Segment Information - Schedule of Adjusted EBITDA (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	9 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Total adjusted EBITDA	$ 420,291	$ 311,262	$ 800,941	$ 617,010
Depreciation, amortization and accretion expense	(213,719)	(128,270)	(415,872)	(250,800)
Stock-based compensation expense	(39,323)	(33,993)	(73,838)	(64,606)	$ (73,838)	$ (64,606)
Acquisition costs	(15,594)	(9,866)	(52,130)	(11,022)
Gains on asset sales	0	0	5,242	0
Income from continuing operations	151,655	139,133	264,343	290,582
Americas
Segment Reporting Information [Line Items]
Total adjusted EBITDA	195,028	170,886	379,488	343,620
EMEA
Segment Reporting Information [Line Items]
Total adjusted EBITDA	133,455	79,533	244,944	155,564
Asia-Pacific
Segment Reporting Information [Line Items]
Total adjusted EBITDA	$ 91,808	$ 60,843	$ 176,509	$ 117,826

Adjusted earnings before interest, taxes, depreciation and amortization/accretion.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

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- Definition

The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The net result for the period of deducting operating expenses from operating revenues.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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