Pension And Other Postretirement Benefits (Components Of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost		$ 190		$ 155		$ 135
Reduction in net periodic benefit cost for post retirement benefit due to drug benefit		43		39		42
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		165	[1]	148	[1]	139	[1]
Interest cost		678	[1]	682	[1]	682	[1]
Expected return on plan assets		(806)	[1]	(787)	[1]	(758)	[1]
Amortization of prior service cost (benefit)	18	19	[1]	17	[1]	16	[1]
Recognized actuarial loss	(388)	247	[1]	181	[1]	111	[1]
Settlements		2	[1],[2]	2	[1],[2]	14	[1],[2]
Curtailments		(9)	[1],[3]	(10)	[1],[3]	3	[1],[3]
Net periodic benefit cost		296	[1],[4]	233	[1],[4]	207	[1],[4]
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		17	[5]	20	[5]	21	[5]
Interest cost		158	[5]	174	[5]	184	[5]
Expected return on plan assets		(2)	[5]	(7)	[5]	(11)	[5]
Amortization of prior service cost (benefit)	(16)	(17)	[5]	(15)	[5]	(11)	[5]
Recognized actuarial loss	(10)	26	[5]	33	[5]	41	[5]
Settlements				(3)	[2],[5]
Curtailments						(1)	[3],[5]
Net periodic benefit cost		$ 182	[4],[5]	$ 202	[4],[5]	$ 223	[4],[5]

[1] In 2011, 2010, and 2009, net periodic benefit cost for U.S pension plans was $190, $155, and $135, respectively.

[2] In all periods presented, settlements were due to the payment of significant lump sum benefits and/or purchases of annuity contracts.

[3] In each period presented, curtailments were due to elimination of benefits, workforce reductions (see Note D), and/or divestitures of the EES business (see Note F).

[4] Amounts attributed to joint venture partners are not included.

[5] In 2011, 2010, and 2009, net periodic benefit cost for other postretirement benefits reflects a reduction of $43, $39, and $42, respectively, related to the recognition of the federal subsidy awarded under Medicare Part D.