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Debt (Narrative) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified |  |  |  |  | 1 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  | 1 Months Ended |  |  | 1 Months Ended |  | 0 Months Ended
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Sep. 28, 2013 | Sep. 29, 2012 | Sep. 28, 2013 3.25% Convertible Senior Unsecured Notes Due October 15, 2013 [Member] | Sep. 30, 2008 3.25% Convertible Senior Unsecured Notes Due October 15, 2013 [Member] | Sep. 30, 2008 3.25% Convertible Senior Unsecured Notes Due October 15, 2013 [Member] Common Class A [Member] | Sep. 28, 2013 3.25% Convertible Senior Unsecured Notes Due October 15, 2013 [Member] Common Class A [Member] | Jan. 01, 2011 3.25% Convertible Senior Unsecured Notes Due October 15, 2013 [Member] Accounting Standards Update 2010-11 [Member] | Oct. 02, 2010 3.25% Convertible Senior Unsecured Notes Due October 15, 2013 [Member] Accounting Standards Update 2010-11 [Member] | Sep. 29, 2012 2016 Notes [Member] Prior To Credit Rating Adjustment [Member] | Apr. 02, 2011 2016 Notes [Member] Prior To Credit Rating Adjustment [Member] | Sep. 29, 2012 2016 Notes [Member] After Credit Rating Adjustment [Member] | Apr. 02, 2011 2016 Notes [Member] After Credit Rating Adjustment [Member] | Jun. 30, 2012 4.50% Senior Notes Due June 2022 (2022 Notes) [Member] | Sep. 28, 2013 4.50% Senior Notes Due June 2022 (2022 Notes) [Member] | Sep. 29, 2012 4.50% Senior Notes Due June 2022 (2022 Notes) [Member] | Oct. 31, 2008 GO Zone Tax-Exempt Bonds Due October 2033 [Member] | Sep. 28, 2013 GO Zone Tax-Exempt Bonds Due October 2033 [Member] | Sep. 28, 2013 Standby Letters of Credit [Member] | Sep. 28, 2013 Bilateral Letters Of Credit [Member] | Oct. 15, 2013 3.25% Convertible Senior Unsecured Notes Due October 15, 2013 (2013 Notes) [Member] 3.25% Convertible Senior Unsecured Notes Due October 15, 2013 [Member] | Oct. 15, 2013 3.25% Convertible Senior Unsecured Notes Due October 15, 2013 (2013 Notes) [Member] 3.25% Convertible Senior Unsecured Notes Due October 15, 2013 [Member] Common Class A [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturities of debt in 2014 | $ 514,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturities of debt in 2015 | 12,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturities of debt in 2016 | 645,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturities of debt in 2017 | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturities of debt in 2018 | 120,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount available under credit facility | 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount available for borrowing under credit facility | 958,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit issued amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 42,000,000 | 146,000,000 |  |
Debt instrument, face amount |  |  |  | 458,000,000 |  |  |  |  |  |  |  |  |  |  | 1,000,000,000 |  |  |  |  |  |
Interest rate |  |  | 3.25% | 3.25% |  |  |  |  |  |  |  |  |  | 4.50% | 4.50% |  |  |  |  |  |
Debt instrument, interest rate, effective percentage |  |  |  |  |  |  |  | 8.26% |  |  |  |  |  |  |  |  |  |  |  |  |
Discount on note recognized from adoption of accounting standard |  |  |  |  |  |  |  | 92,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
After tax amount recorded to capital in excess of par value |  |  |  |  |  |  |  | 56,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Discount Accretion Term (years) |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax assets |  |  |  |  | 36,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Call options purchased in private transactions - purchase price |  |  |  |  | 94,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of class A stock that can be acquired through call options |  |  |  |  | 27 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option Indexed to Issuer's Equity, Strike Price |  |  |  |  | 16.78 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of warrants |  |  |  |  | 44,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares able to be purchased through warrants |  |  |  |  | 27 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrants, per share |  |  |  |  | 22.16 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sensitivity of increase in stock price that would result in the issuance of additional stock |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price factoring convertible note hedge and warrant transactions, per share |  |  |  |  |  | $ 22.16 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional stock issuance if increase in share price of 10% |  |  |  |  |  | 2.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Price |  |  |  |  |  | $ 28.60 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional Stock Issuance Required if Warrants are Exercised at Price Equal to Period End Closing Share Price |  |  |  |  |  | 6.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 458,000,000 |
Conversion of Convertible Securities, shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11.7
Stock Redeemed or Called During Period, Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11.7
Interest rate at period end |  |  |  |  |  |  |  |  | 6.85% | 7.35% | 6.60% | 6.85% |  |  |  |  | 0.07% |  |  |  |
Debt Instrument, Unamortized Discount | 6,000,000 | 28,000,000 |  |  |  |  |  |  |  |  |  |  |  |  | 5,000,000 |  |  |  |  |  |
Issue price percent of face value |  |  |  |  |  |  |  |  |  |  |  |  | 99.458% |  |  |  |  |  |  |  |
Proceeds from Issuance of Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |  | 995,000,000 |  |  |  |  |  |  |  |
Payments of Debt Issuance Costs |  |  |  |  |  |  |  |  |  |  |  |  | 9,000,000 |  |  |  |  |  |  |  |
Proceeds from the sale of Gulf Opportunity Zone tax-exempt bonds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000,000 |  |  |  |  |
Syntroleum Corporation Responsibility of Guarantee |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |
Syntroleum Corporation Maximum Guarantee Responsibility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000 |  |  |  |

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- Definition The exercise (or strike) price stated in the contract. The fixed price at which the option holder can purchase, in the case of a call option, or sell, in the case of a put option, on the underlying security. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6445032&loc=d3e90205-114008 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Price of a single share of a number of saleable stocks of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Number of shares issued during the period as a result of the conversion of convertible securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-30) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Number of stock bought back by the entity at the exercise price or redemption price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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