Retirement Benefits (Weighted Average Actuarial Assumptions Utilized) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension  Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate (for expense)	2.57%	3.48%
Expected return on plan assets	5.31%	5.74%
Rate of compensation increase (for expense)*	1.76%	1.74%
Discount rate (for benefit obligation)	1.92%	2.57%
Rate of compensation increase (for benefit obligation)*	1.85%	1.76%
Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate (for expense)	2.72%	3.65%
Expected return on plan assets	0.00%	0.00%
Rate of compensation increase (for expense)*	0.00%	0.00%
Discount rate (for benefit obligation)	2.42%	2.72%
Rate of compensation increase (for benefit obligation)*	0.00%	0.00%
U.S. | Pension  Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate (for expense)	3.44%	4.45%
Expected return on plan assets	7.82%	7.95%
Discount rate (for benefit obligation)	2.73%	3.44%
U.S. | Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate (for expense)	3.10%	4.24%
Expected return on plan assets	0.00%	0.00%
Discount rate (for benefit obligation)	2.18%	3.10%
Non-U.S. | Pension  Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate (for expense)	2.09%	2.89%
Expected return on plan assets	4.35%	4.87%
Rate of compensation increase (for expense)*	2.75%	2.82%
Discount rate (for benefit obligation)	1.49%	2.09%
Rate of compensation increase (for benefit obligation)*	2.84%	2.75%
Non-U.S. | Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate (for expense)	2.53%	3.32%
Expected return on plan assets	0.00%	0.00%
Rate of compensation increase (for expense)*	0.00%	0.00%
Discount rate (for benefit obligation)	1.96%	2.53%
Rate of compensation increase (for benefit obligation)*	0.00%	0.00%