Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies (Details) (Accumulated Other Comprehensive Income)

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Significant Accounting Policies (Details) (Accumulated Other Comprehensive Income) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Unrealized gains (losses) on available-for-sale securities:      
Beginning balance $ 0 $ (1)  
Unrealized gains (losses) arising during the period, net of tax effects (1) 1 5
Reclassification adjustment for losses realized and included in net loss, net of tax effects 2 0 (4)
Total other comprehensive income (loss) 1 1 1
Ending balance 1 0 (1)
Unrealized gains (losses) on cash flow hedges:      
Beginning balance (3) (4)  
Unrealized gains (losses) arising during the period, net of tax effects (6) 1 (5)
Reclassification adjustment for losses realized and included in net loss, net of tax effects 6 0 (3)
Total other comprehensive income (loss) 0 1 (8)
Ending balance (3) (3) (4)
Total:      
Beginning balance (3) (5)  
Unrealized gains (losses) arising during the period, net of tax effects (7) 2  
Reclassification adjustment for losses realized and included in net loss, net of tax effects 8 0  
Total other comprehensive income (loss) 1 2 (6)
Ending balance $ (2) $ (3) $ (5)