Retirement Benefits (Components Of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 1
Interest cost	186	163
Expected return on assets	(196)	(180)
Settlements	2	0
Prior service cost	7	7
Unrecognized net loss (gain)	11	23
Net periodic benefit cost	10	14
Retiree Medical and Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	15	13
Expected return on assets	(5)	(4)
Settlements	0	0
Prior service cost	(61)	(61)
Unrecognized net loss (gain)	(2)	(2)
Net periodic benefit cost	(53)	(54)
AA [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	1
Interest cost	185	163
Expected return on assets	(195)	(180)
Settlements	2	0
Prior service cost	7	7
Unrecognized net loss (gain)	11	23
Net periodic benefit cost	10	14
AA [Member] | Retiree Medical and Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	14	13
Expected return on assets	(5)	(4)
Settlements	0	0
Prior service cost	(60)	(61)
Unrecognized net loss (gain)	(2)	(2)
Net periodic benefit cost	$ (53)	$ (54)