Benefit Plans Future Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 58,319
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	57,322
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	58,018
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	59,218
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	59,280
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 290,031
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	0.32%	0.51%
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 49,784
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	48,687
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	49,242
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	50,370
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	50,415
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 246,920
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	0.51%	1.22%	0.97%
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.22%	3.03%
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 8,382
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	8,507
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	8,666
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	8,750
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	8,778
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 42,808
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.03%	4.11%	3.49%
Other Postretirement Benefits Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	1.47%	2.54%
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 153
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	128
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	110
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	98
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	87
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 303
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.54%	3.75%	3.15%
Healthcare Cost Trend Rate Maximum	6.00%	6.40%
Healthcare Cost Trend Rate Minimum Percentage	6.20%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%