Stock-Based Compensation (Schedule of Activity for Stock Options with Market Condition) (Details) - Performance Shares shares in Thousands	9 Months Ended
	Sep. 29, 2018 shares
Unvested
Beginning balance, shares	707
Granted, shares	573
Vested, shares	(31)
Canceled, shares	(429)
Ending balance, shares	820
Vested
Beginning balance, shares	83
Vested, shares	31
Exercised, shares	(78)
Canceled, shares	(10)
Ending balance, shares	26
Total
Beginning balance, shares	790
Granted, shares	573
Vested, shares	31
Exercised, shares	(78)
Canceled, shares	(439)
Ending balance, shares	846