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Investments (Tables)
 12 Months Ended
Jul. 26, 2014
Investments, Debt and Equity Securities [Abstract]  
Summary Of Available-For-Sale Investments
The following tables summarize the Company’s available-for-sale investments (in millions):
July 26, 2014
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
Fixed income securities:
 
 
 
 
 
 
 
U.S. government securities
$
31,717

 
$
29

 
$
(12
)
 
$
31,734

U.S. government agency securities
1,062

 
1

 
—

 
1,063

Non-U.S. government and agency securities
860

 
2

 
(1
)
 
861

Corporate debt securities
9,092

 
74

 
(7
)
 
9,159

U.S. agency mortgage-backed securities
574

 
5

 
—

 
579

Total fixed income securities
43,305

 
111

 
(20
)
 
43,396

Publicly traded equity securities
1,314

 
648

 
(10
)
 
1,952

Total
$
44,619

 
$
759

 
$
(30
)
 
$
45,348

 
 
 
 
 
 
 
 
July 27, 2013
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
Fixed income securities:
 
 
 
 
 
 
 
U.S. government securities
$
27,814

 
$
22

 
$
(13
)
 
$
27,823

U.S. government agency securities
3,083

 
7

 
(1
)
 
3,089

Non-U.S. government and agency securities
1,094

 
3

 
(2
)
 
1,095

Corporate debt securities
7,876

 
55

 
(50
)
 
7,881

Total fixed income securities
39,867

 
87

 
(66
)
 
39,888

Publicly traded equity securities
2,063

 
738

 
(4
)
 
2,797

Total
$
41,930

 
$
825

 
$
(70
)
 
$
42,685
Gross Realized Gains And Gross Realized Losses Related To Available-For-Sale Investment
The following table presents the gross realized gains and gross realized losses related to the Company’s available-for-sale investments (in millions):
Years Ended
July 26, 2014
 
July 27, 2013
 
July 28, 2012
Gross realized gains
$
341

 
$
264

 
$
561

Gross realized losses
(41
)
 
(216
)
 
(460
)
Total
$
300

 
$
48

 
$
101

The following table presents the realized net gains related to the Company’s available-for-sale investments by security type (in millions):
Years Ended
July 26, 2014
 
July 27, 2013
 
July 28, 2012
Net gains on investments in publicly traded equity securities
$
253

 
$
17

 
$
43

Net gains on investments in fixed income securities
47

 
31

 
58

Total
$
300

 
$
48

 
$
101
Available-For-Sale Investments With Gross Unrealized Losses
The following tables present the breakdown of the available-for-sale investments with gross unrealized losses and the duration that those losses had been unrealized at July 26, 2014 and July 27, 2013 (in millions):
 
UNREALIZED LOSSES
LESS THAN 12 MONTHS
 
UNREALIZED LOSSES
12 MONTHS OR GREATER
 
TOTAL
July 26, 2014
Fair Value
 
Gross
Unrealized
Losses
 
Fair Value
 
Gross
Unrealized
Losses
 
Fair Value
 
Gross 
Unrealized 
Losses
Fixed income securities:
 
 
 
 
 
 
 
 
 
 
 
U.S. government securities 
$
7,676

 
$
(12
)
 
$
45

 
$
—

 
$
7,721

 
$
(12
)
Non-U.S. government and agency securities
361

 
(1
)
 
22

 
—

 
383

 
(1
)
Corporate debt securities
1,875

 
(3
)
 
491

 
(4
)
 
2,366

 
(7
)
Total fixed income securities
9,912

 
(16
)

558


(4
)

10,470


(20
)
Publicly traded equity securities
132

 
(10
)
 
—

 
—

 
132

 
(10
)
Total
$
10,044

 
$
(26
)
 
$
558

 
$
(4
)
 
$
10,602

 
$
(30
)
 
UNREALIZED LOSSES
LESS THAN 12 MONTHS
 
UNREALIZED LOSSES
12 MONTHS OR GREATER
 
TOTAL
July 27, 2013
Fair Value
 
Gross
Unrealized
Losses
 
Fair Value
 
Gross
Unrealized
Losses
 
Fair Value
 
Gross 
Unrealized 
Losses
Fixed income securities:
 
 
 
 
 
 
 
 
 
 
 
U.S. government securities 
$
7,865

 
$
(13
)
 
$
—

 
$
—

 
$
7,865

 
$
(13
)
U.S. government agency securities
294

 
(1
)
 
—

 
—

 
294

 
(1
)
Non-U.S. government and agency securities
432

 
(2
)
 
—

 
—

 
432

 
(2
)
Corporate debt securities
3,704

 
(50
)
 
4

 
—

 
3,708

 
(50
)
Total fixed income securities
12,295

 
(66
)
 
4

 
—

 
12,299

 
(66
)
Publicly traded equity securities
278

 
(4
)
 
—

 
—

 
278

 
(4
)
Total
$
12,573

 
$
(70
)
 
$
4

 
$
—

 
$
12,577

 
$
(70
)
Maturities of Fixed Income Securities
The following table summarizes the maturities of the Company’s fixed income securities at July 26, 2014 (in millions): 
 
Amortized Cost
 
Fair Value
Less than 1 year
$
15,444

 
$
15,457

Due in 1 to 2 years
13,449

 
13,484

Due in 2 to 5 years
13,711

 
13,743

Due after 5 years
701

 
712

Total
$
43,305

 
$
43,396
Equity Method Investments
 
July 26, 2014
 
July 27, 2013
Equity method investments
$
630

 
$
591

Cost method investments
269

 
242

Total
$
899

 
$
833