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Cash Equivalents and Investments (Tables)
3 Months Ended
Apr. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of Cash Equivalents and Investments
The following is a summary of the Company’s cash equivalents, short-term investments, and long-term investments on the condensed consolidated balance sheets (in thousands):
April 30, 2021
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Estimated
Fair Value
Cash equivalents:
Money market funds$327,357 $— $— $327,357 
Commercial paper95,596 — (6)95,590 
Certificates of deposit36,000 — 36,001 
Corporate notes and bonds9,054 — (2)9,052 
Total cash equivalents468,007 (8)468,000 
Investments:
Corporate notes and bonds2,472,561 485 (812)2,472,234 
Commercial paper1,077,606 175 (38)1,077,743 
U.S. government and agency securities681,211 170 (36)681,345 
Certificates of deposit232,036 69 (1)232,104 
Total investments4,463,414 899 (887)4,463,426 
Total cash equivalents and investments$4,931,421 $900 $(895)$4,931,426 

January 31, 2021
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Estimated
Fair Value
Cash equivalents:
Money market funds$334,891 $— $— $334,891 
Commercial paper242,040 (5)242,037 
Corporate notes and bonds58,969 (2)58,970 
U.S. government securities23,700 — — 23,700 
Certificates of deposit23,500 — 23,503 
Total cash equivalents683,100 (7)683,101 
Investments:
Corporate notes and bonds2,287,006 628 (481)2,287,153 
U.S. government and agency securities1,016,059 250 (46)1,016,263 
Commercial paper711,389 85 (102)711,372 
Certificates of deposit238,278 97 (1)238,374 
Total investments4,252,732 1,060 (630)4,253,162 
Total cash equivalents and investments$4,935,832 $1,068 $(637)$4,936,263 
Schedule of Cash Equivalents and Investments
The following is a summary of the Company’s cash equivalents, short-term investments, and long-term investments on the condensed consolidated balance sheets (in thousands):
April 30, 2021
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Estimated
Fair Value
Cash equivalents:
Money market funds$327,357 $— $— $327,357 
Commercial paper95,596 — (6)95,590 
Certificates of deposit36,000 — 36,001 
Corporate notes and bonds9,054 — (2)9,052 
Total cash equivalents468,007 (8)468,000 
Investments:
Corporate notes and bonds2,472,561 485 (812)2,472,234 
Commercial paper1,077,606 175 (38)1,077,743 
U.S. government and agency securities681,211 170 (36)681,345 
Certificates of deposit232,036 69 (1)232,104 
Total investments4,463,414 899 (887)4,463,426 
Total cash equivalents and investments$4,931,421 $900 $(895)$4,931,426 

January 31, 2021
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Estimated
Fair Value
Cash equivalents:
Money market funds$334,891 $— $— $334,891 
Commercial paper242,040 (5)242,037 
Corporate notes and bonds58,969 (2)58,970 
U.S. government securities23,700 — — 23,700 
Certificates of deposit23,500 — 23,503 
Total cash equivalents683,100 (7)683,101 
Investments:
Corporate notes and bonds2,287,006 628 (481)2,287,153 
U.S. government and agency securities1,016,059 250 (46)1,016,263 
Commercial paper711,389 85 (102)711,372 
Certificates of deposit238,278 97 (1)238,374 
Total investments4,252,732 1,060 (630)4,253,162 
Total cash equivalents and investments$4,935,832 $1,068 $(637)$4,936,263 
Schedule of Available For Sale Securities Remaining Contractual Maturity The estimated fair values of available-for-sale debt securities, by remaining contractual maturity, are as follows (in thousands):
April 30, 2021
Estimated
Fair Value
Due within 1 year$3,426,394 
Due in 1 year to 3 years1,177,675 
Total$4,604,069