Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Significant Accounting Policies (Details) (Accumulated Other Comprehensive Income) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 26, 2015
Dec. 27, 2014
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance $ (412) $ 187 $ 544
Unrealized gains (losses) arising during the period, net of tax effects 1 (24)  
Reclassification adjustment for (gains) losses realized and included in net loss, net of tax effects 2 21  
Total other comprehensive income (loss) 3 (3) (3)
Ending balance 416 (412) 187
Unrealized gains (losses) on available-for-sale securities      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (1) 1  
Unrealized gains (losses) arising during the period, net of tax effects 0 (2)  
Reclassification adjustment for (gains) losses realized and included in net loss, net of tax effects 0 0  
Total other comprehensive income (loss) 0 (2)  
Ending balance (1) (1) 1
Unrealized gains (losses) on cash flow hedges      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (7) (6)  
Unrealized gains (losses) arising during the period, net of tax effects 1 (22)  
Reclassification adjustment for (gains) losses realized and included in net loss, net of tax effects 2 21  
Total other comprehensive income (loss) 3 (1)  
Ending balance (4) (7) (6)
Accumulated other comprehensive loss      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Beginning balance (8) (5) (2)
Total other comprehensive income (loss) 3 (3) (3)
Ending balance $ (5) $ (8) $ (5)