Reorganization Of Businesses (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	$ 28	$ 14	$ 39	$ 23
Restructuring Charges			46
Restructuring reversals no longer needed			(7)
Restructuring Reserve	42		42		35
Number of Employees Impacted By Reorganization of Business
Restructuring charges settled with cash			32
Cost Of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	9	3	9	3
Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	19	11	30	20
Employee Separation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	30		46	26
Restructuring Charges			46
Restructuring reversals no longer needed	(2)		(7)	(4)
Restructuring Reserve	39		39		31
Number of Employees Impacted By Reorganization of Business
Accrual for employee severance, initial payment in current year (in number of employees)			400
Restructuring charges in the period for total employee severance (in number of employees)			700
Restructuring charges in the period for indirect employees' severance (in number of employees)			300	400
Restructuring charges in the period for direct employees' severance (in number of employees)			400
Restructuring charges settled with cash			31
Number of employees expected to be paid (in number of employees)	600		600
Building Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges				1
Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			0
Restructuring reversals no longer needed			0
Restructuring Reserve	3		3		4
Number of Employees Impacted By Reorganization of Business
Restructuring charges settled with cash			$ 1