Asset Impairment, Exit, Implementation And Integration Costs (Movement In The Severance Liability And Details Of Asset Impairment And Exit Costs) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Severance liability beginning balance	$ 156	$ 26
Charges, net	61	222
Cash spent	(134)	(44)
Other	(46)	(48)
Severance liability ending balance	37	156
Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance liability beginning balance	156	26
Charges, net	(7)	154
Cash spent	(112)	(24)
Other	0	0
Severance liability ending balance	37	156
Other [Member]
Restructuring Cost and Reserve [Line Items]
Severance liability beginning balance	0	0
Charges, net	68	68
Cash spent	(22)	(20)
Other	(46)	(48)
Severance liability ending balance	$ 0	$ 0