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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Mar. 31, 2011
Registrant Name dei_EntityRegistrantName JOHN HANCOCK CURRENT INTEREST
Central Index Key dei_EntityCentralIndexKey 0000026262
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Jul. 25, 2011
Document Effective Date dei_DocumentEffectiveDate Aug. 01, 2011
Prospectus Date rr_ProspectusDate Aug. 01, 2011
Money Market Fund
  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading JOHN HANCOCK MONEY MARKET FUND
Objective [Heading] rr_ObjectiveHeading Investment objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock To seek the maximum current income that is consistent with maintaining liquidity and preserving capital.
Fees and expenses jhci26262_FundFeesAndExpensesAbstract  
Expense [Heading] rr_ExpenseHeading Fees and expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock This table describes the fees and expenses you may pay if you buy and hold shares of the fund. Information about eligibility for waivers of the contingent deferred sales charges applicable to Class B shares and Class C shares is available on page 10 of the prospectus under “CDSC waivers” or pages 43 to 46 of the fund’s statement of additional information under “Waiver of Contingent Deferred Sales Charge.”
Shareholder fees rr_ShareholderFeesAbstract  
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder fees (%) (fees paid directly from your investment)
Annual fund operating expenses rr_OperatingExpensesAbstract  
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual fund operating expenses (%)(expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination July 31, 2012
Expense example rr_ExpenseExampleAbstract  
Expense Example [Heading] rr_ExpenseExampleHeading Expense example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. Please see below a hypothetical example showing the expenses of a $10,000 investment in the fund for the time periods indicated (Kept column) and then assuming a redemption of all of your shares at the end of those periods (Sold column). The example assumes a 5% average annual return. The example assumes fund expenses will not change over the periods. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by Year [Heading] rr_ExpenseExampleByYearHeading Expenses ($)
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Sold
Expense Example, No Redemption rr_ExpenseExampleNoRedemptionAbstract  
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption Kept
Strategy [Heading] rr_StrategyHeading Principal investment strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The fund invests only in U.S.-dollar-denominated securities rated within the two highest short-term credit categories and their unrated equivalents. These securities may be issued by:
 
• U.S. and foreign companies;
• U.S. and foreign banks;
• U.S. and foreign governments;
• U.S. agencies, states and municipalities; and
• international organizations such as the World Bank and the International Monetary Fund.

The fund may also invest in repurchase agreements based on these securities.

The fund maintains a dollar-weighted average maturity of 60 days or less and a dollar-weighted average life of 120 days or less. Unlike the fund’s dollar-weighted average maturity, the fund’s dollar-weighted average life is calculated without reference to the re-set dates of variable rate debt obligations held by the fund. The fund does not invest in securities with remaining maturities of more than 13 months (in the case of securities in the highest rating category for short-term debt obligations assigned by nationally recognized statistical rating organizations (or unrated equivalents)) or 45 days (in the case of securities in the second-highest rating category (or unrated equivalents)) (Second Tier securities). The fund may not invest more than 3% of its total assets in Second Tier securities or more than 0.50% in Second Tier securities of a single issuer.

The fund will not acquire any security if, after doing so, more than 5% of its total assets would be invested in illiquid securities. An “illiquid security” is a security that cannot be sold or disposed of in the ordinary course of business within seven calendar days at approximately the value ascribed to it by the fund.

In managing the fund, the subadviser searches aggressively for the best values on securities that meet the fund’s credit and maturity requirements. The subadviser tends to favor corporate securities and looks for relative yield advantages between, for example, a company’s secured and unsecured short-term debt obligations.
Risk [Heading] rr_RiskHeading Principal risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

The fund intends to maintain a stable $1.00 share price. Although the fund seeks to maintain a stable $1.00 share price, the value of the fund’s shares could go down in price, meaning that you could lose money by investing in the fund. An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Many factors influence a mutual fund’s performance.

Instability in the financial markets has led many governments, including the United States government, to take a number of unprecedented actions designed to support certain financial institutions and segments of the financial markets that have experienced extreme volatility and, in some cases, a lack of liquidity. Federal, state and other governments, and their regulatory agencies or self-regulatory organizations, may take actions that affect the regulation of the instruments in which the fund invests, or the issuers of such instruments, in ways that are unforeseeable. Legislation or regulation may also change the way in which the fund itself is regulated. Such legislation or regulation could limit or preclude the fund’s ability to achieve its investment objective.

Governments or their agencies may also acquire distressed assets from financial institutions and acquire ownership interests in those institutions. The implications of government ownership and disposition of these assets are unclear, and such a program may have positive or negative effects on the liquidity, valuation and performance of the fund’s portfolio holdings. Furthermore, volatile financial markets can expose the fund to greater market and liquidity risk and potential difficulty in valuing portfolio instruments held by the fund.

The fund’s main risk factors are listed below in alphabetical order. Before investing, be sure to read the additional descriptions of these risks beginning on page 5 of the prospectus.

Changing distribution levels risk The amount of the distributions paid by the fund generally depends on the amount of income received by the fund on the securities it holds.

