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 6 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 27, 2015
Jun. 28, 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 effects 0 0 0 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) 0 0 0 0
Ending Balance 1 1 1 1
Unrealized gains (losses) on cash flow hedges:        
Beginning balance (13) (4) (6) (3)
Unrealized gains (losses) arising during the period, net of tax effects 3 3 (8) 0
Reclassification adjustment for (gains) losses realized and included in net loss, net of tax effects 4 1 8 3
Total other comprehensive income (loss) 7 4 0 3
Ending balance (6) 0 (6) 0
Total:        
Beginning balance (12) (3) (5) (2)
Unrealized gains (losses) arising during the period, net of tax effects 3 3 (8) 0
Reclassification adjustment for (gains) losses realized and included in net loss, net of tax effects 4 1 8 3
Total other comprehensive income (loss) 7 4 0 3
Ending balance $ (5) $ 1 $ (5) $ 1