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Debt (Narrative) (Details) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified
 0 Months Ended 0 Months Ended 3 Months Ended 1 Months Ended 1 Months Ended
Dec. 28, 2013
Sep. 28, 2013
Oct. 15, 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]
Oct. 15, 2013
3.25% Convertible Senior Unsecured Notes Due October 15, 2013 [Member]
Common Class A [Member]
Dec. 28, 2013
3.25% Convertible Senior Unsecured Notes Due October 15, 2013 [Member]
Common Class A [Member]
Sep. 30, 2008
3.25% Convertible Senior Unsecured Notes Due October 15, 2013 [Member]
Common Class A [Member]
Sep. 27, 2008
2016 Notes [Member]
Jun. 30, 2012
2016 Notes [Member]
Prior To Credit Rating Adjustment [Member]
Jun. 30, 2012
2016 Notes [Member]
After Credit Rating Adjustment [Member]
Jun. 30, 2012
4.50% Senior Notes Due June 2022 (2022 Notes) [Member]
Dec. 28, 2013
4.50% Senior Notes Due June 2022 (2022 Notes) [Member]
Oct. 31, 2008
GO Zone Tax-Exempt Bonds Due October 2033 [Member]
Dec. 28, 2013
GO Zone Tax-Exempt Bonds Due October 2033 [Member]
Dec. 28, 2013
Standby Letters of Credit [Member]
Dec. 28, 2013
Bilateral Letters Of Credit [Member]
Debt Instrument [Line Items]                                
Amount available under credit facility $ 1,000,000,000                              
Amount available for borrowing under credit facility 964,000,000                              
Letters of credit issued amount                             36,000,000 146,000,000
Debt instrument, face amount       458,000,000             1,000,000,000          
Interest rate       3.25%       6.60%     4.50% 4.50%        
Repayments of Long-term Debt     458,000,000                          
Stock Issued During Period, Shares, Conversion of Convertible Securities         11.7                      
Stock Redeemed or Called During Period, Shares         11.7                      
Shares able to be purchased through warrants             27                  
Exercise price of warrants, per share             22.13                  
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           $ 22.13                    
Additional stock issuance if increase in share price of ten percent           2.5                    
Share Price           $ 33.47                    
Additional Stock Issuance Required if Warrants are Exercised at Price Equal to Period End Closing Share Price           9.2                    
Interest rate at period end                 6.85% 6.60%       0.05%    
Debt Instrument, Unamortized Discount 5,000,000 6,000,000                 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