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Stock-Based Awards - Stock-Settled Restricted Stock Units (Details) - Stock-settled Restricted Stock Units [Member] - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Dec. 25, 2016
Dec. 27, 2015
Dec. 28, 2014
Restricted Stock Units (in shares):      
Unvested stock-settled restricted stock units at beginning of period 1,159    
Granted 482    
Vested (582)    
Forfeited (51)    
Unvested stock-settled restricted stock units at end of period 1,008 1,159  
Unvested stock-settled restricted stock units expected to vest at end of period 960    
Weighted Average Grant-Date Fair Value (in dollars per share):      
Unvested stock-settled restricted stock units at beginning of period $ 13    
Granted 13    
Vested 11    
Forfeited 14    
Unvested stock-settled restricted stock units at end of period 14 $ 13  
Unvested stock-settled restricted stock units expected to vest at end of period $ 14    
Restricted stock units vested, intrinsic value $ 7.3 $ 5.5 $ 5.8
Five-year vesting [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period   5 years