Restructuring, Impairment And Integration Charges (Summary Of Productivity Plan Activity) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
2011 restructuring charges	$ 383
Productivity Plan Activity [Member]
Restructuring Cost and Reserve [Line Items]
2011 restructuring charges	383
Cash payments	(30)
Non-cash charges	(25)
Liability as of December 31, 2011	328
Severance And Other Employee Costs [Member]
Restructuring Cost and Reserve [Line Items]
2011 restructuring charges	327
Severance And Other Employee Costs [Member] | Productivity Plan Activity [Member]
Restructuring Cost and Reserve [Line Items]
2011 restructuring charges	327
Cash payments	(1)
Non-cash charges	(25)
Liability as of December 31, 2011	301
Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
2011 restructuring charges	56
Other Costs [Member] | Productivity Plan Activity [Member]
Restructuring Cost and Reserve [Line Items]
2011 restructuring charges	56
Cash payments	(29)
Liability as of December 31, 2011	$ 27