Retirement Plans (Pension Benefit Adjustments Recognized In Other Comprehensive (Loss) Income) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial (gain) loss	$ 1,924
Amortization of actuarial loss	(374)
Current year prior service cost	133
Amortization of prior service cost	(30)
Curtailments	(1)
Other Comprehensive Income Divestitures Adjustment Before Tax	(23)
Total recognized in other comprehensive income	1,629
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial (gain) loss	13
Amortization of prior service cost	0
Curtailments	4
Other Comprehensive Income Divestitures Adjustment Before Tax	0
Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss)	(6)
Total recognized in other comprehensive income	$ 11