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Income Taxes Income Taxes (Tables)
12 Months Ended
Jan. 26, 2014
Income Taxes [Abstract]  
Summary of Income Tax Contingencies [Table Text Block]
 
January 26,
2014
 
January 27,
2013
 
January 29,
2012
 
(In thousands)
Balance at beginning of period
$
220,543

 
$
138,262

 
$
121,034

Increases in tax positions for prior years

 
18,800

 
385

Decreases in tax positions for prior years
(714
)
 
(304
)
 
(293
)
Increases in tax positions for current year
22,787

 
67,764

 
22,181

Settlements

 

 

Lapse in statute of limitations
(4,878
)
 
(3,979
)
 
(5,045
)
Balance at end of period
$
237,738

 
$
220,543

 
$
138,262

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
 
Year Ended
 
January 26,
2014
 
January 27,
2013
 
January 29,
2012
 
(In thousands)
Tax expense computed at federal statutory rate
$
178,589

 
$
231,714

 
$
232,189

State income taxes, net of federal tax effect
1,608

 
1,048

 
2,302

Foreign tax rate differential
(93,831
)
 
(123,626
)
 
(142,071
)
U.S. federal R&D tax credit
(30,155
)
 
(29,294
)
 
(24,270
)
Stock-based compensation
8,900

 
11,876

 
10,983

Tax expense related to intercompany transaction
9,785

 
9,785

 
1,533

Other
(4,632
)
 
(2,000
)
 
1,640

Income tax expense
$
70,264

 
$
99,503

 
$
82,306

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
 
Year Ended
 
January 26,
2014
 
January 27,
2013
 
January 29,
2012
 
(In thousands)
Current income taxes:
 
 
 
 
 
Federal
$
7,896

 
$
7,506

 
$
7,099

State
1,234

 
1,016

 
789

Foreign
18,513

 
16,766

 
7,630

Total current
27,643

 
25,288

 
15,518

Deferred taxes:
 
 
 
 
 
Federal
17,070

 
28,143

 
25,111

State

 

 

Foreign
(1,640
)
 
3,717

 
(6,055
)
Total deferred
15,430

 
31,860

 
19,056

Charge in lieu of taxes attributable to employer stock option plans
27,191

 
42,355

 
47,732

Income tax expense
$
70,264

 
$
99,503

 
$
82,306

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
 
Year Ended
 
January 26,
2014
 
January 27,
2013
 
January 29,
2012
 
(In thousands)
Domestic
$
79,136

 
$
99,422

 
$
120,768

Foreign
431,118

 
562,617

 
542,628

Income before income tax
$
510,254

 
$
662,039

 
$
663,396

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
 
January 26,
2014
 
January 27,
2013
 
(In thousands)
Deferred tax assets:
 
Net operating loss carryforwards
$
81,629

 
$
84,156

Accruals and reserves, not currently deductible for tax purposes
131,932

 
121,644

Property, equipment and intangible assets
48,358

 
54,636

Research and other tax credit carryforwards
306,975

 
271,933

Stock-based compensation
33,135

 
34,187

Convertible debt
14,885

 

Gross deferred tax assets
616,914

 
566,556

Less: valuation allowance
(244,487
)
 
(224,774
)
Total deferred tax assets
$
372,427

 
$
341,782

Deferred tax liabilities:
 
 
 
Acquired intangibles
$
(33,244
)
 
$
(43,878
)
Unremitted earnings of foreign subsidiaries
(425,401
)
 
(383,591
)
Gross deferred tax liabilities
$
(458,645
)
 
$
(427,469
)
Net deferred tax liability
$
(86,218
)
 
$
(85,687
)