General form of registration statement for all companies including face-amount certificate companies

Earnings Per Share - Dilutive effects of share based awards (Details)

v3.8.0.1
Earnings Per Share - Dilutive effects of share based awards (Details) - shares
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 28, 2017
Sep. 29, 2016
Sep. 28, 2017
Sep. 29, 2016
Dec. 29, 2016
Dec. 31, 2015
Dec. 25, 2014
Stock options              
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]              
Anti-dilutive shares excluded from the computation of diluted earnings (per share) 11,664 1,903,466 717,685 2,332,976 2,003,651 1,856,579 1,536,690