Represents the information pertaining to number of subsidiaries.

No definition available.

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)

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- Definition

Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

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- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)(2)

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

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Amount of increase in unrecognized tax benefits resulting from settlements with taxing authorities.

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INCOME TAXES (Details 6) (USD $) In Millions, unless otherwise specified	4 Months Ended	12 Months Ended		5 Months Ended
	Dec. 31, 2012	Dec. 31, 2014 item	Dec. 31, 2013	Aug. 30, 2012
Reconciliation of the change in the amount of unrecognized tax benefits
Balance at beginning of period	$ 22.4us-gaap_UnrecognizedTaxBenefits	$ 27.4us-gaap_UnrecognizedTaxBenefits	$ 21.9us-gaap_UnrecognizedTaxBenefits
Gross increases-current period tax positions		1.6	3.8
Gross increases-prior periods tax position		1.5	2.2
Favorable resolutions with authorities			(0.5)
Cash settlements	(0.5)
Balance at end of period	21.9us-gaap_UnrecognizedTaxBenefits	30.5us-gaap_UnrecognizedTaxBenefits	27.4us-gaap_UnrecognizedTaxBenefits
Number of subsidiaries files income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions		1amc_NumberOfSubsidiaries
Predecessor
Reconciliation of the change in the amount of unrecognized tax benefits
Balance at beginning of period				22.7
Gross increases-current period tax positions				0.6
Cash settlements				(0.9)
Balance at end of period				$ 22.4