Schedule I - Condensed Financial Information of Registrant (Details) - Parent Company Statement of Comprehensive Income (Loss) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 28, 2014
Sep. 28, 2014
Jun. 29, 2014
Mar. 30, 2014
Dec. 29, 2013
Sep. 29, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 28, 2014
Dec. 29, 2013
Dec. 30, 2012
Schedule I - Condensed Financial Information of Registrant (Details) - Parent Company Statement of Comprehensive Income (Loss) [Line Items]                      
Net income (loss) $ (24,719) $ (10,846) $ (11,974) $ (22,495) $ (23,698) $ (36,904) $ (3,231) $ (14,435) $ (70,034) $ (78,268) $ 24,384
Net foreign currency translation gain (loss)                 354 (1,350) (1,057)
Gain (loss) on recovery from impaired investments                   (1,200) 1,200
Net unrecognized loss on the Defined Benefit Plan                 (51)    
Net unrealized hedge gain (loss) arising during the period                 (7,623) 15,714 741
Net gain reclassified into earnings for revenue hedges (ineffective portion)                    [1] (2,415) [1]    [1]
Net unrealized gain on cash flow hedges                 1,428 1 1
Other comprehensive income (loss), net of tax                 1,731 (2,549) 144
Total comprehensive income (loss)                 (68,303) (80,817) 24,528
Less: Comprehensive income attributable to noncontrolling interest                     (503)
Comprehensive income (loss) attributable to Spansion Inc. common stockholders                 (68,303) (80,817) 25,031
Cash Flow Hedging [Member]                      
Schedule I - Condensed Financial Information of Registrant (Details) - Parent Company Statement of Comprehensive Income (Loss) [Line Items]                      
Net gain (loss) reclassification adjustmen from AOCI                 (978) (13,298) (740)
Expense Hedges [Member]                      
Schedule I - Condensed Financial Information of Registrant (Details) - Parent Company Statement of Comprehensive Income (Loss) [Line Items]                      
Net gain (loss) reclassification adjustmen from AOCI                 $ 10,029    
[1] Classified in interest income and other, net