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Pension and Defined Contribution Plans - Domestic and International Pension Plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Aug. 31, 2021 | Aug. 31, 2020 | Aug. 31, 2019
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Non-current assets | $ 13.0 | $ 0.0 |
Non-current liabilities | (60.2) | (91.6) |
Pension Plan | Domestic Plans |  |  |
Change in Benefit Obligation: |  |  |
Benefit obligation at beginning of year | 249.6 | 239.2 |
Service cost | 4.6 | 4.3 | $ 2.9
Interest cost | 5.3 | 6.4 | 7.7
Actuarial (gains) losses | (5.2) | 8.5 |
Benefits paid | (29.6) | (8.8) |
Other | 0.0 | 0.0 |
Benefit obligation at end of year | 224.7 | 249.6 | 239.2
Change in plan assets: |  |  |
Fair value of plan assets at beginning of year | 167.1 | 151.5 |
Actual return on plan assets | 21.7 | 19.0 |
Employer contributions | 23.4 | 5.4 |
Benefits paid | (29.6) | (8.8) |
Other | 0.0 | 0.0 |
Fair value of plan assets at end of year | 182.6 | 167.1 | 151.5
Funded status at end of year: |  |  |
Funded status at the end of year | (42.1) | (82.5) |
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Non-current assets | 13.0 | 0.0 |
Current liabilities | (5.2) | (5.0) |
Non-current liabilities | (49.9) | (77.5) |
Net amount recognized in consolidated balance sheets | (42.1) | (82.5) |
Accumulated benefit obligation | 223.8 | 249.1 |
Pre-tax amounts in accumulated other comprehensive loss: |  |  |
Prior service cost | (5.6) | (8.4) |
Net actuarial loss | (55.2) | (79.2) |
Amounts in accumulated other comprehensive loss | (60.8) | (87.6) |
Pension Plan | Domestic Plans | Pensions plans in which benefit obligation exceeds plan assets: |  |  |
Pensions plans in which benefit obligation exceeds plan assets: |  |  |
Projected benefit obligation | 81.7 | 249.6 |
Accumulated benefit obligation | 80.8 | 249.1 |
Plan assets | 26.6 | 167.1 |
Pension Plan | Domestic Plans | Pensions plans in which plan assets exceed benefit obligation: |  |  |
Pensions plans in which plan assets exceed benefit obligation: |  |  |
Projected benefit obligation | 143.0 | 0.0 |
Accumulated benefit obligation | 143.0 | 0.0 |
Plan assets | 156.0 | 0.0 |
Pension Plan | International Plans |  |  |
Change in Benefit Obligation: |  |  |
Benefit obligation at beginning of year | 49.2 | 44.6 |
Service cost | 0.3 | 0.3 | 0.2
Interest cost | 0.9 | 0.9 | 1.3
Actuarial (gains) losses | 1.7 | 0.7 |
Benefits paid | (1.3) | (1.4) |
Other | 1.8 | 4.1 |
Benefit obligation at end of year | 52.6 | 49.2 | 44.6
Change in plan assets: |  |  |
Fair value of plan assets at beginning of year | 35.1 | 30.7 |
Actual return on plan assets | 5.3 | 1.9 |
Employer contributions | 2.1 | 0.8 |
Benefits paid | (1.3) | (1.4) |
Other | 1.0 | 3.1 |
Fair value of plan assets at end of year | 42.2 | 35.1 | $ 30.7
Funded status at end of year: |  |  |
Funded status at the end of year | (10.4) | (14.1) |
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Non-current assets | 0.0 | 0.0 |
Current liabilities | (0.1) | 0.0 |
Non-current liabilities | (10.3) | (14.1) |
Net amount recognized in consolidated balance sheets | (10.4) | (14.1) |
Accumulated benefit obligation | 51.7 | 49.2 |
Pre-tax amounts in accumulated other comprehensive loss: |  |  |
Prior service cost | (0.1) | 0.0 |
Net actuarial loss | (11.3) | (13.5) |
Amounts in accumulated other comprehensive loss | (11.4) | (13.5) |
Pension Plan | International Plans | Pensions plans in which benefit obligation exceeds plan assets: |  |  |
Pensions plans in which benefit obligation exceeds plan assets: |  |  |
Projected benefit obligation | 52.6 | 49.2 |
Accumulated benefit obligation | 51.7 | 49.2 |
Plan assets | 42.2 | 35.1 |
Pension Plan | International Plans | Pensions plans in which plan assets exceed benefit obligation: |  |  |
Pensions plans in which plan assets exceed benefit obligation: |  |  |
Projected benefit obligation | 0.0 | 0.0 |
Accumulated benefit obligation | 0.0 | 0.0 |
Plan assets | $ 0.0 | $ 0.0 |

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- Definition Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
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- Definition Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
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- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 + Details
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1731-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1703-114919 + Details
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1703-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1731-114919 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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