Deferred Costs - Summary of Changes in Carrying Amount of Corporation's Net Deferred Costs (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Beginning balance	$ 294,322am_DeferredCostsNet	$ 272,597am_DeferredCostsNet	$ 306,217am_DeferredCostsNet
Payments	124,258am_DeferredCostsAdvancePayments	130,970am_DeferredCostsAdvancePayments	82,474am_DeferredCostsAdvancePayments
Amortization	(114,125)am_AmortizationOfDeferredCost	(108,761)am_AmortizationOfDeferredCost	(109,543)am_AmortizationOfDeferredCost
Effective settlement of Clinton Cards contract upon acquisition			(6,192)
Contract asset impairment	(4,422)am_ContractImpairmentOfDeferredCosts
Currency translation	(806)	(484)	(359)
Ending balance	$ 299,227am_DeferredCostsNet	$ 294,322am_DeferredCostsNet	$ 272,597am_DeferredCostsNet

Amortization of amounts previously capitalized under retail supply agreements with customers.

No definition available.

Name:	am_AmortizationOfDeferredCost
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of effective settlement of previously deferred costs under a retail supply agreement with a customer acquired by the Corporation.

+ References

No definition available.

+ Details

Name:	am_BusinessAcquisitionSettlementAdjustments
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Impairment of previously capitalized costs under retail supply agreements that are not expected to be recovered due to awareness of customer's inability to meet its performance obligation.

+ References

No definition available.

+ Details

Name:	am_ContractImpairmentOfDeferredCosts
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the adjustment for currency translation and other net deferred costs.

+ References

No definition available.

+ Details

Name:	am_CurrencyTranslationAndOtherDeferredCostsNet
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Advance payments, allowances and other credits given to customers under retail supply agreements that are capitalized and recognized over the life of the supply agreement.

+ References

No definition available.

+ Details

Name:	am_DeferredCostsAdvancePayments
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Net amount of total deferred cost assets and total future payment commitments associated with retail supply agreements.

+ References

No definition available.

+ Details

Name:	am_DeferredCostsNet
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration