Capital Stock (Tables)

12 Months Ended

Dec. 31, 2019

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)	2019		2018		2017
Beginning Balance, January 1	179,724		179,862		179,367
Stock incentive plan net activity	952		672		985
Repurchase of common stock	(536	)	(810	)	(490	)
Ending Balance, December 31	180,140		179,724		179,862