Pension And Other Postretirement Benefits (Long-Term Rates Of Pension And Other Postretirement Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Total recorded in other comprehensive income	$ 4,619	$ (7,281)	$ 1,523
Pension Benefits - U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.00%	4.00%	5.00%
Long-term rate of return on funded assets	7.25%	7.25%	7.25%
Long-term rate of compensation increase	5.75%	5.75%	5.75%
Service cost	677	801	665
Interest cost	807	749	820
Expected return on plan assets	(799)	(835)	(789)
Amortization of actuarial loss/(gain)	409	646	576
Amortization of prior service cost	8	7	7
Net pension enhancement and curtailment/settlement cost	276	723	333
Net periodic benefit cost	1,378	2,091	1,612
Net actuarial loss/(gain)	2,494	(1,302)	1,885
Amortization of actuarial (loss)/gain	(685)	(1,369)	(909)
Prior service cost/(credit)	(25)
Amortization of prior service (cost)/credit	(8)	(7)	(7)
Total recorded in other comprehensive income	1,776	(2,678)	969
Total recorded in net periodic benefit cost and other comprehensive income, before tax	3,154	(587)	2,581
Pension Benefits - Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.30%	3.80%	4.00%
Long-term rate of return on funded assets	6.30%	6.40%	6.60%
Long-term rate of compensation increase	5.40%	5.50%	5.40%
Service cost	590	697	648
Interest cost	1,138	1,076	1,145
Expected return on plan assets	(1,193)	(1,128)	(1,109)
Amortization of actuarial loss/(gain)	628	852	844
Amortization of prior service cost	120	117	117
Net pension enhancement and curtailment/settlement cost		22	1,540	[1]
Net periodic benefit cost	1,283	1,636	3,185
Net actuarial loss/(gain)	2,969	(1,938)	1,906
Amortization of actuarial (loss)/gain	(628)	(874)	(2,384)
Prior service cost/(credit)	(70)	30	71
Amortization of prior service (cost)/credit	(120)	(117)	(117)
Foreign exchange rate changes	(688)	(155)	271
Total recorded in other comprehensive income	1,463	(3,054)	(253)
Total recorded in net periodic benefit cost and other comprehensive income, before tax	2,746	(1,418)	2,932
Pension Benefits - Non-U.S. [Member] | Japan Transaction Disposal Group [Member]
Defined Benefit Plan Disclosure [Line Items]
Net pension enhancement and curtailment/settlement cost		1,420
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.00%	4.00%	5.00%
Long-term rate of return on funded assets	7.25%	7.25%	7.25%
Long-term rate of compensation increase	5.75%	5.75%	5.75%
Service cost	140	176	134
Interest cost	383	352	380
Expected return on plan assets	(37)	(41)	(38)
Amortization of actuarial loss/(gain)	116	228	170
Amortization of prior service cost	14	21	34
Net periodic benefit cost	616	736	680
Net actuarial loss/(gain)	1,518	(1,290)	1,008
Amortization of actuarial (loss)/gain	(116)	(228)	(170)
Amortization of prior service (cost)/credit	(14)	(21)	(34)
Foreign exchange rate changes	(8)	(10)	3
Total recorded in other comprehensive income	1,380	(1,549)	807
Total recorded in net periodic benefit cost and other comprehensive income, before tax	$ 1,996	$ (813)	$ 1,487

[1] Non-U.S. net pension enhancement and curtailment/settlement cost for 2012 includes $1,420 million (on a consolidated-company, before-tax basis) of accumulated other comprehensive income for the postretirement benefit reserves adjustment that was recycled into earnings and included in the Japan restructuring gain reported in “Other income”.