Retirement Plans (Pension Benefit Adjustments Recognized In Other Comprehensive (Loss) Income) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial (gain) loss	$ 1,494
Amortization of actuarial loss	(307)
Current year prior service cost	20
Amortization of prior service cost	(32)
Settlements	0
Total recognized in other comprehensive income	1,175
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial (gain) loss	24
Amortization of actuarial loss	0
Current year prior service cost	0
Amortization of prior service cost	0
Settlements	0
Total recognized in other comprehensive income	$ 24