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Capital Stock (Tables) | 12 Months Ended
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Dec. 31, 2021
Equity [Abstract] |
Schedule of Common Stock Outstanding Roll Forward | The changes in shares of common stock outstanding for the three years ended December 31 are as follows:
(share units in thousands) | 2021 |  | 2020 |  | 2019
Beginning Balance, January 1 | 180,354 |  |  | 180,140 |  |  | 179,724 |
Stock incentive plan net activity | 716 |  |  | 986 |  |  | 952 |
Repurchase of common stock | (678) |  |  | (772) |  |  | (536) |
Ending Balance, December 31 | 180,392 |  |  | 180,354 |  |  | 180,140 |

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- Definition Tabular disclosure of the change in common stock outstanding. + References No definition available. + Details
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