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Investments (Tables)
 6 Months Ended
Jan. 24, 2015
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):
January 24, 2015
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
Fixed income securities:
 
 
 
 
 
 
 
U.S. government securities
$
30,302

 
$
53

 
$
(1
)
 
$
30,354

U.S. government agency securities
2,324

 
3

 
(1
)
 
2,326

Non-U.S. government and agency securities
1,108

 
1

 
—

 
1,109

Corporate debt securities
11,180

 
61

 
(28
)
 
11,213

U.S. agency mortgage-backed securities
1,360

 
15

 
—

 
1,375

Total fixed income securities
46,274

 
133

 
(30
)
 
46,377

Publicly traded equity securities
1,296

 
562

 
(10
)
 
1,848

Total
$
47,570

 
$
695

 
$
(40
)
 
$
48,225


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

Non-U.S. government and agency securities include agency and corporate debt securities that are guaranteed by non-U.S. governments.
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):
 
Three Months Ended
 
Six Months Ended
 
January 24,
2015
 
January 25,
2014
 
January 24,
2015
 
January 25,
2014
Gross realized gains
$
92

 
$
97

 
$
113

 
$
192

Gross realized losses
(23
)
 
(15
)
 
(37
)
 
(27
)
Total
$
69

 
$
82

 
$
76

 
$
165

The following table presents the realized net gains (losses) related to the Company’s available-for-sale investments by security type (in millions):
 
Three Months Ended
 
Six Months Ended
 
January 24,
2015
 
January 25,
2014
 
January 24,
2015
 
January 25,
2014
Net gains (losses) on investments in publicly traded equity securities
$
60

 
$
69

 
$
56

 
$
144

Net gains on investments in fixed income securities
9

 
13

 
20

 
21

Total
$
69

 
$
82

 
$
76

 
$
165
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 January 24, 2015 and July 26, 2014 (in millions):
 
UNREALIZED LOSSES
LESS THAN 12 MONTHS
 
UNREALIZED LOSSES
12 MONTHS OR GREATER
 
TOTAL
January 24, 2015
Fair Value
 
Gross
Unrealized
Losses
 
Fair Value
 
Gross
Unrealized
Losses
 
Fair Value
 
Gross 
Unrealized 
Losses
Fixed income securities:
 
 
 
 
 
 
 
 
 
 
 
U.S. government securities 
$
4,558

 
$
(1
)
 
$
—

 
$
—

 
$
4,558

 
$
(1
)
U.S. government agency securities
854

 
(1
)
 
—

 
—

 
854

 
(1
)
Corporate debt securities
3,952

 
(25
)
 
363

 
(3
)
 
4,315

 
(28
)
Total fixed income securities
9,364

 
(27
)

363


(3
)

9,727


(30
)
Publicly traded equity securities
119

 
(10
)
 
1

 
—

 
120

 
(10
)
Total
$
9,483

 
$
(37
)
 
$
364

 
$
(3
)
 
$
9,847

 
$
(40
)
 
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
)
Maturities of Fixed Income Securities
The following table summarizes the maturities of the Company’s fixed income securities at January 24, 2015 (in millions): 
 
Amortized Cost
 
Fair Value
Less than 1 year
$
15,355

 
$
15,362

Due in 1 to 2 years
14,963

 
14,995

Due in 2 to 5 years
14,383

 
14,431

Due after 5 years
1,573

 
1,589

Total
$
46,274

 
$
46,377
Equity Method and Cost Method Investments
For such investments that were accounted for under the equity and cost method as of January 24, 2015 and July 26, 2014, the amounts are summarized in the following table (in millions):
 
January 24,
2015
 
July 26,
2014
Equity method investments
$
541

 
$
630

Cost method investments
316

 
269

Total
$
857

 
$
899