Long-Term Debt and Financing Arrangements - Additional Information (Detail) (USD $)	9 Months Ended						9 Months Ended	1 Months Ended			9 Months Ended	1 Months Ended	9 Months Ended		1 Months Ended											3 Months Ended
	Oct. 01, 2011	Sep. 30, 2011	Aug. 01, 2011	Jul. 31, 2011	Jul. 02, 2011	Jan. 01, 2011	Oct. 01, 2011 Revolving Credit Facility	Mar. 31, 2011 Revolving Credit Facility Expirations	May 31, 2011 Notes payable due 2011	Oct. 01, 2011 Commercial Paper	Oct. 01, 2011 Maximum Committed Credit Facility	Mar. 31, 2011 Committed Credit Facility	Oct. 01, 2011 Committed Credit Facility	Mar. 11, 2011 Committed Credit Facility	Mar. 31, 2011 Amended Term Facility Termination	Oct. 01, 2011 Notes payable due 2012	Jan. 01, 2009 Notes payable due 2012 Interest Rate Contract	Oct. 01, 2011 Notes payable due 2013	Jan. 01, 2009 Notes payable due 2013 Interest Rate Contract	Oct. 01, 2011 Notes payable due 2014	Jan. 01, 2011 Notes payable due 2014 Interest Rate Contract	Oct. 01, 2011 Notes payable due 2016	Jan. 01, 2011 Notes payable due 2016 Interest Rate Contract	Oct. 01, 2011 Convertible notes payable due in 2012	Oct. 01, 2011 Convertible Preferred Units	Oct. 01, 2011 Convertible Notes Payable	Dec. 31, 2011 Credit Facility	Oct. 01, 2011 Maximum
Debt Instrument [Line Items]
Repayment of outstanding revolving credit facility							$ 198,000,000
Commercial Paper Program, Total			2,000,000,000		1,500,000,000
Line of credit facility, borrowing capacity		1,000,000,000		1,250,000,000
Lince of credit facility, maturity period	364 days
Line of credit facility, borrowing capacity																											750,000,000
Amount of credit facility, termination date	2012-07										2015-03-11
Repayment of Notes Payable									400,000,000
Commercial Paper, Outstanding	560,900,000					1,600,000				547,200,000
Credit facility, maturity period												4 years
Amount of credit facility														1,200,000,000
Amount of credit facility, foreign currency sublimit														400,000,000
Credit facility, borrowing description													Borrowings under the Credit Agreement may include U.S. Dollars up to the $1.2 billion commitment or in Euro or Pounds Sterling subject to a foreign currency sublimit of $400.0 million and bear interest at a floating rate dependent upon the denomination of the borrowing. Repayments must be made on March 11, 2015 or upon an earlier termination date of the Credit Agreement, at the election of the Company.
Amount of credit facility, terminated or expired								700,000,000							800,000,000
Debt instrument, face amount																	200,000,000		250,000,000		300,000,000		300,000,000	320,000,000
Unamortized gain on the terminated swap and fair value adjustment of the new swap																5,500,000		11,100,000
Unamortized discount on the notes																		200,000
Long-term debt fair value adjustment																				9,600,000		21,100,000
Fair value adjustment of swap																				$ 5,100,000		$ 10,500,000
Outstanding stock warrants																									4,900,000			4,938,624
Debt instrument, Conversion features																										15.6165
Debt instrument, Conversion Price	$ 74.78					$ 75.00																			$ 86.10	$ 64.04