Debt (Narrative) (Details) (USD $) Share data in Millions, unless otherwise specified			0 Months Ended		0 Months Ended				1 Months Ended		1 Months Ended				3 Months Ended	1 Months Ended
	Mar. 29, 2014	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] 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]	Mar. 29, 2014 4.50% Senior Notes Due June 2022 (2022 Notes) [Member]	Oct. 31, 2008 GO Zone Tax-Exempt Bonds Due October 2033 [Member]	Mar. 29, 2014 GO Zone Tax-Exempt Bonds Due October 2033 [Member]	Mar. 29, 2014 Standby Letters of Credit [Member]	Mar. 29, 2014 Bilateral Letters Of Credit [Member]	Mar. 29, 2014 2008 Warrants [Member] Class A [Member]	May 05, 2014 2008 Warrants [Member] Subsequent Event [Member] Class A [Member]
Debt Instrument [Line Items]
Amount available under credit facility	$ 1,000,000,000
Amount available for borrowing under credit facility	955,000,000
Letters of credit issued amount													45,000,000	145,000,000
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
Stock Issued During Period, Shares, Treasury Stock Reissued															8.9	2.8
Interest rate at period end							6.85%	6.60%				0.07%
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