Fair Value Measurements (Detail) (USD $)	Sep. 29, 2012	Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	$ 1,519,075,000	$ 1,012,122,000
Short-term investments	430,266,000	1,362,641,000
Restricted cash and investments	414,203,000	585,833,000
Total assets	2,363,544,000	2,965,667,000
Foreign exchange and commodity contracts	(1,340,000)	(21,434,000)
Commodity contracts		5,071,000
Fair value of short-term and long-term debt, including current maturities	4,890,000,000	4,760,000,000
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	1,519,075,000	1,012,122,000
Short-term investments	430,266,000	1,362,641,000
Restricted cash and investments	414,203,000	585,833,000
Total assets	2,363,544,000	2,960,596,000
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents
Short-term investments
Restricted cash and investments
Total assets		5,071,000
Foreign exchange and commodity contracts	(1,340,000)	(21,434,000)
Commodity contracts		5,071,000
Fair value of short-term and long-term debt, including current maturities	0	0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents
Short-term investments
Restricted cash and investments
Total assets
Foreign exchange and commodity contracts
Commodity contracts