2.2.0.7 false Deferred Income and Allowances on Sales to Distributors (Details) (USD $) 0606 - Disclosure - Deferred Income and Allowances on Sales to Distributors (Details) true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 2 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 3 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 3 Deferred Income and Allowances on Sales to Distributors 1 us-gaap_DeferredRevenueAndCreditsCurrentAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 4 Deferred revenue on shipments to distributors 2 us-gaap_DeferredRevenueCurrent us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 584777000 584777000 false false false 2 false false false false 0 0 false false false 3 true true false false 363448000 363448000 false false false xbrli:monetaryItemType monetary The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 7, 8 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A false 5 Deferred cost of sales on shipments to distributors 2 altr_DeferredCostOfSalesOnShipmentsToDistributors altr false debit instant Deferred cost of sales on shipments to distributors. false false false false false false false false false false true negatedtotal false 1 false true false false -39374000 -39374000 false false false 2 false false false false 0 0 false false false 3 false true false false -28971000 -28971000 false false false xbrli:monetaryItemType monetary Deferred cost of sales on shipments to distributors. No authoritative reference available. true 6 Deferred income on shipments to distributors 2 altr_DeferredIncomeOnShipmentsToDistributors altr false credit instant Deferred income on shipments to distributors. false false false false false false false false false false false verboselabel false 1 false true false false 545403000 545403000 false false false 2 false false false false 0 0 false false false 3 false true false false 334477000 334477000 false false false xbrli:monetaryItemType monetary Deferred income on shipments to distributors. No authoritative reference available. false 7 Advances to distributors 2 altr_AdvancesToDistributors altr false debit instant Advances to distributors. false false false false false false false false false false true negated false 1 false true false false -157333000 -157333000 false false false 2 false false false false 0 0 false false false 3 false true false false -60877000 -60877000 false false false xbrli:monetaryItemType monetary Advances to distributors. No authoritative reference available. false 8 Other deferred revenue 2 us-gaap_OtherDeferredCreditsCurrent us-gaap true credit instant No definition available. false false false false false false false false false false false totallabel false 1 false true false false 7359000 7359000 [1] false false false 2 false false false false 0 0 false false false 3 false true false false 8285000 8285000 [1] false false false xbrli:monetaryItemType monetary Carrying amount as of the balance sheet date of unearned revenue or income not otherwise specified in the taxonomy which is expected to be taken into income within one year or the normal operating cycle, if longer. No authoritative reference available. true 9 Total 2 us-gaap_DeferredRevenueAndCreditsCurrent us-gaap true credit instant No definition available. false false false false false false false false false false false totallabel false 1 false true false false 395429000 395429000 false false false 2 false false false false 0 0 false false false 3 false true false false 281885000 281885000 false false false xbrli:monetaryItemType monetary Total carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue or other forms of income in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A true 10 Deferred income and allowances on sales to distributor activity 1 us-gaap_MovementInDeferredRevenueRollForward us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false xbrli:stringItemType string A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. false 11 Balance at beginning of period 2 us-gaap_DeferredRevenue us-gaap true credit instant No definition available. false false false false false false false false true false false periodstartlabel false 1 false true false false 281885000 281885000 false false false 2 false true false false 205674000 205674000 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A false 12 Deferred revenue recognized upon shipment to distributors 2 us-gaap_DeferredRevenueAdditions us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 4216374000 4216374000 false false false 2 false true false false 2089836000 2089836000 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A false 13 Deferred costs of sales recognized upon shipments to distributors 2 altr_DeferredCostsOfSalesRecognizedUponShipmentsToDistributors altr false debit duration Deferred costs of sales recognized upon shipments to distributors. false false false false false false false false false false false verboselabel false 1 false true false false -246151000 -246151000 false false false 2 false true false false -143795000 -143795000 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Deferred costs of sales recognized upon shipments to distributors. No authoritative reference available. false 14 (Increase) decrease in advances to distributors 2 altr_DecreaseIncreaseInAdvancesToDistributors altr false credit duration Decrease (increase) in advances to distributors. false false false false false false false false false false false verboselabel false 1 false true false false -96456000 -96456000 false false false 2 false true false false 20937000 20937000 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Decrease (increase) in advances to distributors. No authoritative reference available. false 15 Revenue recognized upon sell-through to end customers 2 us-gaap_DeferredRevenueRevenueRecognized us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -744607000 -744607000 false