Accounts Payable and Other Current Liabilities - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2015	Sep. 30, 2014
Accounts Payable and Other Current Liabilities [Abstract]
Accounts Payable	$ 643.0	$ 535.7
Accrued interest	129.4	157.5
Income taxes payable	92.4	57.9
Oil and natural gas revenues and royalties payable	15.5	39.9
Oil and natural gas revenues and royalties payable	14.4	14.4
Accrued expenses and other	234.9	215.8
Restructuring and related charges	8.1	11.8
Total accounts payable and other current liabilities	$ 1,137.7	$ 1,033.0

Accounts Payable and Other Current Liabilities [Abstract]

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Accrued wages and related expenses.

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- Definition

Oil and Gas Sales Payable and Royalties Payable, Current

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No definition available.

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- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

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-Publisher FASB

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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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