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Cash Equivalents and Investments (Tables)
 3 Months Ended
Apr. 30, 2024
Investments, Debt and Equity Securities [Abstract]  
Schedule of Cash and Cash Equivalents
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, 2024
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair Value
Cash equivalents:
Money market funds$492,568 $— $— $492,568 
U.S. government securities367,494 — (1)367,493 
Time deposits58,145 — — 58,145 
Commercial paper53,742 — (7)53,735 
Corporate notes and bonds34,423 1 (13)34,411 
Total cash equivalents1,006,372 1 (21)1,006,352 
Investments:
Corporate notes and bonds1,496,420 901 (6,658)1,490,663 
U.S. government and agency securities785,243 — (6,125)779,118 
Commercial paper528,809 37 (798)528,048 
Certificates of deposit331,079 153 (145)331,087 
Total investments3,141,551 1,091 (13,726)3,128,916 
Total cash equivalents and investments$4,147,923 $1,092 $(13,747)$4,135,268 

January 31, 2024
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair Value
Cash equivalents:
U.S. government securities$742,235 $1 $(2)$742,234 
Money market funds533,211 — — 533,211 
Time deposits56,263 — — 56,263 
Total cash equivalents1,331,709 1 (2)1,331,708 
Investments:
Corporate notes and bonds1,549,151 1,959 (3,394)1,547,716 
U.S. government and agency securities877,496 574 (4,653)873,417 
Commercial paper353,525 154 (131)353,548 
Certificates of deposit224,869 271 (15)225,125 
Total investments3,005,041 2,958 (8,193)2,999,806 
Total cash equivalents and investments$4,336,750 $2,959 $(8,195)$4,331,514 
Schedule of Debt Securities, Available-for-Sale
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, 2024
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair Value
Cash equivalents:
Money market funds$492,568 $— $— $492,568 
U.S. government securities367,494 — (1)367,493 
Time deposits58,145 — — 58,145 
Commercial paper53,742 — (7)53,735 
Corporate notes and bonds34,423 1 (13)34,411 
Total cash equivalents1,006,372 1 (21)1,006,352 
Investments:
Corporate notes and bonds1,496,420 901 (6,658)1,490,663 
U.S. government and agency securities785,243 — (6,125)779,118 
Commercial paper528,809 37 (798)528,048 
Certificates of deposit331,079 153 (145)331,087 
Total investments3,141,551 1,091 (13,726)3,128,916 
Total cash equivalents and investments$4,147,923 $1,092 $(13,747)$4,135,268 

January 31, 2024
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair Value
Cash equivalents:
U.S. government securities$742,235 $1 $(2)$742,234 
Money market funds533,211 — — 533,211 
Time deposits56,263 — — 56,263 
Total cash equivalents1,331,709 1 (2)1,331,708 
Investments:
Corporate notes and bonds1,549,151 1,959 (3,394)1,547,716 
U.S. government and agency securities877,496 574 (4,653)873,417 
Commercial paper353,525 154 (131)353,548 
Certificates of deposit224,869 271 (15)225,125 
Total investments3,005,041 2,958 (8,193)2,999,806 
Total cash equivalents and investments$4,336,750 $2,959 $(8,195)$4,331,514 
Schedule of Available For Sale Securities Remaining Contractual Maturity The estimated fair values of available-for-sale marketable debt securities, classified as short-term or long-term investments on the Company’s condensed consolidated balance sheets, by remaining contractual maturity, are as follows (in thousands):
April 30, 2024
Estimated
Fair Value
Due within 1 year$2,200,935 
Due in 1 year to 3 years927,981 
Total$3,128,916 
Schedule of Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value
The following tables show the fair values of, and the gross unrealized losses on, the Company’s available-for-sale marketable debt securities, classified by the length of time that the securities have been in a continuous unrealized loss position and aggregated by investment type, on the condensed consolidated balance sheets (in thousands):

April 30, 2024
Less than 12 Months12 Months or GreaterTotal
Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses
Cash equivalents:
U.S. government securities$257,696 $(1)$— $— $257,696 $(1)
Commercial paper42,735 (7)— — 42,735 (7)
Corporate notes and bonds21,406 (13)— — 21,406 (13)
Total cash equivalents321,837 (21)— — 321,837 (21)
Investments:
Corporate notes and bonds974,840 (5,218)206,956 (1,440)1,181,796 (6,658)
U.S. government and agency securities628,114 (3,628)151,004 (2,497)779,118 (6,125)
Commercial paper422,472 (798)— — 422,472 (798)
Certificates of deposit109,602 (145)— — 109,602 (145)
Total investments2,135,028 (9,789)357,960 (3,937)2,492,988 (13,726)
Total cash equivalents and investments$2,456,865 $(9,810)$357,960 $(3,937)$2,814,825 $(13,747)
January 31, 2024
Less than 12 Months12 Months or GreaterTotal
Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses
Cash equivalents:
U.S. government securities$338,893 $(2)$— $— $338,893 $(2)
Total cash equivalents338,893 (2)— — 338,893 (2)
Investments:
Corporate notes and bonds625,766 (1,259)321,952 (2,135)947,718 (3,394)
U.S. government and agency securities525,408 (1,323)191,863 (3,330)717,271 (4,653)
Commercial paper172,422 (131)— — 172,422 (131)
Certificates of deposit71,813 (15)— — 71,813 (15)
Total investments1,395,409 (2,728)513,815 (5,465)1,909,224 (8,193)
Total cash equivalents and investments$1,734,302 $(2,730)$513,815 $(5,465)$2,248,117 $(8,195)