Term of the contract from original inception, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing.

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- Definition

Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Summary of Significant Accounting Policies - Principles of Consolidation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Basis of Presentation
Other comprehensive income (loss)	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Accounts Payable
Basis of Presentation
Bank Overdrafts	11.7		11.7
Revenue distributions payable
Basis of Presentation
Bank Overdrafts	$ 26.7		$ 26.7
Antero Midstream Partners LP
Basis of Presentation
Antero Resources ownership in Antero Midstream			52.90%		52.90%
Antero Midstream Partners LP
Basis of Presentation
Term of contract with Antero Midstream			20 years