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Cash Equivalents and Investments
 12 Months Ended
Jan. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Cash Equivalents and Investments Cash Equivalents and InvestmentsThe following is a summary of the Company’s cash equivalents, short-term investments, and long-term investments on the consolidated balance sheets (in thousands):
January 31, 2023
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair Value
Cash equivalents:
Money market funds$379,094 $— $— $379,094 
Commercial paper9,305 — (1)9,304 
Corporate notes and bonds6,902 1 — 6,903 
Certificates of deposit3,045 — (1)3,044 
Total cash equivalents398,346 1 (2)398,345 
Investments:
Corporate notes and bonds2,124,454 2,096 (23,470)2,103,080 
Commercial paper883,023 272 (1,947)881,348 
U.S. government and agency securities715,949 107 (12,220)703,836 
Certificates of deposit453,557 278 (1,110)452,725 
Total investments4,176,983 2,753 (38,747)4,140,989 
Total cash equivalents and investments$4,575,329 $2,754 $(38,749)$4,539,334 

January 31, 2022
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair Value
Cash equivalents:
Money market funds$722,492 $— $— $722,492 
Commercial paper77,795 1 (2)77,794 
U.S. government securities36,997 — (2)36,995 
Corporate notes and bonds7,950 — (1)7,949 
Total cash equivalents845,234 1 (5)845,230 
Investments:
Corporate notes and bonds2,610,010 91 (12,062)2,598,039 
Commercial paper884,376 81 (821)883,636 
U.S. government and agency securities439,449 28 (2,558)436,919 
Certificates of deposit104,108 4 (135)103,977 
Total investments4,037,943 204 (15,576)4,022,571 
Total cash equivalents and investments$4,883,177 $205 $(15,581)$4,867,801 

The Company included $19.4 million and $14.1 million of interest receivable in prepaid expenses and other current assets on the consolidated balance sheets as of January 31, 2023 and 2022, respectively. The Company did not recognize an allowance for credit losses against interest receivable as of January 31, 2023 and 2022 because such potential losses were not material.

As of January 31, 2023, the contractual maturities of the Company’s available-for-sale marketable debt securities did not exceed 36 months. The estimated fair values of available-for-sale marketable debt securities, by remaining contractual maturity, are as follows (in thousands):

January 31, 2023
Estimated
Fair Value
Due within 1 year$3,087,217 
Due in 1 year to 3 years1,073,023 
Total$4,160,240 
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 consolidated balance sheets (in thousands):

January 31, 2023
Less than 12 Months12 Months or GreaterTotal
Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses
Cash equivalents:
Commercial paper$9,304 $(1)$— $— $9,304 $(1)
Certificates of deposit3,044 (1)— — 3,044 (1)
Total cash equivalents12,348 (2)— — 12,348 (2)
Investments:
Corporate notes and bonds899,655 (8,521)736,431 (14,949)1,636,086 (23,470)
U.S. government and agency securities387,207 (3,157)232,771 (9,063)619,978 (12,220)
Commercial paper561,793 (1,947)— — 561,793 (1,947)
Certificates of deposit256,428 (1,110)— — 256,428 (1,110)
Total investments2,105,083 (14,735)969,202 (24,012)3,074,285 (38,747)
Total cash equivalents and investments$2,117,431 $(14,737)$969,202 $(24,012)$3,086,633 $(38,749)

January 31, 2022
Less than 12 Months12 Months or GreaterTotal
Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses		Fair ValueGross
Unrealized
Losses
Cash equivalents:
Commercial paper$55,819 $(2)$— $— $55,819 $(2)
U.S. government securities36,995 (2)— — 36,995 (2)
Corporate notes and bonds7,629 (1)— — 7,629 (1)
Total cash equivalents100,443 (5)— — 100,443 (5)
Investments:
Corporate notes and bonds2,378,956 (12,044)8,935 (18)2,387,891 (12,062)
Commercial paper653,827 (821)— — 653,827 (821)
U.S. government and agency securities334,980 (2,558)— — 334,980 (2,558)
Certificates of deposit49,118 (135)— — 49,118 (135)
Total investments3,416,881 (15,558)8,935 (18)3,425,816 (15,576)
Total cash equivalents and investments$3,517,324 $(15,563)$8,935 $(18)$3,526,259 $(15,581)

For available-for-sale marketable debt securities with unrealized loss positions, the Company does not intend to sell these securities and it is more likely than not that the Company will hold these securities until maturity or a recovery of the cost basis. The decline in fair value of these securities due to credit related factors was not material as of January 31, 2023 and 2022.

See Note 5 for information regarding the Company’s strategic investments.