stock under employee stock plans | 0 |  |  |  | (13) |  | (11) | 24
Share-based compensation | 24 |  |  |  | 24 |  |  |
BALANCE at Dec. 31, 2020 | 8,050 |  | 394 | $ 1,141 | 2,185 | 64 | 9,727 | (5,461)
BALANCE (in shares) |  |  |  | 139.2 |  |  |  |
Net income (loss) | 1,168 |  |  |  |  |  | 1,168 |
Other comprehensive income (loss), net of tax | (276) |  |  |  |  | (276) |  |
Cash dividends declared on common stock | (365) |  |  |  |  |  | (365) |
Dividends, Preferred Stock, Cash | (23) |  |  |  |  |  | (23) |
Purchase of common stock (in shares) |  |  |  | (9.5) |  |  |  |
Purchase of common stock | (723) |  |  |  | (24) |  |  | (699)
Issuance of preferred stock | 0 |  |  |  |  |  |  |
Net issuance of common stock under employee stock plans (in shares) |  |  |  | 1.0 |  |  |  |
Net issuance of common stock under employee stock plans | 25 |  |  |  | (27) |  | (13) | 65
Share-based compensation | 41 |  |  |  | 41 |  |  |
BALANCE at Dec. 31, 2021 | $ 7,897 |  | $ 394 | $ 1,141 | $ 2,175 | $ (212) | $ 10,494 | $ (6,095)
BALANCE (in shares) |  |  |  | 130.7 |  |  |  |
[1] | See Defined Benefit Pension and Other Postretirement Costs in Note 1.

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