Reorganization Of Businesses (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012 employee	Apr. 02, 2011 employee
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	$ 9	$ 8
Number of Employees Impacted By Reorganization of Business
Accrual for employee severance, initial payment in current year (in number of employees)	100
Restructuring charges in the period for indirect employees' severance (in number of employees)	200
Number Of Employees Expected To Be Paid Remaining Accruals Within One Year	600
Restructuring charges in the period for total employee severance (in number of employees)		400
Restructuring Reserve Activity
Beginning balance	44	67
Additional Charges	12	9
Adjustments	(4)	(1)
Amount used	(15)	(14)
Ending balance	37	61
Cost Of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges		3
Other Charges [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges		5
Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	1
Restructuring Reserve Activity
Beginning balance	14	17
Additional Charges	0	0
Adjustments	0	0
Amount used	(2)	0
Ending balance	12	17
Employee Separation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	12	9
Restructuring Reserve Activity
Beginning balance	30	50
Additional Charges	12	9
Adjustments	(4)	(1)
Amount used	(13)	(14)
Ending balance	25	44
Restructuring Reversal [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization of business charges	$ 4	$ 1