Reorganization Of Businesses (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012 employee	Oct. 01, 2011	Sep. 29, 2012 employee	Oct. 01, 2011 employee
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	$ 13	$ 10	$ 36	$ 35
Number of Employees Impacted By Reorganization of Business
Accrual for employee severance, initial payment in current year (in number of employees)			500
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)			500	400
Restructuring charges in the period for direct employees' severance (in number of employees)			200
Number of employees expected to be paid (in number of employees)	700		700
Reversals for accruals no longer needed			5
Cost Of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	3		6	3
Other Charges [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	10		30	32
Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges		2		15
Number of Employees Impacted By Reorganization of Business
Reversals for accruals no longer needed			(2)
Employee Separation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges		8		22
Number of Employees Impacted By Reorganization of Business
Reversals for accruals no longer needed			7	(2)
Impairment in Value of Asset [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges			1
Restructuring Reversal [Member]
Number of Employees Impacted By Reorganization of Business
Reversals for accruals no longer needed			$ (8)