Retirement Benefits (Components Of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 1	$ 2	$ 2
Interest cost	185	163	371	326
Expected return on assets	(197)	(180)	(393)	(360)
Settlements	1	0	3	0
Prior service cost (benefit)	7	7	14	14
Unrecognized net loss (gain)	12	23	23	46
Net periodic benefit cost	10	14	20	28
Retiree Medical and Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	0	1	0
Interest cost	16	13	31	26
Expected return on assets	(5)	(4)	(10)	(8)
Settlements	0	0	0	0
Prior service cost (benefit)	(59)	(61)	(120)	(122)
Unrecognized net loss (gain)	(2)	(2)	(4)	(4)
Net periodic benefit cost	(49)	(54)	(102)	(108)
AA [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	1	2
Interest cost	184	163	369	326
Expected return on assets	(196)	(180)	(391)	(360)
Settlements	1	0	3	0
Prior service cost (benefit)	7	7	14	14
Unrecognized net loss (gain)	12	23	23	46
Net periodic benefit cost	9	14	19	28
AA [Member] | Retiree Medical and Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	14	13	28	26
Expected return on assets	(5)	(4)	(10)	(8)
Settlements	0	0	0	0
Prior service cost (benefit)	(58)	(61)	(118)	(122)
Unrecognized net loss (gain)	(2)	(2)	(4)	(4)
Net periodic benefit cost	$ (51)	$ (54)	$ (104)	$ (108)