Retirement Benefits (Components Of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 3	$ 3
Interest cost	186	164	557	490
Expected return on assets	(197)	(180)	(589)	(540)
Settlements	1	0	4	0
Prior service cost (benefit)	7	7	21	21
Unrecognized net loss (gain)	12	23	35	69
Net periodic benefit cost	10	15	31	43
Retiree Medical and Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	1	0
Interest cost	15	13	46	39
Expected return on assets	(5)	(4)	(15)	(12)
Settlements	0	0	0	0
Prior service cost (benefit)	(55)	(61)	(175)	(183)
Unrecognized net loss (gain)	(2)	(2)	(6)	(6)
Net periodic benefit cost	(47)	(54)	(149)	(162)
AA [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	2	3
Interest cost	185	164	554	490
Expected return on assets	(196)	(180)	(587)	(540)
Settlements	1	0	4	0
Prior service cost (benefit)	7	7	21	21
Unrecognized net loss (gain)	12	23	35	69
Net periodic benefit cost	10	15	29	43
AA [Member] | Retiree Medical and Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	14	13	42	39
Expected return on assets	(5)	(4)	(15)	(12)
Settlements	0	0	0	0
Prior service cost (benefit)	(54)	(61)	(172)	(183)
Unrecognized net loss (gain)	(2)	(2)	(6)	(6)
Net periodic benefit cost	$ (47)	$ (54)	$ (151)	$ (162)