Retirement Benefits (Schedule Of Amounts Recognized In Consolidated Balance Sheets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liability	$ 5,828	$ 6,780
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liability	31	21
Noncurrent liability	4,811	6,809
Amounts recognized in the consolidated balance sheets	4,842	6,830
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liability	129	0
Noncurrent liability	1,017	1,201
Amounts recognized in the consolidated balance sheets	1,146	1,201
AA [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liability	5,693	6,780
AA [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liability	31	21
Noncurrent liability	4,786	6,809
Amounts recognized in the consolidated balance sheets	4,817	6,830
AA [Member] | Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liability	118	0
Noncurrent liability	907	1,201
Amounts recognized in the consolidated balance sheets	$ 1,025	$ 1,201