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Corporate Investments And Funds Held For Clients (Tables) | 12 Months Ended
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Jun. 30, 2025
Corporate Investments And Funds Held For Clients [Abstract] |
Schedule of Debt Securities, Available-for-sale | Corporate investments and funds held for clients at June 30, 2025 and 2024 were as follows:
| June 30, 2025
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value (A)
Type of issue: |  |  |  |  |  |  |
Money market securities, cash and other cash equivalents | $ | 5,054.6 |  |  | $ | — |  |  | $ | — |  |  | $ | 5,054.6 |
Available-for-sale securities: |  |  |  |  |  |  |
Corporate bonds | 17,515.2 |  |  | 108.7 |  |  | (420.2) |  |  | 17,203.7 |
U.S. Treasury securities | 8,416.8 |  |  | 85.6 |  |  | (43.7) |  |  | 8,458.7 |
Canadian government obligations and Canadian government agency obligations | 1,972.0 |  |  | 16.4 |  |  | (32.4) |  |  | 1,956.0 |
Asset-backed securities | 1,837.8 |  |  | 22.6 |  |  | (15.5) |  |  | 1,844.9 |
U.S. government agency securities | 1,328.5 |  |  | 2.3 |  |  | (80.0) |  |  | 1,250.8 |
Canadian provincial bonds | 1,155.8 |  |  | 13.8 |  |  | (27.7) |  |  | 1,141.9 |
Other securities | 1,977.3 |  |  | 7.2 |  |  | (62.8) |  |  | 1,921.7 |
Total available-for-sale securities | 34,203.4 |  |  | 256.6 |  |  | (682.3) |  |  | 33,777.7 |
Total corporate investments and funds held for clients | $ | 39,258.0 |  |  | $ | 256.6 |  |  | $ | (682.3) |  |  | $ | 38,832.3 |
(A) Included within available-for-sale securities are corporate investments with fair values of $4,498.8 million and funds held for clients with fair values of $29,278.9 million. All available-for-sale securities are included in Level 2 of the fair value hierarchy.
| June 30, 2024 |  |
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value (B) |  |
Type of issue: |  |  |  |  |  |  |  |  |
Money market securities, cash and other cash equivalents | $ | 10,086.0 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,086.0 |  |  |
Available-for-sale securities: |  |  |  |  |  |  |  |  |
Corporate bonds | 16,833.3 |  |  | 11.5 |  |  | (944.8) |  |  | 15,900.0 |  |  |
U.S. Treasury securities | 7,701.2 |  |  | 9.0 |  |  | (164.5) |  |  | 7,545.7 |  |  |
Canadian government obligations and Canadian government agency obligations | 2,130.7 |  |  | 1.7 |  |  | (86.6) |  |  | 2,045.8 |  |  |
U.S. government agency securities | 1,645.0 |  |  | 0.5 |  |  | (140.6) |  |  | 1,504.9 |  |  |
Asset-backed securities | 1,394.9 |  |  | 3.9 |  |  | (43.0) |  |  | 1,355.8 |  |  |
Canadian provincial bonds | 1,116.3 |  |  | 2.3 |  |  | (56.2) |  |  | 1,062.4 |  |  |
Commercial mortgage-backed securities | 535.9 |  |  | — |  |  | (35.1) |  |  | 500.8 |  |  |
Other securities | 1,366.0 |  |  | 2.0 |  |  | (75.9) |  |  | 1,292.1 |  |  |
Total available-for-sale securities | 32,723.3 |  |  | 30.9 |  |  | (1,546.7) |  |  | 31,207.5 |  |  |
Total corporate investments and funds held for clients | $ | 42,809.3 |  |  | $ | 30.9 |  |  | $ | (1,546.7) |  |  | $ | 41,293.5 |  |  |
(B) Included within available-for-sale securities are corporate investments with fair values of $384.0 million and funds held for clients with fair values of $30,823.5 million. All available-for-sale securities were included in Level 2 of the fair value hierarchy.