false false 2 false true false false -412025000 -412025000 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A false 16 Costs of sales recognized upon sell-through to end customers 2 altr_CostsOfSalesRecognizedUponSellThroughToEndCustomers altr false credit duration Costs of sales recognized upon sell-through to end customers. false false false false false false false false false false false verboselabel false 1 false true false false 217260000 217260000 false false false 2 false true false false 137145000 137145000 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Costs of sales recognized upon sell-through to end customers. No authoritative reference available. false 17 Earned distributor price concessions 2 altr_EarnedDistributorPriceConcessions altr false debit duration Earned distributor price concessions false false false false false false false false false false false verboselabel false 1 false true false false -3188650000 -3188650000 [2] false false false 2 false true false false -1547332000 -1547332000 [2] false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Earned distributor price concessions No authoritative reference available. false 18 Returns 2 us-gaap_DeferredRevenueRefundPayments us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -43300000 -43300000 false false false 2 false true false false -116918000 -116918000 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount of refund payments made to customers during the period that was previously reported as deferred revenue. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A false 19 Decrease in other deferred revenue 2 altr_IncreaseDecreaseInOtherDeferredRevenue altr false credit duration Increase (decrease) in other deferred revenue. false false false false false false false false false false false totallabel false 1 false true false false -926000 -926000 false false false 2 false true false false -688000 -688000 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Increase (decrease) in other deferred revenue. No authoritative reference available. true 20 Balance at end of period 2 us-gaap_DeferredRevenue us-gaap true credit instant No definition available. false false false false false false false false false true false periodendlabel false 1 false true false false 395429000 395429000 false false false 2 false true false false 232834000 232834000 false false false 3 false false false false 0 0 false false false xbrli:monetaryItemType monetary Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A false 21 Deferred Income and Allowances on Sales to Distributors (Textuals) 1 altr_DeferredIncomeAndAllowancesOnSalesToDistributorsTextualsAbstract altr false na duration Deferred Income and Allowances on Sales to Distributors. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false xbrli:stringItemType string Deferred Income and Allowances on Sales to Distributors. false 22 Minimum percentage of average aggregate price concessions on list price 2 altr_MinimumPercentageOfAverageAggregatePriceConcessionsOnListPrice altr false na duration Minimum percentage of average aggregate price concessions on list price. false false false false false false false false false false false verboselabel false 1 false true false false 0.65 0.65 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false us-types:percentItemType pure Minimum percentage of average aggregate price concessions on list price. No authoritative reference available. false 23 Maximum percentage of average aggregate price concessions on list price 2 altr_MaximumPercentageOfAverageAggregatePriceConcessionsOnListPrice altr false na duration Maximum percentage of average aggregate price concessions on list price. false false false false false false false false false false false verboselabel false 1 false true false false 0.8 0.8 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false us-types:percentItemType pure Maximum percentage of average aggregate price concessions on list price. No authoritative reference available. false 24 Maximum time period to submit the claim for receiving price concession, days 2 altr_MaximumTimePeriodToSubmitClaimForReceivingPriceConcession altr false na duration Maximum time period to submit the claim for receiving price concession. false false false false false false false false false false false verboselabel false 1 false true false false 60 60 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false xbrli:integerItemType integer Maximum time period to submit the claim for receiving price concession. No authoritative reference available. false 25 Period of settlement for receivable balances, days 2 altr_PeriodOfSettlementForReceivableBalancesDays altr false na duration Period of settlement for receivable balances, days. false false false false false false false false false false false verboselabel false 1 false true false false 30 30 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false xbrli:integerItemType integer Period of settlement for receivable balances, days. No authoritative reference available. false 26 Advances recognized in other current assets 2 us-gaap_AdvancesOnInventoryPurchases us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 55900000 55900000 false false false 2 false false false false 0 0 false false false 3 true true false false 33000000 33000000 false false false xbrli:monetaryItemType monetary Carrying value of capitalized payments made in advance for inventory that is expected to be received within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 8 -Article 5 false 1 Principally represents revenue deferred on our software and intellectual property licenses. 2 Average aggregate price concessions typically range from 65% to 80% of our list price on an annual basis, depending upon the composition of our sales, volumes, and factors associated with timing of shipments to distributors. 3 24 false NoRounding UnKnown UnKnown false true