Consolidated Statement of Changes in Shareholders' Equity (Parentheticals) - shares	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Common shares issued from treasury stock for stock-based compensation (in shares)	1,197,083	1,859,065
Common shares repurchased (in shares)	9,328,184	5,699,525

Number of shares that have been repurchased during the period and are being held in treasury.

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Period Type:	duration