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Employee Stock Benefit Plans (Tables)
 12 Months Ended
Dec. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Stock Options, RSUs Activity
The following table summarizes the Company’s stock option and restricted stock unit activity during fiscal 2016:
 
Stock Options Outstanding
 
Restricted Stock Units Outstanding
 
Options
 
Weighted average
exercise price
 
Restricted
Stock  Units
 
Weighted Average
Grant-Date Fair Value
(In millions, except for per share data)
 
 
 
 
 
 
 
Outstanding at the beginning of year
11.6

 
$
22.15

 
4.3

 
$
26.98

Granted
—

 
$
19.28

 
2.1

 
$
26.13

Option exercised
(3.7
)
 
$
16.47

 
—

 
$
—

Shares released, net
—

 
$
—

 
(1.2
)
 
$
27.86

Cancelled and Forfeited
(0.3
)
 
$
27.05

 
(0.5
)
 
$
26.43

Outstanding at the end of year
7.6

 
$
24.60

 
4.7

 
$
26.40
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable [Table Text Block]
The following table summarizes information about stock options outstanding as of fiscal 2016 year end:
 
Number
Of  Shares
(in millions)
 
Weighted-
Average
Exercise  Price
per Share
 
Weighted-
Average
Remaining
Contractual Term
(in years)
 
Aggregate
Intrinsic
Value
(in millions)
Vested and expected to vest
7.6

 
$
24.59

 
2.70
 
$
44.8

Options exercisable
6.6

 
$
24.15

 
2.47
 
$
41.3
Schedule Of Restricted Stock Unit Activity
The following table summarizes information about restricted stock units outstanding as of fiscal 2016:
 
Number
Of  Shares Underlying Restricted Stock Units
(in millions)
 
Weighted-
Average
Remaining
Vesting Period
 (in years)
 
Aggregate
Fair Value
(in millions)
Vested and expected to vest
5.5

 
1.64
 
$
164.7
Schedule Of Stock-Based Compensation Expense, Net Of Tax, Related To Employee Stock-Based Compensation (For All Plans)
The following table summarizes stock-based compensation expense included in the Consolidated Statements of Income.
 
Fiscal Years
2016
 
2015
 
2014
(In millions)
 
 
 
 
 
Cost of sales
$
3.8

 
$
3.9

 
$
3.2

Research and development
9.1

 
8.7

 
6.8

Sales and marketing
8.3

 
9.1

 
7.6

General and administrative
31.4

 
28.4

 
25.8

Total operating expenses
48.8

 
46.2

 
40.2

Total stock-based compensation expense
$
52.6

 
$
50.1

 
$
43.4
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions
valued using the Black-Scholes option pricing model with the following weighted-average assumptions:
Fiscal Years
2016
 
2015
 
2014
Expected life of purchase
0.5 years

 
0.5 years

 
0.5 years

Expected stock price volatility
36.9
%
 
31.3
%
 
30.5
%
Risk free interest rate
0.41
%
 
0.08
%
 
0.07
%
Expected dividend yield
—

 
—

 
—
Employee Stock Option [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule Of Weighted-Average Assumptions Used In Stock Options Granted
For options granted during fiscal 2016, 2015 and 2014, the following weighted-average assumptions were used:
Fiscal Years
2016
 
2015
 
2014
Expected life of options
4.0 years

 
3.9 years

 
4.0 years

Expected stock price volatility
38
%
 
36
%
 
35
%
Risk free interest rate
1.49
%
 
1.26
%
 
1.29
%
Expected dividend yield
—

 
—

 
—
Market Based Restricted Stock Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule Of Weighted-Average Assumptions Used In Stock Options Granted
following weighted-average assumptions:
Fiscal Years
2016
2015
Expected life of Market-Based Restricted Stock Units
3.1 years

2.6 years

Expected stock price volatility
33.8
%
30.9
%
Risk free interest rate
0.9
%
0.9
%
Expected dividend yield
—

—