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Corporate Investments and Funds Held For Clients (Tables) | 6 Months Ended
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Jun. 30, 2022
Investments Debt And Equity Securities [Abstract] |
Cash and Cash Equivalents and Investments | The tables below present our cash and cash equivalents, the funds held for clients’ cash and cash equivalents as well as the investments that were included within funds held for clients on the consolidated balance sheets:
|  | June 30, 2022 |
Type of issue |  | Amortized cost |  |  | Gross unrealized gains |  |  | Gross unrealized losses(1) |  |  | Fair value |
Cash and cash equivalents |  | $ | 279,039 |  |  | $ | — |  |  | $ | — |  |  | $ | 279,039 |
Funds held for clients' cash and cash equivalents |  |  | 3,158,071 |  |  |  | — |  |  |  | — |  |  |  | 3,158,071 |
Available-for-sale securities (2): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  |  | 103,094 |  |  |  | — |  |  |  | (517 | ) |  |  | 102,577 |
Certificates of deposit |  |  | 25,000 |  |  |  | — |  |  |  | — |  |  |  | 25,000 |
U.S. treasury securities |  |  | 139,192 |  |  |  | — |  |  |  | (1,659 | ) |  |  | 137,533 |
Total investments |  | $ | 3,704,396 |  |  | $ | — |  |  | $ | (2,176 | ) |  | $ | 3,702,220 |
|  | December 31, 2021 |
Type of issue |  | Amortized cost |  |  | Gross unrealized gains |  |  | Gross unrealized losses |  |  | Fair value |
Cash and cash equivalents |  | $ | 277,978 |  |  | $ | — |  |  | $ | — |  |  | $ | 277,978 |
Funds held for clients' cash and cash equivalents |  |  | 1,534,894 |  |  |  | — |  |  |  | — |  |  |  | 1,534,894 |
Available-for-sale securities (2): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  |  | 311,679 |  |  |  | — |  |  |  | — |  |  |  | 311,679 |
Certificates of deposit |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total investments |  | $ | 2,124,551 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,124,551 |
| (1) | These securities have been in an unrealized loss position for a period of less than 12 months.
| (2) | All available-for-sale securities were included within funds held for clients.
Summary of Expected Maturities of Available for Sale Securities | Expected maturities of available-for-sale securities at June 30, 2022 are as follows:
Expected maturity |  | Amortized cost |  |  | Fair value |
One year or less |  | $ | 128,094 |  |  | $ | 127,577 |
One year to five years |  | $ | 139,192 |  |  | $ | 137,533 |
Total available-for-sale securities |  | $ | 267,286 |  |  | $ | 265,110 |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 + Details
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