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Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Sep. 30, 2018	Oct. 17, 2014
Debt
Total debt	$ 3,852,500	$ 3,673,500
Less: Current portion of debt and short-term borrowings	(159,600)	(143,100)
Less: Unamortized debt issuance costs	(39,600)	(46,700)
Long-term debt	3,653,291	3,483,746
2014 Credit Agreement
Debt
Total debt	1,586,500	1,433,800
2014 Senior Notes
Debt
Total debt	800,000	800,000
2017 Senior Notes
Debt
Total debt	1,000,000	1,000,000
URS Senior Notes
Debt
Total debt	248,000	247,900	$ 1,000,000
Other Debt
Debt
Total debt	$ 218,000	$ 191,800

X

- Definition

Amount of short-term and long-term debt and lease obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
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- Definition

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Amount of long-term debt and lease obligation, classified as noncurrent.

+ References

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-Topic 210
-SubTopic 10
-Section S99
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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

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-Topic 210
-SubTopic 10
-Section S99
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