Employees' Stock Incentive Plans Schedule of Unvested Stock Options and Related Information (Details)	12 Months Ended
	Dec. 29, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance | shares	11,827,142
Granted | shares	2,143,730
Vested | shares	(5,135,897)
Forfeited | shares	(1,067,058)
Ending balance | shares	7,767,917
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Options unvested at period start, weighted average grant date fair value (in dollars per share) | $ / shares	$ 8.36
Options granted, weighted average grant date fair value (in dollars per share) | $ / shares	10.26
Options vested, weighted average grant date fair value (in dollars per share) | $ / shares	5.99
Options forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	10.45
Options unvested at period end, weighted average grant date fair value (in dollars per share) | $ / shares	$ 10.16