Debt and Credit Facilities (Narrative) (Details) (USD $)	3 Months Ended			9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 29, 2012	Jun. 30, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012 Scheduled To Mature On June Thirty Two Thousand Fourteen [Member]	Sep. 29, 2012 Scheduled To Mature On June Thirty Two Thousand Fourteen [Member]	May 31, 2012 Three Point Seven Five Zero Percent Senior Notes Due 2022 [Member]	May 31, 2012 Five Point Three Seven Five Percent Senior Notes Due November 2012 [Member]
Line of Credit Facility [Line Items]
Face principal amount of debt issued								$ 750,000,000
Debt instrument stated interest rate (percent)								3.75%	5.375%
Aggregate principal amount of debt to be redeemed	1,900,000,000			1,900,000,000					400,000,000
Debt redemption aggregate purchase price		408,000,000
Loss from the extinguishment of long-term debt	0	6,000,000	0	6,000,000	81,000,000
Unsecured syndicated revolving credit facility						1,500,000,000	1,500,000,000
Aggregate credit facility size, maximum						2,000,000,000	2,000,000,000
Additional borrowings under line of credit agreement						$ 0	$ 0