Debt (Textuals) (Details) (USD $)	0 Months Ended					0 Months Ended			0 Months Ended
	Oct. 19, 2012	Dec. 28, 2012	Sep. 18, 2012	Jun. 29, 2012	Mar. 30, 2012	Sep. 18, 2012 Four-Year Term Loan Credit Facility	Dec. 28, 2012 Four-Year Term Loan Credit Facility	Oct. 17, 2012 Four-Year Term Loan Credit Facility	Oct. 19, 2012 5.50% term notes, due March 2013	Oct. 19, 2012 5.00% term notes, due February 2013	Sep. 18, 2012 Senior Unsecured and Unsubordinated Notes [Member]	Sep. 18, 2012 Senior Unsecured and Unsubordinated Notes [Member] 2.50% term notes, due September 2015	Sep. 18, 2012 Senior Unsecured and Unsubordinated Notes [Member] 4.45% term notes, due September 2022
Debt Instrument [Line Items]
Debt Instrument, Face Amount								$ 250,000,000			$ 700,000,000	$ 350,000,000	$ 350,000,000
Debt Instrument, Unamortized Discount											1,000,000
Unamortized Debt Issuance Expense						1,000,000					5,000,000
Line of Credit Facility, Maximum Borrowing Capacity		1,500,000,000				350,000,000
Line of Credit Facility, Current Borrowing Capacity						250,000,000	250,000,000
Loss on early debt extinguishment	(19,000,000)
Line of Credit Facility, Periodic Payment Percentage						2.50%
Extinguishment of Debt, Amount									700,000,000	300,000,000
Line of Credit Facility Term						4 years
Debt Instrument, Covenant, Aggregate Principal Payment Amount			125,000,000
Weighted average interest rate (in hundredths)				0.72%
Commercial paper outstanding		$ 0			$ 0