Capital Stock (Tables)

12 Months Ended

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