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Funds Held for Clients and Corporate Investments (Tables) | 3 Months Ended
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Aug. 31, 2018
Funds Held for Clients and Corporate Investments [Abstract] |
Funds Held for Clients and Corporate Investments | ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | August 31, 2018
﻿ |  |  |  |  | Gross |  | Gross |  |  |
﻿ |  | Amortized |  | unrealized |  | unrealized |  | Fair
﻿In millions |  | cost |  | gains |  | losses |  | value
﻿Type of issue: |  |  |  |  |  |  |  |  |  |  |  |
﻿Funds held for clients' money market securities and other cash equivalents |  | $ | 1,179.8 |  | $ | — |  | $ | — |  | $ | 1,179.8
﻿Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds |  |  | 367.7 |  |  | 0.3 |  |  | (7.3) |  |  | 360.7
﻿General obligation municipal bonds |  |  | 1,149.8 |  |  | 1.3 |  |  | (9.7) |  |  | 1,141.4
﻿Pre-refunded municipal bonds(1) |  |  | 45.7 |  |  | 0.2 |  |  | (0.1) |  |  | 45.8
﻿Revenue municipal bonds |  |  | 767.5 |  |  | 1.0 |  |  | (7.1) |  |  | 761.4
﻿U.S. government agency securities |  |  | 454.5 |  |  | 0.1 |  |  | (14.6) |  |  | 440.0
﻿Variable rate demand notes |  |  | 162.3 |  |  | — |  |  | — |  |  | 162.3
﻿Total available-for-sale securities |  |  | 2,947.5 |  |  | 2.9 |  |  | (38.8) |  |  | 2,911.6
﻿Other |  |  | 17.4 |  |  | 2.5 |  |  | — |  |  | 19.9
﻿Total funds held for clients and corporate investments |  | $ | 4,144.7 |  | $ | 5.4 |  | $ | (38.8) |  | $ | 4,111.3
﻿ ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | May 31, 2018
﻿ |  |  |  |  | Gross |  | Gross |  |  |
﻿ |  | Amortized |  | unrealized |  | unrealized |  | Fair
﻿In millions |  | cost |  | gains |  | losses |  | value
﻿Type of issue: |  |  |  |  |  |  |  |  |  |  |  |
﻿Funds held for clients' money market securities and other cash equivalents |  | $ | 1,942.3 |  | $ | — |  | $ | — |  | $ | 1,942.3
﻿Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds |  |  | 328.6 |  |  | 0.1 |  |  | (7.3) |  |  | 321.4
﻿General obligation municipal bonds |  |  | 1,231.6 |  |  | 1.3 |  |  | (11.2) |  |  | 1,221.7
﻿Pre-refunded municipal bonds(1) |  |  | 50.9 |  |  | 0.1 |  |  | (0.1) |  |  | 50.9
﻿Revenue municipal bonds |  |  | 813.5 |  |  | 0.9 |  |  | (8.0) |  |  | 806.4
﻿U.S. government agency securities |  |  | 410.2 |  |  | — |  |  | (14.1) |  |  | 396.1
﻿Variable rate demand notes |  |  | 308.3 |  |  | — |  |  | — |  |  | 308.3
﻿Total available-for-sale securities |  |  | 3,143.1 |  |  | 2.4 |  |  | (40.7) |  |  | 3,104.8
﻿Other |  |  | 16.1 |  |  | 2.1 |  |  | — |  |  | 18.2
﻿Total funds held for clients and corporate investments |  | $ | 5,101.5 |  | $ | 4.5 |  | $ | (40.7) |  | $ | 5,065.3
﻿ (1) Pre-refunded municipal bonds are secured by an escrow fund of U.S. government obligations.
