Employee Benefit Plans (Actual Asset Allocation For Global Pension Plan Assets) (Details) - Pension Benefits [Member]	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Asset allocation	100.00%	100.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation	58.00%	59.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation	40.00%	40.00%
Other Pension Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation	2.00%	1.00%
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Percentage of U.S. pension plan to global pension plan assets (as a percent)	78.00%
UNITED STATES | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation	60.00%
UNITED STATES | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation	40.00%
Foreign Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation	56.00%
Foreign Plan [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation	43.00%
Foreign Plan [Member] | Other Pension Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation	1.00%