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Income Taxes (Tables) | 12 Months Ended
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May 31, 2019
Income Taxes [Abstract] |
Components of Deferred Tax Assets and Liabilities |
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | May 31,
﻿ |  |  |  |  | 2018
﻿In millions |  | 2019 |  | As Adjusted(1)
﻿Deferred tax assets: |  |  |  |  |  |
﻿Compensation and employee benefit liabilities |  | $ | 36.3 |  | $ | 15.0
﻿Other current liabilities |  |  | 8.8 |  |  | 6.5
﻿Tax credit carry forward |  |  | 0.2 |  |  | 0.2
﻿Depreciation |  |  | — |  |  | 3.6
﻿Stock-based compensation |  |  | 17.5 |  |  | 11.6
﻿Unrealized losses on available-for-sale securities |  |  | — |  |  | 9.2
﻿Net operating loss ("NOL") carry forwards |  |  | 10.6 |  |  | 5.9
﻿Tax benefit of uncertain tax positions |  |  | 5.7 |  |  | 3.7
﻿Other |  |  | 1.2 |  |  | 2.3
﻿Gross deferred tax assets |  |  | 80.3 |  |  | 58.0
﻿Deferred tax liabilities: |  |  |  |  |  |
﻿Deferred contract costs |  |  | 119.7 |  |  | 105.6
﻿Capitalized software |  |  | 42.8 |  |  | 39.4
﻿Depreciation |  |  | 3.0 |  |  | —
﻿Goodwill and intangible assets |  |  | 127.5 |  |  | 49.0
﻿Revenue not subject to current taxes |  |  | 5.2 |  |  | 18.4
﻿Unrealized gains on available-for-sale securities |  |  | 5.2 |  |  | —
﻿Gross deferred tax liabilities |  |  | 303.4 |  |  | 212.4
﻿Net deferred tax liability |  | $ | (223.1) |  | $ | (154.4)
﻿
| (1) |  | Amounts have been adjusted to reflect the adoption of ASC Topic 606.
Components of Provision for Income Taxes | ﻿
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Year ended May 31,
﻿ |  |  |  |  | 2018 |  | 2017
﻿In millions |  | 2019 |  | As Adjusted(1) |  | As Adjusted(1)
﻿Current: |  |  |  |  |  |  |  |  |
﻿Federal |  | $ | 258.2 |  | $ | 289.1 |  | $ | 362.0
﻿State |  |  | 70.7 |  |  | 54.1 |  |  | 48.1
﻿Total current |  |  | 328.9 |  |  | 343.2 |  |  | 410.1
﻿Deferred: |  |  |  |  |  |  |  |  |
﻿Federal |  |  | 0.7 |  |  | (38.0) |  |  | 21.2
﻿State |  |  | 4.0 |  |  | 0.8 |  |  | 1.5
﻿Total deferred |  |  | 4.7 |  |  | (37.2) |  |  | 22.7
﻿Income taxes |  | $ | 333.6 |  | $ | 306.0 |  | $ | 432.8
﻿
| (1) |  | Amounts have been adjusted to reflect the adoption of ASC Topic 606.
Reconciliation of U.S. Federal Statutory Tax Rate |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Year ended May 31,
﻿ |  | 2019 |  | 2018 |  | 2017
﻿Federal statutory tax rate |  | 21.0 | % |  | 29.2 | % |  | 35.0 | %
﻿Increase/(decrease) resulting from: |  |  |  |  |  |  |  |  |
﻿Statutory tax rate reduction resulting from the Tax Act |  | — | % |  | (2.0) | % |  | — | %
﻿State income taxes, net of federal tax benefit |  | 4.3 | % |  | 3.0 | % |  | 2.8 | %
﻿Section 199 - Qualified production activities |  | — | % |  | (0.3) | % |  | (0.5) | %
﻿Tax-exempt municipal bond interest |  | (0.5) | % |  | (1.1) | % |  | (1.3) | %
﻿Stock option windfall benefit |  | (0.5) | % |  | (0.8) | % |  | (1.5) | %
﻿Other items, including adoption of ASC 606 |  | 0.1 | % |  | (4.5) | % |  | (0.1) | %
﻿Effective income tax rate |  | 24.4 | % |  | 23.5 | % |  | 34.4 | %
﻿
Reconciliation of Gross Unrecognized Tax Benefits, Not Including Interest or Other Potential Offsetting Effects |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Year ended May 31,
﻿In millions |  | 2019 |  | 2018 |  | 2017
﻿Balance as of beginning of fiscal year |  | $ | 14.9 |  | $ | 43.7 |  | $ | 64.7
﻿Additions for tax positions of the current year |  |  | 3.8 |  |  | 2.3 |  |  | 8.2
﻿Additions for tax positions of prior years |  |  | 5.2 |  |  | 0.1 |  |  | 4.8
﻿Reductions for tax positions of prior years |  |  | — |  |  | (1.2) |  |  | (2.5)
﻿Settlements with tax authorities |  |  | (1.2) |  |  | (28.6) |  |  | (29.5)
﻿Expiration of the statute of limitations |  |  | (0.6) |  |  | (1.4) |  |  | (2.0)
﻿Balance as of end of fiscal year |  | $ | 22.1 |  | $ | 14.9 |  | $ | 43.7
﻿

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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