Employee Benefit Plans (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Service Cost	$ 0	$ 0	$ 0	$ 0
Defined Benefit Plan, Interest Cost	242	245	726	737
Defined Benefit Plan, Expected Return on Plan Assets	(181)	(169)	(543)	(508)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
Defined Benefit Plan, Actuarial Net (Gains) Losses	14	12	42	36
Defined Benefit Plan, Recognized Net (Gain) Loss Due to Settlements	0	4	0	10
Defined Benefit Plan, Net Periodic Benefit Cost	75	92	225	275
Other Pension Plans, Postretirement or Supplemental Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Service Cost	13	14	39	44
Defined Benefit Plan, Interest Cost	45	49	135	147
Defined Benefit Plan, Expected Return on Plan Assets	(22)	(22)	(67)	(68)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1)	(1)	(2)	(3)
Defined Benefit Plan, Actuarial Net (Gains) Losses	(3)	(1)	(9)	(3)
Defined Benefit Plan, Recognized Net (Gain) Loss Due to Settlements	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	$ 32	$ 39	$ 96	$ 117