Stock-Based Compensation Stock Unit Activity (Details) - Stock Compensation Plan shares in Millions	9 Months Ended
	Sep. 29, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested units, beginning of period (in shares) | shares	2.2
Units granted (in shares) | shares	0.6
Units vested (in shares) | shares	(0.6)
Units forfeited (in shares) | shares	(0.1)
Unvested units, end of period (in shares) | shares	2.1
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested units, beginning of period (in dollars per share) | $ / shares	$ 39.20
Units granted (in dollars per share) | $ / shares	57.04
Units vested (in dollars per share) | $ / shares	35.70
Units forfeited (in dollars per share) | $ / shares	43.65
Unvested units, end of period (in dollars per share) | $ / shares	$ 45.32