Share-Based Compensation, Common Stock Issuances, Redeemable Common Stock and Common Stock (Tables)

12 Months Ended

Dec. 30, 2017

Weighted-Average Assumptions for Options Granted

The weighted-average assumptions for options granted in fiscal years 2017, 2016 and 2015 are included in the following table.

	2017			2016			2015
Expected volatility		31.8	%		28.8	%		36.6	%
Expected dividends		—			—			—
Risk-free interest rate		1.9	%		1.5	%		1.6	%
Expected term (in years)	5.8			5.9			4.8

Summary of Options Outstanding

The summary of Options outstanding and changes during fiscal year 2017 are presented below.

														Weighted-
										Weighted-		Weighted-		Average
										Average		Average		Remaining
	Time			Performance			Total			Fair		Exercise		Contractual
	Options			Options			Options			Value		Price		Years
Outstanding at December 31, 2016		4,973,717			3,688,192			8,661,909		$	5.65	$	12.91
Granted		857,181			429,532			1,286,713		$	11.08	$	26.72
Exercised		(2,418,764	)		(2,359,435	)		(4,778,199	)	$	5.12	$	10.15
Forfeited		(402,582	)		(152,872	)		(555,454	)	$	7.54	$	19.94
Outstanding at December 30, 2017		3,009,552			1,605,417			4,614,969		$	7.47	$	18.79		7.2
Vested and exercisable at December 30, 2017		1,230,897			1,242,245			2,473,142		$	6.10	$	14.31		5.8

Summary of Nonvested Restricted Shares

The summary of nonvested RSUs outstanding and changes during fiscal year 2017 is presented below.

										Weighted-
										Average
	Time			Performance			Total			Fair
	RSUs			RSUs			RSUs			Value
Nonvested at December 31, 2016		637,336			242,273			879,609		$	17.68
Granted		607,432			296,456			903,888		$	29.77
Vested		(213,879	)		(213,695	)		(427,574	)	$	16.64
Forfeited		(121,597	)		(48,481	)		(170,078	)	$	20.76
Nonvested at December 30, 2017		909,292			276,553			1,185,845		$	26.79

Performance Shares [Member]

Summary of Nonvested Restricted Shares

The summary of nonvested Performance Shares outstanding and changes during fiscal year 2017 is presented below: 

	Performance Shares			Weighted- Average Fair Value
Nonvested at December 31, 2016		—		$	—
Granted		257,766		$	30.39
Vested		—		$	—
Forfeited		(16,453	)	$	30.39
Nonvested at December 30, 2017		241,313		$	30.39