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Business Acquisitions, Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Dec. 31, 2018
Business Acquisitions, Goodwill and Intangible Assets |
Schedule of changes in the carrying value of goodwill by reportable segment |
|  |  |  |  | Foreign |  |  |
|  | September 30, |  | Exchange |  | December 31,
|  | 2018 |  | Impact |  | 2018
|  | (in millions)
Design and Consulting Services |  | $ | 3,189.2 |  | $ | (14.8) |  | $ | 3,174.4
Construction Services |  |  | 1,008.9 |  |  | (6.6) |  |  | 1,002.3
Management Services |  |  | 1,723.0 |  |  | (6.2) |  |  | 1,716.8
Total |  | $ | 5,921.1 |  | $ | (27.6) |  | $ | 5,893.5
Schedule of finite-lived intangible assets by major class |
|  | December 31, 2018 |  | 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 |  | $ | 1,283.5 |  | $ | (987.4) |  | $ | 296.1 |  | $ | 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 |  | $ | 1,301.8 |  | $ | (1,005.1) |  | $ | 296.7 |  | $ | 1,303.4 |  | $ | (983.5) |  | $ | 319.9 |  |  |  |
Schedule of estimated future amortization expense of intangible assets |
Fiscal Year |  | (in millions)
2019 (nine months remaining) |  | $ | 62.2
2020 |  |  | 69.3
2021 |  |  | 56.3
2022 |  |  | 43.7
2023 |  |  | 39.3
Thereafter |  |  | 25.9
Total |  | $ | 296.7

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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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