Consolidated Statement of Changes in Shareholders' Equity (Parentheticals) - shares	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement of Stockholders' Equity [Abstract]
Common shares issued from treasury stock for stock-based compensation (in shares)	2,907,710	5,284,974
Common shares repurchased (in shares)	25,792,061	12,804,035