2.4.0.840701 - Disclosure - Employee Benefit Plans (Narrative) (Details)truefalseIn Millions, unless otherwise specifiedfalse1false USDfalsefalse$Duration_3_31_2013_To_6_29_2013http://www.sec.gov/CIK0000025793duration2013-03-31T00:00:002013-06-29T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$Duration_12_30_2012_To_6_29_2013http://www.sec.gov/CIK0000025793duration2012-12-30T00:00:002013-06-29T00:00:00Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 1us-gaap_CompensationAndRetirementDisclosureAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Employee Benefit Plans [Abstract]2false 2us-gaap_DefinedBenefitPlanContributionsByEmployerus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse7000000.7USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe increase in the fair value of plan assets from contributions made by the employer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 false2Employer contribution to defined benefit pension plans3false 2atx_DefinedBenefitPlanEstimatedEmployerContributionsInCurrentFiscalYearatx_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse21000002.1falsefalsefalse2truefalsefalse21000002.1falsefalsefalsexbrli:monetaryItemTypemonetaryThe employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan in the current fiscal period.No definition available.false2Expected contribution to defined benefit pension plans4false 2atx_DefinedContributionRetirementPlanExpectedContributionInCurrentFiscalYearatx_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse9000000.9falsefalsefalse2truefalsefalse9000000.9falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount the company expects to contribute to it's defined contribution retirement plan.No definition available.false2Expected contribution to defined contribution retirement plans5false 2us-gaap_SettlementOfAssetRetirementObligationsThroughNoncashPaymentsAmountus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse14000001.4USD$falsetruefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of asset retirement obligations settled through noncash transactions. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 false2Defined benefit pension plan, settledfalseEmployee Benefit Plans (Narrative) (Details) (USD $)HundredThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://cross.com/role/DisclosureEmployeeBenefitPlansNarrativeDetails25