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Cash, Cash Equivalents and Short-Term Investments (Tables)
 3 Months Ended
Mar. 02, 2012
Cash, Cash Equivalents, and Short Term Investments Disclosure [Abstract]  
Cash Cash Equivalents and Short term Investments text block
Cash, cash equivalents and short-term investments consisted of the following as of March 2, 2012 (in thousands):
 
Amortized
Cost
 
Unrealized
Gains
 
Unrealized
Losses
 
Estimated
Fair Value
Current assets:
 
 
 
 
 
 
 
Cash
$
224,267

 
$
—

 
$
—

 
$
224,267

Cash equivalents:
 
 
 
 
 
 
 
Corporate bonds and commercial paper
2,250

 
—

 
—

 
2,250

Money market mutual funds and repurchase agreements
508,013

 
—

 
—

 
508,013

Time deposits
55,325

 
—

 
—

 
55,325

U.S. Treasury securities
11,409

 
—

 
(1
)
 
11,408

Total cash equivalents
576,997

 
—

 
(1
)
 
576,996

Total cash and cash equivalents
801,264

 
—

 
(1
)
 
801,263

Short-term fixed income securities:
 
 
 
 
 
 
 
Corporate bonds and commercial paper
1,039,166

 
10,774

 
(605
)
 
1,049,335

Foreign government securities
3,249

 
25

 
—

 
3,274

Municipal securities
120,696

 
102

 
(1
)
 
120,797

U.S. agency securities
436,659

 
2,205

 
(36
)
 
438,828

U.S. Treasury securities
333,070

 
1,187

 
(33
)
 
334,224

Subtotal
1,932,840

 
14,293

 
(675
)
 
1,946,458

Marketable equity securities
10,533

 
7,864

 
—

 
18,397

Total short-term investments
1,943,373

 
22,157

 
(675
)
 
1,964,855

Total cash, cash equivalents and short-term investments
$
2,744,637

 
$
22,157

 
$
(676
)
 
$
2,766,118


Cash, cash equivalents and short-term investments consisted of the following as of December 2, 2011 (in thousands):
 
Amortized
Cost
 
Unrealized
Gains
 
Unrealized
Losses
 
Estimated
Fair Value
Current assets:
 
 
 
 
 
 
 
Cash
$
261,206

 
$
—

 
$
—

 
$
261,206

Cash equivalents:
 

 
 
 
 
 
 

Corporate bonds and commercial paper
15,948

 
—

 
—

 
15,948

Money market mutual funds and repurchase agreements
687,152

 
—

 
—

 
687,152

Time deposits
15,694

 
—

 
—

 
15,694

U.S. agency securities
2,500

 
—

 
—

 
2,500

U.S. Treasury securities
7,000

 
—

 
—

 
7,000

Total cash equivalents
728,294

 
—

 
—

 
728,294

Total cash and cash equivalents
989,500

 
—

 
—

 
989,500

Short-term fixed income securities:
 
 
 
 
 
 
 

Corporate bonds and commercial paper
1,109,674

 
6,533

 
(4,670
)
 
1,111,537

Foreign government securities
7,280

 
43

 
—

 
7,323

Municipal securities
106,255

 
104

 
(4
)
 
106,355

U.S. agency securities
374,514

 
1,496

 
(117
)
 
375,893

U.S. Treasury securities
307,181

 
1,640

 
(4
)
 
308,817

Subtotal
1,904,904

 
9,816

 
(4,795
)
 
1,909,925

Marketable equity securities
10,581

 
1,686

 
—

 
12,267

Total short-term investments
1,915,485

 
11,502

 
(4,795
)
 
1,922,192

Total cash, cash equivalents and short-term investments
$
2,904,985

 
$
11,502

 
$
(4,795
)
 
$
2,911,692
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities
The following table summarizes the fair value and gross unrealized losses related to available-for-sale securities, aggregated by investment category, that have been in an unrealized loss position for less than twelve months, as of March 2, 2012 and December 2, 2011 (in thousands):
 
2012
 
2011
 
Fair 
Value
 
Gross
Unrealized
Losses
 
Fair 
Value
 
Gross
Unrealized
Losses
Corporate bonds and commercial paper
$
137,135

 
$
(576
)
 
$
408,178

 
$
(4,438
)
Municipal securities
8,625

 
(1
)
 
17,125

 
(3
)
U.S. Treasury and agency securities
146,737

 
(70
)
 
133,857

 
(121
)
Total
$
292,497

 
$
(647
)
 
$
559,160

 
$
(4,562
)
 
The following table summarizes the fair value and gross unrealized losses related to available-for-sale securities, aggregated by investment category, that have been in a continuous unrealized loss position for more than twelve months, as of March 2, 2012 and December 2, 2011 (in thousands):
 
2012
 
2011
 
Fair 
Value
 
Gross
Unrealized
Losses
 
Fair 
Value
 
Gross
Unrealized
Losses
Corporate bonds and commercial paper
$
13,187

 
$
(29
)
 
$
22,918

 
$
(232
)
Municipal securities
—

 
—

 
2,668

 
(1
)
Total
$
13,187

 
$
(29
)
 
$
25,586

 
$
(233
)
Cost and Estimated Fair Value of Debt Securities
The following table summarizes the cost and estimated fair value of short-term fixed income securities classified as short-term investments based on stated effective maturities as of March 2, 2012 (in thousands):
 
Amortized
Cost
 
Estimated
Fair Value
Due within one year
$
914,746

 
$
916,557

Due between one and two years
496,450

 
500,531

Due between two and three years
418,018

 
423,287

Due after three years
103,626

 
106,083

Total
$
1,932,840

 
$
1,946,458