Share-Based Compensation - Restricted stock units payable in stock and cash (Details) shares in Thousands	12 Months Ended
	Dec. 30, 2017 $ / shares shares
Restricted Stock Units Payable in Stock
Number of Shares/Units
Outstanding at beginning of year, nonvested (in shares) | shares	797
Granted | shares	154
Vested | shares	(252)
Forfeited | shares	(31)
Outstanding at end of year, nonvested (in shares) | shares	668
Weighted-Average Grant Date Fair Value
Outstanding at beginning of year, nonvested (in dollars per share) | $ / shares	$ 35.94
Granted | $ / shares	49.57
Vested | $ / shares	(32.07)
Forfeited | $ / shares	(35.42)
Outstanding at end of year, nonvested (in dollars per share) | $ / shares	$ 40.55
Restricted Stock Units Payable in Cash
Number of Shares/Units
Outstanding at beginning of year, nonvested (in shares) | shares	1,444
Granted | shares	310
Vested | shares	(378)
Forfeited | shares	(113)
Outstanding at end of year, nonvested (in shares) | shares	1,263
Weighted-Average Grant Date Fair Value
Outstanding at beginning of year, nonvested (in dollars per share) | $ / shares	$ 36.33
Granted | $ / shares	49.65
Vested | $ / shares	(31.57)
Forfeited | $ / shares	(39.33)
Outstanding at end of year, nonvested (in dollars per share) | $ / shares	$ 40.75