Reorganization Of Businesses (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	$ 32	$ 13	$ 71	$ 36
Restructuring charges			78
Restructuring reversals no longer needed			(7)
Restructuring Reserve	61		61		35
Number of Employees Impacted By Reorganization of Business
Restructuring charges settled with cash			45
Cost Of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	8	3	16	6
Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	24	10	55	30
Employee Separation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	31			43
Number of voluntary applicants in business reorganization	130
Restructuring charges			77
Restructuring reversals no longer needed			(7)	(8)
Restructuring Reserve	57		57		31
Number of Employees Impacted By Reorganization of Business
Accrual for employee severance, initial payment in current year (in number of employees)			300
Restructuring charges in the period for total employee severance (in number of employees)			1,000
Restructuring charges in the period for indirect employees' severance (in number of employees)			500	700
Restructuring charges in the period for direct employees' severance (in number of employees)			500
Restructuring charges settled with cash			44
Number of employees expected to be paid (in number of employees)	700		700
Building Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges				1
Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	1		1
Restructuring charges			1
Restructuring reversals no longer needed			0
Restructuring Reserve	4		4		4
Number of Employees Impacted By Reorganization of Business
Restructuring charges settled with cash			1
Voluntary Applicants [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	$ 21