Classification of Investments on Consolidated Balance Sheets |
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | August 31, |  | May 31,
﻿In millions |  | 2018 |  | 2018
﻿Funds held for clients |  | $ | 3,763.8 |  | $ | 4,703.8
﻿Corporate investments |  |  | 82.9 |  |  | 66.0
﻿Long-term corporate investments |  |  | 264.6 |  |  | 295.5
﻿Total funds held for clients and corporate investments |  | $ | 4,111.3 |  | $ | 5,065.3
﻿
Securities in Unrealized Loss Position | ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | August 31, 2018
﻿ |  | Securities in an unrealized loss position for less than twelve months |  | Securities in an unrealized loss position for more than twelve months |  | Total
﻿ |  | Gross |  |  |  |  | Gross |  |  |  |  | Gross |  |  |
﻿ |  | unrealized |  | Fair |  | unrealized |  | Fair |  | unrealized |  | Fair
﻿In millions |  | losses |  | value |  | losses |  | value |  | losses |  | value
﻿Type of issue: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds |  | $ | (5.8) |  | $ | 272.9 |  | $ | (1.5) |  | $ | 39.7 |  | $ | (7.3) |  | $ | 312.6
﻿General obligation municipal bonds |  |  | (7.4) |  |  | 745.1 |  |  | (2.3) |  |  | 64.1 |  |  | (9.7) |  |  | 809.2
﻿Pre-refunded municipal bonds |  |  | (0.1) |  |  | 12.8 |  |  | — |  |  | 0.5 |  |  | (0.1) |  |  | 13.3
﻿Revenue municipal bonds |  |  | (5.2) |  |  | 445.1 |  |  | (1.9) |  |  | 55.6 |  |  | (7.1) |  |  | 500.7
﻿U.S. government agency securities |  |  | (7.0) |  |  | 232.8 |  |  | (7.6) |  |  | 176.7 |  |  | (14.6) |  |  | 409.5
﻿Total |  | $ | (25.5) |  | $ | 1,708.7 |  | $ | (13.3) |  | $ | 336.6 |  | $ | (38.8) |  | $ | 2,045.3
﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | May 31, 2018
﻿ |  | Securities in an unrealized loss position for less than twelve months |  | Securities in an unrealized loss position for more than twelve months |  | Total
﻿ |  | Gross |  |  |  |  | Gross |  |  |  |  | Gross |  |  |
﻿ |  | unrealized |  | Fair |  | unrealized |  | Fair |  | unrealized |  | Fair
﻿In millions |  | losses |  | value |  | losses |  | value |  | losses |  | value
﻿Type of issue: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds |  | $ | (6.0) |  | $ | 271.5 |  | $ | (1.3) |  | $ | 34.6 |  | $ | (7.3) |  | $ | 306.1
﻿General obligation municipal bonds |  |  | (8.7) |  |  | 856.4 |  |  | (2.5) |  |  | 68.9 |  |  | (11.2) |  |  | 925.3
﻿Pre-refunded municipal bonds |  |  | (0.1) |  |  | 18.5 |  |  | — |  |  | 0.5 |  |  | (0.1) |  |  | 19.0
﻿Revenue municipal bonds |  |  | (6.3) |  |  | 540.9 |  |  | (1.7) |  |  | 50.9 |  |  | (8.0) |  |  | 591.8
﻿U.S. government agency securities |  |  | (6.4) |  |  | 219.7 |  |  | (7.7) |  |  | 176.4 |  |  | (14.1) |  |  | 396.1
﻿Total |  | $ | (27.5) |  | $ | 1,907.0 |  | $ | (13.2) |  | $ | 331.3 |  | $ | (40.7) |  | $ | 2,238.3
﻿
Amortized Cost and Fair Value of Available-for-Sale Securities by Contractual Maturity |
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | August 31, 2018
﻿ |  |  |  |  |  |
﻿ |  | Amortized |  | Fair
﻿In millions |  | cost |  | value
﻿Maturity date: |  |  |  |  |  |
﻿Due in one year or less |  | $ | 382.8 |  | $ | 382.4
﻿Due after one year through three years |  |  | 788.0 |  |  | 784.6
﻿Due after three years through five years |  |  | 979.8 |  |  | 965.6
﻿Due after five years |  |  | 796.9 |  |  | 779.0
﻿Total |  | $ | 2,947.5 |  | $ | 2,911.6
﻿

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