Postretirement Plans (Schedule Of Changes In The Benefit Obligation, Plan Assets And Funded Status Of Both Pensions And OPB) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Accrued pension plan liability, net	$ (10,474)	$ (19,651)
Pension Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	75,895	67,651
Service cost	1,886	1,649	1,406
Interest cost	2,906	3,005	3,116
Plan participants’ contributions	8	9
Amendments	111	13
Actuarial (gain)/loss	(9,205)	6,378
Settlement/curtailment/other	(81)	(76)
Gross benefits paid	(2,874)	(2,744)
Exchange rate adjustment	(21)	10
Ending balance	68,625	75,895	67,651
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance at fair value	56,178	51,051
Actual return on plan assets	3,316	6,300
Company contribution	1,542	1,550
Plan participants’ contributions	8	9
Settlement/curtailment/other	(103)	(71)
Benefits paid	(2,792)	(2,669)
Exchange rate adjustment	(18)	8
Ending balance at fair value	58,131	56,178	51,051
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Other assets	60	5
Other accrued liabilities	(80)	(71)
Accrued pension plan liability, net	(10,474)	(19,651)
Net amount recognized	(10,494)	(19,717)
Other Postretirement Benefits Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance	7,981	7,997
Service cost	148	146	221
Interest cost	263	313	484
Plan participants’ contributions	3	3
Amendments	4	12
Actuarial (gain)/loss	(905)	(53)
Settlement/curtailment/other	(57)	(1)
Gross benefits paid	(451)	(474)
Subsidies	32	37
Exchange rate adjustment	(7)	4
Ending balance	7,008	7,981	7,997
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance at fair value	110	102
Actual return on plan assets	23	1
Company contribution	14	15
Plan participants’ contributions	3	3
Settlement/curtailment/other	11	10
Benefits paid	(21)	(21)
Exchange rate adjustment
Ending balance at fair value	140	110	102
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Other accrued liabilities	(340)	(343)
Accrued retiree health care	(6,528)	(7,528)
Net amount recognized	$ (6,868)	$ (7,871)