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Employee Benefit Plans (Tables)
 12 Months Ended
Jul. 25, 2015
Compensation and Retirement Disclosure [Abstract]  
Summary Of Share-Based Compensation Expense
Share-based compensation expense consists primarily of expenses for stock options, stock purchase rights, restricted stock, and restricted stock units granted to employees. The following table summarizes share-based compensation expense (in millions):
Years Ended
July 25, 2015
 
July 26, 2014
 
July 27, 2013
Cost of sales—product
$
50

 
$
45

 
$
40

Cost of sales—service
157

 
150

 
138

Share-based compensation expense in cost of sales
207

 
195

 
178

Research and development
448

 
411

 
286

Sales and marketing
559

 
549

 
484

General and administrative
228

 
198

 
175

Restructuring and other charges
(2
)
 
(5
)
 
(3
)
Share-based compensation expense in operating expenses
1,233

 
1,153

 
942

Total share-based compensation expense
$
1,440

 
$
1,348

 
$
1,120

Income tax benefit for share-based compensation
$
373

 
$
324

 
$
285
Summary Of Share-Based Awards Available For Grant
A summary of share-based awards available for grant is as follows (in millions):
Years Ended
July 25, 2015
 
July 26, 2014
 
July 27, 2013
Balance at beginning of fiscal year
310

 
228

 
218

Restricted stock, stock units, and other share-based awards granted
(101
)
 
(98
)
 
(102
)
Share-based awards canceled/forfeited/expired
40

 
36

 
115

Additional shares reserved
—

 
135

 
—

Shares withheld for taxes and not issued
27

 
6

 
—

Other
—

 
3

 
(3
)
Balance at end of fiscal year
276

 
310

 
228
Summary Of Restricted Stock And Stock Unit Activity
A summary of the restricted stock and stock unit activity, which includes time-based and performance-based or market-based restricted stock units, is as follows (in millions, except per-share amounts):
 
Restricted Stock/
Stock Units
 
Weighted-Average
Grant Date Fair
Value per Share
 
Aggregate Fair  Value
UNVESTED BALANCE AT JULY 28, 2012
128

 
$
19.46

 
 
Granted and assumed
72

 
18.52

 
 
Vested
(46
)
 
20.17

 
$
932

Canceled/forfeited
(11
)
 
18.91

 
 
UNVESTED BALANCE AT JULY 27, 2013
143

 
18.80

 
 
Granted and assumed
72

 
20.85

 
 
Vested
(53
)
 
19.55

 
$
1,229

Canceled/forfeited
(13
)
 
18.61

 
 
UNVESTED BALANCE AT JULY 26, 2014
149

 
19.54

 
 
Granted and assumed
67

 
25.29

 
 
Vested
(57
)
 
19.82

 
$
1,517

Canceled/forfeited
(16
)
 
20.17

 
 
UNVESTED BALANCE AT JULY 25, 2015
143

 
$
22.08

 
 
Summary Of Stock Option Activity
A summary of the stock option activity is as follows (in millions, except per-share amounts):
 
STOCK OPTIONS OUTSTANDING
 
Number
Outstanding
 
Weighted-Average
Exercise Price per Share
BALANCE AT JULY 28, 2012
520

 
$
22.68

Assumed from acquisitions
10

 
0.77

Exercised
(154
)
 
18.51

Canceled/forfeited/expired
(100
)
 
22.18

BALANCE AT JULY 27, 2013
276

 
24.44

Assumed from acquisitions
6

 
3.60

Exercised
(78
)
 
18.30

Canceled/forfeited/expired
(17
)
 
27.53

BALANCE AT JULY 26, 2014
187

 
26.03

Assumed from acquisitions
1

 
2.60

Exercised
(71
)
 
21.15

Canceled/forfeited/expired
(14
)
 
29.68

BALANCE AT JULY 25, 2015
103

 
$
28.68
Summary Of Significant Ranges Of Outstanding And Exercisable Stock Options
The following table summarizes significant ranges of outstanding and exercisable stock options as of July 25, 2015 (in millions, except years and share prices):
 
 
STOCK OPTIONS OUTSTANDING
 
STOCK OPTIONS EXERCISABLE
Range of Exercise Prices
 
Number
Outstanding
 
Weighted-
Average
Remaining
Contractual
Life
(in Years)
 
Weighted-
Average
Exercise
Price per
Share
 
Aggregate
Intrinsic
Value
 
Number
Exercisable
 
Weighted-
Average
Exercise
Price per
Share
 
Aggregate
Intrinsic
Value
$   0.01 – 20.00
 
4

 
5.0
 
$
4.96

 
$
97

 
3

 
$
6.15

 
$
63

$ 20.01 – 25.00
 
19

 
0.3
 
23.03

 
101

 
19

 
23.03

 
101

$ 25.01 – 30.00
 
14

 
1.0
 
26.83

 
24

 
14

 
26.82

 
24

$ 30.01 – 35.00
 
66

 
1.1
 
32.16

 
—

 
66

 
32.16

 
—

Total
 
103

 
1.1
 
$
28.68

 
$
222

 
102

 
$
29.02

 
$
188
Schedule of Assumptions Used
The assumptions for the valuation of time-based RSUs and PRSUs are summarized as follows:

RESTRICTED STOCK UNITS
Years Ended
July 25, 2015

July 26, 2014

July 27, 2013
Number of shares granted (in millions)
55


56


64

Grant date fair value per share
$
25.30


$
20.61


$
18.39

Weighted-average assumptions/inputs:
 
 
 
 
 
   Expected dividend yield
2.9
%

3.1
%

3.0
%
   Range of risk-free interest rates
0.0% – 1.8%


0.0% – 1.7%


0.0% – 1.1%


 
PERFORMANCE RESTRICTED STOCK UNITS
Years Ended
July 25, 2015
 
July 26, 2014
 
July 27, 2013
Number of shares granted (in millions)
11

 
7

 
4

Grant date fair value per share
$
24.85

 
$
21.90

 
$
19.73

Weighted-average assumptions/inputs:
 
 
 
 
 
   Expected dividend yield
3.0
%
 
3.0
%
 
2.9
%
   Range of risk-free interest rates
0.0% – 1.8%

 
0.0% – 1.7%

 
0.1% – 0.7%

   Range of expected volatilities for index
14.3% – 70.0%

 
14.2% – 70.5%

 
18.3% – 78.3%
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions
The assumptions for the valuation of employee stock purchase rights are summarized as follows:
 
EMPLOYEE STOCK PURCHASE RIGHTS
Years Ended
July 25, 2015
 
July 26, 2014
 
July 27, 2013
Weighted-average assumptions:
 
 
 
 
 
   Expected volatility
26.0
%
 
25.1
%
 
28.7
%
   Risk-free interest rate
0.3
%
 
0.1
%
 
0.4
%
   Expected dividend
2.8
%
 
2.8
%
 
1.5
%
   Expected life (in years)
1.8

 
0.8

 
1.8

Weighted-average estimated grant date fair value per share
$
6.54

 
$
5.54

 
$
4.68