Employees' Stock Incentive Plans Schedule of Unvested Stock Options and Related Information (Details)	12 Months Ended
	Dec. 30, 2017 $ / shares shares
Roll-forward of Unvested Stock Options (in shares)
Beginning balance | shares	11,899,949
Granted | shares	1,579,040
Vested | shares	(1,001,730)
Forfeited | shares	(650,117)
Ending balance | shares	11,827,142
Weighted Average Grant Date Fair Value [Abstract]
Options unvested at period start, weighted average grant date fair value (in dollars per share) | $ / shares	$ 8.26
Weighted average grant date fair value (in dollars per share) | $ / shares	14.24
Options vested, weighted average grant date fair value (in dollars per share) | $ / shares	15.09
Options forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	9.89
Options unvested at period end, weighted average grant date fair value (in dollars per share) | $ / shares	$ 8.36