Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) (Details) (Schedule of Accumulated Other Comprehensive Income (Loss))

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Accumulated Other Comprehensive Income (Loss) (Details) (Schedule of Accumulated Other Comprehensive Income (Loss)) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 26, 2015
Sep. 27, 2014
Sep. 26, 2015
Sep. 27, 2014
Unrealized gains (losses) on available-for-sale securities:        
Beginning Balance $ 1 $ 1 $ 1 $ 1
Unrealized gains (losses) arising during the period, net of tax (3) 0 (3) 0
Reclassification adjustment for (gains) losses realized and included in net loss, net of tax effects 0 0 0 0
Total other comprehensive income (loss) (3) 0 (3) 0
Ending Balance (2) 1 (2) 1
Unrealized gains (losses) on cash flow hedges:        
Beginning balance (6) 0 (6) (3)
Unrealized gains (losses) arising during the period, net of tax effects (13) (3) (21) (3)
Reclassification adjustment for (gains) losses realized and included in net loss, net of tax effects 6 1 14 4
Total other comprehensive income (loss) (7) (2) (7) 1
Ending balance (13) (2) (13) (2)
Total:        
Beginning balance (5) 1 (5) (2)
Unrealized gains (losses) arising during the period, net of tax effects (16) (3) (24) (3)
Reclassification adjustment for (gains) losses realized and included in net loss, net of tax effects 6 1 14 4
Total other comprehensive income (loss) (10) (2) (10) 1
Ending balance $ (15) $ (1) $ (15) $ (1)