Debt and Credit Agreements (Convertible Debentures) (Details) (Convertible Debt [Member], USD $)	12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Dec. 28, 2001
Debt Instrument [Line Items]
Face amount of debt issued			$ 564,000,000
Initial offering price of zero coupon convertible debentures			462,000,000
Outstanding debentures	4,000,000	9,000,000
Yearly rate of accretion in value from the date of issuance of zero coupon convertible debentures (in hundredths)	1.00%	2.10%
Zero coupon convertible debentures deduction from the interest rate of US Treasury Note (in hundredths)	2.80%
Exchange rate per $1000 principal amount	106.48
Exchange amount of zero coupon convertible debenture into common stock	1,000
Face value of debentures that were converted during the period	6,000,000	21,000,000
Number of shares of common stock that debentures were converted to during the period	1,000,000	2,000,000
Face value of zero coupon convertible debentures outstanding at period end	$ 4,000,000
The number of shares the debentures are convertible into.	401,000
Minimum [Member]
Debt Instrument [Line Items]
Yearly rate of accretion in value from the date of issuance of zero coupon convertible debentures (in hundredths)	1.00%
Maximum [Member]
Debt Instrument [Line Items]
Yearly rate of accretion in value from the date of issuance of zero coupon convertible debentures (in hundredths)	3.00%