Defined Benefit Pension Plans - Significant Actuarial Weighted Assumptions (Discount Rate) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	1.10%	1.76%	2.24%
Percentage of Benefit Plans Denominated in Euro [Domain]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percentage of benefit plans denominated in euro	92
Shorter duration euro denominated defined benefit plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	0.20%
Longer duration euro denominated defined benefit plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	0.75%