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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Consolidated Statements of Changes in Stockholders' Equity [Abstract] |  |  |
Cash dividends - per share (in dollars per share) | $ 1.10 | $ 1.08 | $ 1.05
Purchase of treasury shares (in shares) | 604,637 | 263,507 |
Net issuance of shares to employee benefit plans and other stock plans (in shares) | 143,555 | 95,990 | 123,645

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