Retirement Benefits (Schedule Of Assumption Used Calculating Benefit Obligation) (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used to determine net periodic benefit cost, Expected return on plan assets					8.00%
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used to determine benefit obligations, Discount rate	5.10%	4.20%			5.10%	4.20%
Weighted-average assumptions used to determine net periodic benefit cost, Discount rate	4.20%	4.10%	4.20%	5.20%
Weighted-average assumptions used to determine net periodic benefit cost, Salary scale (ultimate)			0.00%	3.78%
Weighted-average assumptions used to determine net periodic benefit cost, Expected return on plan assets					8.00%	8.25%
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used to determine benefit obligations, Discount rate	4.71%	3.80%			4.71%	3.80%
Weighted-average assumptions used to determine net periodic benefit cost, Discount rate	3.80%	3.80%	3.80%	4.89%
Weighted-average assumptions used to determine net periodic benefit cost, Salary scale (ultimate)			0.00%	0.00%
Weighted-average assumptions used to determine net periodic benefit cost, Expected return on plan assets					8.00%	8.25%
AA [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used to determine net periodic benefit cost, Expected return on plan assets					8.00%
AA [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used to determine benefit obligations, Discount rate	5.10%	4.20%			5.10%	4.20%
Weighted-average assumptions used to determine net periodic benefit cost, Discount rate	4.20%	4.10%	4.20%	5.20%
Weighted-average assumptions used to determine net periodic benefit cost, Salary scale (ultimate)			0.00%	3.78%
Weighted-average assumptions used to determine net periodic benefit cost, Expected return on plan assets					8.00%	8.25%
AA [Member] | Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used to determine benefit obligations, Discount rate	4.71%	3.80%			4.71%	3.80%
Weighted-average assumptions used to determine net periodic benefit cost, Discount rate	3.80%	3.80%	3.80%	4.89%
Weighted-average assumptions used to determine net periodic benefit cost, Salary scale (ultimate)			0.00%	0.00%
Weighted-average assumptions used to determine net periodic benefit cost, Expected return on plan assets					8.00%	8.25%