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Fair Value Measurements (Tables)
6 Months Ended
Jul. 03, 2020
Fair Value Disclosures [Abstract]  
Schedule of Classification of Financial Assets Measured and Recorded at Fair Value on a Recurring Basis
The classifications within the fair value hierarchy of our financial assets that were measured and recorded at fair value on a recurring basis were as follows (in thousands):
 
June 30, 2020
 
Level 1
 
Level 2
 
Total
Commercial paper
$

 
$
239,930

 
$
239,930

Corporate bonds

 
672,868

 
672,868

U.S. Treasury and government-sponsored enterprises

 
90,352

 
90,352

Municipal bonds

 
28,380

 
28,380

Total debt securities available-for-sale

 
1,031,530

 
1,031,530

Money market funds
404,313

 

 
404,313

Certificates of deposit

 
52,283

 
52,283

Total financial assets carried at fair value
$
404,313

 
$
1,083,813

 
$
1,488,126

 
 
 
 
 
 
 
December 31, 2019
 
Level 1
 
Level 2
 
Total
Commercial paper
$

 
$
389,573

 
$
389,573

Corporate bonds

 
756,226

 
756,226

U.S. Treasury and government-sponsored enterprises

 
166,665

 
166,665

Total debt securities available-for-sale

 
1,312,464

 
1,312,464

Money market funds
2,467

 

 
2,467

Certificates of deposit

 
32,733

 
32,733

Total financial assets carried at fair value
$
2,467

 
$
1,345,197

 
$
1,347,664