Retirement Plans (Reconciliation Of The Change In AOCI For Defined-Benefit Retirement Plans) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Amortization of:
Change in AOCL, pretax	$ (2,595)		$ 1,149		$ 1,129
Pension Benefits
Compensation And Retirement Disclosure Line Items
Net actuarial loss (gain)	(1,704)		1,241
Prior service cost	(234)		0
Amortization of:
Net actuarial loss from prior years	(409)		(287)
Prior service credit (cost)	67		42
Other	(12)	[1]	(5)	[1]
Change in AOCL, pretax	(2,292)		991
Other Postretirement Benefit Plans, Defined Benefit
Compensation And Retirement Disclosure Line Items
Net actuarial loss (gain)	(264)		177
Prior service cost	0		0
Amortization of:
Net actuarial loss from prior years	(26)		(10)
Prior service credit (cost)	(7)		(7)
Other	(6)	[1]	(2)	[1]
Change in AOCL, pretax	$ (303)		$ 158

[1] Includes foreign exchange translation and curtailment adjustments.