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Pension Plans (Tables) | 9 Months Ended
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May 31, 2019
Retirement Benefits [Abstract] |
Schedule of Net Periodic Pension Cost | Net periodic pension cost during the three and nine months ended May 31, 2019 and 2018 included the following components before tax (in millions):
| Three Months Ended |  | Nine Months Ended
| May 31, 2019 |  | May 31, 2018 |  | May 31, 2019 |  | May 31, 2018
Service cost | $ | 0.8 |  |  | $ | 0.7 |  |  | $ | 2.4 |  |  | $ | 2.1 |
Interest cost | 2.2 |  |  | 2.2 |  |  | 6.7 |  |  | 6.6 |
Expected return on plan assets | (3.1 | ) |  | (3.1 | ) |  | (9.4 | ) |  | (9.3 | )
Amortization of prior service cost | 0.8 |  |  | 0.8 |  |  | 2.3 |  |  | 2.4 |
Settlement loss | — |  |  | — |  |  | 0.4 |  |  | — |
Recognized actuarial loss | 1.0 |  |  | 1.7 |  |  | 3.1 |  |  | 5.1 |
Net periodic pension cost | $ | 1.7 |  |  | $ | 2.3 |  |  | $ | 5.5 |  |  | $ | 6.9 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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