Name:	joy_FinalAwardsEarnedForPerformanceShareProgram
Namespace Prefix:	joy_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The number of deferred shares of equity instruments other than options outstanding at the end of the period under a share-based award plan.

No definition available.

Name:	joy_NumberOfDeferredShares
Namespace Prefix:	joy_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Number of shares of common stock represented by each performance share.

No definition available.

Name:	joy_NumberOfSharesOfCommonStockRepresentedByEachPerformanceShare
Namespace Prefix:	joy_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The number of years after the Director's service on the Board of Directors terminates, that a number of shares of common stock equivalent to the vested restricted stock units will be delivered to the individual director.

No definition available.

Name:	joy_NumberOfYearsAfterTerminationOfServiceOnBoardOfDirectorsAfterWhichSharesWillBeDelivered
Namespace Prefix:	joy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The maximum percentage of target award opportunities that may be paid out in stock, cash or a combination of stock and cash as determined by the Human Resources and Nominating Committee of the Board of Directors.

No definition available.

Name:	joy_PercentageOfTargetAwardOpportunitiesMaximum
Namespace Prefix:	joy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The maximum percentage of target award opportunities, in certain cases, that may be paid out in stock, cash or a combination of stock and cash as determined by the Human Resources and Nominating Committee of the Board of Directors.

No definition available.

Name:	joy_PercentageOfTargetAwardOpportunitiesMaximumInCertainCases
Namespace Prefix:	joy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The minimum percentage of target award opportunities that may be paid out in stock, cash or a combination of stock and cash as determined by the Human Resources and Nominating Committee of the Board of Directors.

No definition available.

Name:	joy_PercentageOfTargetAwardOpportunitiesMinimum
Namespace Prefix:	joy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The period of the award cycle at the end of which shares of common stock may be earned by participants under the performance share award program, if at the end of the award cycle the Company's financial performance exceeds certain threshold amounts.

No definition available.

Name:	joy_PeriodOfAwardCycle
Namespace Prefix:	joy_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	joy_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardLineItems
Namespace Prefix:	joy_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Description of the period of time over which a Director's right to exercise a restricted stock unit award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year).

No definition available.

Name:	joy_VestingPeriodOfRestrictedStockUnitsGrantedToDirectors
Namespace Prefix:	joy_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Description of the period of time over which an employee's right to exercise a restricted stock unit award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year).

No definition available.

Name:	joy_VestingPeriodOfRestrictedStockUnitsGrantedToEmployees
Namespace Prefix:	joy_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

Description of award terms as to how many shares or portion of a restricted stock unit award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

No definition available.

Name:	joy_VestingRightsOfRestrictedStockUnitsGrantedToEmployees
Namespace Prefix:	joy_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph g(1)

-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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-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 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

For each plan, identification of the award pricing model or other valuation method used in calculating the weighted average fair values disclosed. The model is also used to calculate the compensation expense that is shown within the balance sheet, income statement, and cash flow. Examples of valuation techniques are lattice models (binomial model), closed-form models (Black-Scholes-Merton formula), and a Monte Carlo simulation technique. Fair value is the amount at which an asset or liability could be bought or incurred or sold or settled in a current transaction between willing parties, that is, other than in a forced or liquidation sale. May include disclosures about the assumptions underlying application of the method selected.

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

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-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 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901