Employee Benefit Plans (Schedule Of Assumptions Used In Calculating Projected Benefit Cost And Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	6.20%
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate range	3.89-4.09	4.70-5.00	3.75-4.08
Expected return on plan assets percentage range	3.30-6.70	3.50-6.70	2.90-6.10
Benefit obligation increase	$ 18
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%	4.89%	3.98%
Average rate of future compensation increases	4.00%	4.00%	4.00%
Expected return on plan assets	6.20%	6.50%	5.40%
Benefit obligation increase	$ 82