Retirement Benefits (Status Of The Company Plans) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Fair value at January 1	$ 170
Company contributions	489	157
Fair value at December 31	155	170
Regular Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at January 1	6,129	5,821
Service cost	0	0	14
Interest cost	341	341	336
Plan amendments	0	0
Settlement/curtailment	0	0
Actuarial (gain) loss	702	173
Foreign exchange valuation adjustment	0	0
Employee contributions	0	0
Tax payments	0	0
Benefit payments	(224)	(206)
Benefit obligation at December 31	6,948	6,129	5,821
Fair value at January 1	4,308	3,898
Return on plan assets	178	466
Company contributions	480	150
Settlements/curtailments	0	0
Foreign exchange valuation adjustment	0	0
Tax payments from plan assets	0	0
Benefit payments from plan assets	(224)	(206)
Fair value at December 31	4,742	4,308	3,898
Funded status of the plan	(2,206)	(1,821)
Unrecognized net loss	3,527	2,799
Unrecognized prior service cost	0	0
Prepaid (accrued) pension cost	1,321	978
Non-current benefit liability	(2,206)	(1,821)
Deferred income taxes	1,292	1,033
Accumulated other comprehensive loss	2,235	1,766
Officers' And MSPP [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at January 1	44	52
Service cost	0	0	0
Interest cost	3	3	6
Plan amendments	0	0
Settlement/curtailment	0	0
Actuarial (gain) loss	12	4
Foreign exchange valuation adjustment	0	0
Employee contributions	0	0
Tax payments	(5)	(3)
Benefit payments	(16)	(12)
Benefit obligation at December 31	38	44	52
Fair value at January 1	12	17
Return on plan assets	0	1
Company contributions	9	7
Settlements/curtailments	0	0
Foreign exchange valuation adjustment	0	0
Tax payments from plan assets	0	(1)
Benefit payments from plan assets	(16)	(12)
Fair value at December 31	5	12	17
Funded status of the plan	(32)	(32)
Unrecognized net loss	9	11
Unrecognized prior service cost	0	0
Prepaid (accrued) pension cost	(23)	(21)
Non-current benefit liability	(32)	(32)
Deferred income taxes	3	4
Accumulated other comprehensive loss	6	7
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at January 1	1,423	1,438
Service cost	17	24	26
Interest cost	72	84	77
Plan amendments	20	(115)
Settlement/curtailment	(19)	2
Actuarial (gain) loss	123	54
Foreign exchange valuation adjustment	(10)	(19)
Employee contributions	0	5
Tax payments	0	0
Benefit payments	(38)	(50)
Benefit obligation at December 31	1,588	1,423	1,438
Fair value at January 1	1,214	1,102
Return on plan assets	23	125
Company contributions	38	41
Settlements/curtailments	(19)	0
Foreign exchange valuation adjustment	1	(9)
Tax payments from plan assets	0	0
Benefit payments from plan assets	(38)	(50)
Fair value at December 31	1,219	1,214	1,102
Funded status of the plan	(369)	(209)
Unrecognized net loss	462	311
Unrecognized prior service cost	(55)	(99)
Prepaid (accrued) pension cost	38	3
Non-current benefit liability	(369)	(209)
Deferred income taxes	26	14
Accumulated other comprehensive loss	$ 381	$ 198