Schedule of Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value | The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of June 30, 2025, are as follows:
| June 30, 2025
| Securities in unrealized loss position less than 12 months |  | Securities in unrealized loss position greater than 12 months |  | Total
| Gross Unrealized Losses |  | Fair Market Value |  | Gross Unrealized Losses |  | Fair Market Value |  | Gross Unrealized Losses |  | Fair Market Value
Corporate bonds | $ | (5.4) |  |  | $ | 690.4 |  |  | $ | (414.8) |  |  | $ | 10,218.8 |  |  | $ | (420.2) |  |  | $ | 10,909.2 |
U.S. Treasury securities | (0.8) |  |  | 732.2 |  |  | (42.9) |  |  | 1,801.7 |  |  | (43.7) |  |  | 2,533.9 |
Canadian government obligations and Canadian government agency obligations | (1.4) |  |  | 219.2 |  |  | (31.0) |  |  | 870.2 |  |  | (32.4) |  |  | 1,089.4 |
Asset-backed securities | (0.2) |  |  | 101.4 |  |  | (15.3) |  |  | 481.4 |  |  | (15.5) |  |  | 582.8 |
U.S. government agency securities | (0.1) |  |  | 8.0 |  |  | (79.9) |  |  | 1,093.8 |  |  | (80.0) |  |  | 1,101.8 |
Canadian provincial bonds | (0.8) |  |  | 44.3 |  |  | (26.9) |  |  | 588.8 |  |  | (27.7) |  |  | 633.1 |
Other securities | (1.5) |  |  | 168.4 |  |  | (61.3) |  |  | 1,130.2 |  |  | (62.8) |  |  | 1,298.6 |
| $ | (10.2) |  |  | $ | 1,963.9 |  |  | $ | (672.1) |  |  | $ | 16,184.9 |  |  | $ | (682.3) |  |  | $ | 18,148.8 |
The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of June 30, 2024 are as follows:
| June 30, 2024
| Securities in unrealized loss position less than 12 months |  | Securities in unrealized loss position greater than 12 months |  | Total
| Gross Unrealized Losses |  | Fair Market Value |  | Gross Unrealized Losses |  | Fair Market Value |  | Gross Unrealized Losses |  | Fair Market Value
Corporate bonds | $ | (25.8) |  |  | $ | 2,173.6 |  |  | $ | (919.0) |  |  | $ | 12,413.4 |  |  | $ | (944.8) |  |  | $ | 14,587.0 |
U.S. Treasury securities | (23.1) |  |  | 2,186.2 |  |  | (141.4) |  |  | 4,076.9 |  |  | (164.5) |  |  | 6,263.1 |
Canadian government obligations and Canadian government agency obligations | (0.9) |  |  | 304.6 |  |  | (85.7) |  |  | 1,591.6 |  |  | (86.6) |  |  | 1,896.2 |
U.S. government agency securities | (0.7) |  |  | 51.5 |  |  | (139.9) |  |  | 1,428.2 |  |  | (140.6) |  |  | 1,479.7 |
Asset-backed securities | (2.3) |  |  | 351.4 |  |  | (40.7) |  |  | 668.0 |  |  | (43.0) |  |  | 1,019.4 |
Canadian provincial bonds | (1.3) |  |  | 193.0 |  |  | (54.9) |  |  | 717.4 |  |  | (56.2) |  |  | 910.4 |
Commercial mortgage-backed securities | (0.5) |  |  | 11.2 |  |  | (34.6) |  |  | 489.6 |  |  | (35.1) |  |  | 500.8 |
Other securities | (12.2) |  |  | 288.5 |  |  | (63.7) |  |  | 864.8 |  |  | (75.9) |  |  | 1,153.3 |
| $ | (66.8) |  |  | $ | 5,560.0 |  |  | $ | (1,479.9) |  |  | $ | 22,249.9 |  |  | $ | (1,546.7) |  |  | $ | 27,809.9 |
Schedule of Classification of Corporate Investments on the Consolidated Balance Sheets | Classification of corporate investments on the Consolidated Balance Sheets is as follows:
June 30, |  | 2025 |  | 2024
Corporate investments: |  |  |  |
Cash and cash equivalents |  | $ | 3,347.8 |  |  | $ | 2,913.4 |
Short-term marketable securities |  | 4,498.8 |  |  | 384.0 |
Total corporate investments |  | $ | 7,846.6 |  |  | $ | 3,297.4 |
Schedule of Investment of Funds Held for Clients | Funds held for clients have been invested in the following categories:
June 30, |  | 2025 |  | 2024
Funds held for clients: |  |  |  |
Restricted cash and cash equivalents held to satisfy client funds obligations |  | $ | 1,706.8 |  |  | $ | 7,172.6 |
Restricted short-term marketable securities held to satisfy client funds obligations |  | 3,155.7 |  |  | 5,538.1 |
Restricted long-term marketable securities held to satisfy client funds obligations |  | 26,123.2 |  |  | 25,285.4 |
Total funds held for clients |  | $ | 30,985.7 |  |  | $ | 37,996.1 |
Schedule of Expected Maturities of Available-for-Sale Securities | Expected maturities of available-for-sale securities at June 30, 2025 are as follows:
One year or less | $ | 7,654.5 |
One year to two years | 5,888.4 |
Two years to three years | 4,322.9 |
Three years to four years | 5,106.0 |
After four years | 10,805.9 |
Total available-for-sale securities | $ | 33,777.7 |

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