Supplemental Share Information - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Share Information Treasury Stock RollForward
Treasury Stock, Shares, Beginning Balance	349,148,819	347,306,778	334,702,932
Reacquired stock	23,526,293	10,209,963	22,602,748
Issuances pursuant to stock options and benefit plans	(5,217,224)	(8,367,922)	(9,998,902)
Treasury Stock, Shares, Ending Balance	367,457,888	349,148,819	347,306,778