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Business Acquisitions, Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Mar. 31, 2019
Business Acquisitions, Goodwill and Intangible Assets |
Schedule of changes in the carrying value of goodwill by reportable segment |
|  |  |  |  | Foreign |  |  |
|  | September 30, |  | Exchange |  | March 31,
|  | 2018 |  | Impact |  | 2019
|  | (in millions)
Design and Consulting Services |  | $ | 3,189.2 |  | $ | (9.1) |  | $ | 3,180.1
Construction Services |  |  | 1,008.9 |  |  | (4.0) |  |  | 1,004.9
Management Services |  |  | 1,723.0 |  |  | 0.2 |  |  | 1,723.2
Total |  | $ | 5,921.1 |  | $ | (12.9) |  | $ | 5,908.2
Schedule of finite-lived intangible assets by major class |
|  | March 31, 2019 |  | September 30, 2018 |  |  |  |
|  | Gross |  | Accumulated |  | Intangible |  | Gross |  | Accumulated |  | Intangible |  | Amortization
|  | Amount |  | Amortization |  | Assets, Net |  | Amount |  | Amortization |  | Assets, Net |  | Period
|  | (in millions) |  | (years)
Backlog and customer relationships |  | $ | 1,285.7 |  | $ | (1,009.1) |  | $ | 276.6 |  | $ | 1,285.1 |  | $ | (966.0) |  | $ | 319.1 |  | 1 | - | 11
Trademark / tradename |  |  | 18.3 |  |  | (17.7) |  |  | 0.6 |  |  | 18.3 |  |  | (17.5) |  |  | 0.8 |  | 0.3 | - | 2
Total |  | $ | 1,304.0 |  | $ | (1,026.8) |  | $ | 277.2 |  | $ | 1,303.4 |  | $ | (983.5) |  | $ | 319.9 |  |  |  |
Schedule of estimated future amortization expense of intangible assets |
Fiscal Year |  | (in millions)
2019 (six months remaining) |  | $ | 41.5
2020 |  |  | 69.6
2021 |  |  | 56.6
2022 |  |  | 43.9
2023 |  |  | 39.5
Thereafter |  |  | 26.1
Total |  | $ | 277.2

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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