Shareholders' Equity and Redeemable Non-controlling Interests, Shareholders' Equity, Treasury shares (Details) - shares	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Increase (Decrease) in Treasury Stock [Roll Forward]
Beginning balance (in shares)	6,568,745
Purchase of ordinary shares (in shares)	50,685	42,681,494
Ending balance (in shares)	6,127,269
Treasury shares [Member]
Increase (Decrease) in Treasury Stock [Roll Forward]
Beginning balance (in shares)	6,568,745	24,513,619
Share-based compensation (in shares)	(246,640)	(268,851)
Employee stock purchase plan (in shares)	(245,521)	(123,869)
Purchase of ordinary shares (in shares)	50,685	42,681,505
Ending balance (in shares)	6,127,269	66,802,404