Retirement Plans (Schedule Of Amounts Recognized In Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Non-current liability	$ 4,112	$ 2,375
Amounts recognized in the consolidated balance sheet	(449)	(425)
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-current asset	0	0
Current liability	(32)	(32)
Non-current liability	(4,058)	(2,338)
Amounts recognized in the consolidated balance sheet	(4,090)	(2,370)
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Non-current asset	4	11
Current liability	(2)	(2)
Non-current liability	(54)	(37)
Amounts recognized in the consolidated balance sheet	$ (52)	$ (28)