Equity Compensation - Fair Value (Details) - Options	12 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Assumptions (weighted average):
Risk-free interest rate (as a percent)	1.60%	1.80%	1.10%
Expected dividend yield (as a percent)	0.90%	1.00%	0.10%
Expected volatility (as a percent)	28.50%	35.70%	37.50%
Expected term (in years)	5 years 6 months	6 years	6 years