Pension and Other Retiree Benefits (Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension | U.S.
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.50%	3.80%	4.60%
Expected long-term rate of return	7.40%	7.80%	7.80%
Pension | International
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.10%	2.30%	3.70%
Expected long-term rate of return	5.00%	5.50%	6.00%
Rate of compensation increase	2.80%	3.10%	3.00%
Post-retirement
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.20%	3.40%	3.90%