Fixed-income securities risk Fixed-income securities are affected by changes in interest rates and credit quality. A rise in interest rates typically causes bond prices to fall. The longer the average maturity of the bonds held by the fund, the more sensitive the fund is likely to be to interest rate changes. There is the possibility that the issuer of the security will not repay all or a portion of the principal borrowed and will not make all interest payments.

Foreign securities risk As compared to U.S. companies, there may be less publicly available information relating to foreign companies. Foreign securities may be subject to foreign taxes. The value of foreign securities is subject to adverse political and economic developments.

Issuer risk An issuer of a security may perform poorly and, therefore, the value of its stocks and bonds may decline. An issuer of securities held by the fund could default or have its credit rating downgraded.
Risk Closing [Text Block] rr_RiskClosingTextBlock Although the fund seeks to maintain a stable $1.00 share price, the value of the fund’s shares could go down in price, meaning that you could lose money by investing in the fund. An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Risk Money Market Fund [Text] rr_RiskMoneyMarketFund Although the fund seeks to maintain a stable $1.00 share price, the value of the fund’s shares could go down in price, meaning that you could lose money by investing in the fund.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Past performance jhci26262_FundPastPerformanceAbstract  
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Past performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

Calendar year and average annual total returns The following performance information in the bar chart and table below illustrates the variability of the fund’s returns and provides some indication of the risks of investing in the fund by showing changes in the fund’s performance from year to year. However, past performance does not indicate future results. All figures assume dividend reinvestment. Performance for the fund is updated daily, monthly and quarterly and may be obtained at our Web site: www.jhfunds.com/FundPerformance, or by calling Signature Services at 1-800-225-5291 between 8:00 A.M. and 7:00 P.M., Eastern Time, on most business days.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following performance information in the bar chart and table below illustrates the variability of the fund’s returns and provides some indication of the risks of investing in the fund by showing changes in the fund’s performance from year to year.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture However, past performance does not indicate future results.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock Performance for the fund is updated daily, monthly and quarterly and may be obtained at our Web site: www.jhfunds.com/FundPerformance, or by calling Signature Services at 1-800-225-5291 between 8:00 A.M. and 7:00 P.M., Eastern Time, on most business days.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.jhfunds.com/FundPerformance
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-800-225-5291
Annual Total Returns rr_BarChartTableAbstract  
Bar Chart [Heading] rr_BarChartHeading Calendar year total returns — Class A (%)
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Year-to-date total return The fund’s total return for the six months ended June 30, 2011 was 0.00%.

Best quarter: Q1 ’01, 1.21%

Worst quarter: Q3 ’10, 0.00%
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Caption rr_AverageAnnualReturnCaption Average annual total returns (%) as of 12-31-10
Money Market Seven Day Yield, Caption [Text] rr_MoneyMarketSevenDayYieldCaption

Yield information

For the fund’s 7-day effective yield, call 1-800-225-5291.
Money Market Seven Day Yield Phone rr_MoneyMarketSevenDayYieldPhone 1-800-225-5291
Money Market Fund | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol JHMXX
Shareholder fees rr_ShareholderFeesAbstract  
Shareholder Fees Column [Text] rr_ShareholderFeesColumnName Class A
Maximum front-end sales charge (load) on purchases as a % of purchase price rr_MaximumCumulativeSalesChargeOverOther none
Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less rr_MaximumDeferredSalesChargeOverOther none
Annual fund operating expenses rr_OperatingExpensesAbstract  
Operating Expenses Column [Text] rr_OperatingExpensesColumnName Class A
Management fee rr_ManagementFeesOverAssets 0.50%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.30% [1]
Total annual fund operating expenses rr_ExpensesOverAssets 1.05%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.20%) [2],[3]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 0.85%
Expense example rr_ExpenseExampleAbstract  
Expense Example, By Year, Column [Text] rr_ExpenseExampleByYearColumnName Class A
1 Year rr_ExpenseExampleYear01 87
3 Years rr_ExpenseExampleYear03 314
5 Years rr_ExpenseExampleYear05 560
10 Years rr_ExpenseExampleYear10 1,265
Expense Example, No Redemption rr_ExpenseExampleNoRedemptionAbstract  
Expense Example, No Redemption, By Year, Column [Text] rr_ExpenseExampleNoRedemptionByYearColumnName Class A
1 Year rr_ExpenseExampleNoRedemptionYear01 87
3 Years rr_ExpenseExampleNoRedemptionYear03 314
5 Years rr_ExpenseExampleNoRedemptionYear05 560
10 Years rr_ExpenseExampleNoRedemptionYear10 1,265
Annual Total Returns rr_BarChartTableAbstract  
2001 rr_AnnualReturn2001 3.37%
2002 rr_AnnualReturn2002 0.95%
2003 rr_AnnualReturn2003 0.24%
2004 rr_AnnualReturn2004 0.51%
2005 rr_AnnualReturn2005 2.37%
2006 rr_AnnualReturn2006 4.29%
2007 rr_AnnualReturn2007 4.52%
2008 rr_AnnualReturn2008 1.97%
2009 rr_AnnualReturn2009 0.03%
2010 rr_AnnualReturn2010 0.01%
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return The fund’s total return for the six months ended
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2011
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 0.00%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2001
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 1.21%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2010
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn 0.00%
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Column rr_AverageAnnualReturnColumnName Class A
1 Year rr_AverageAnnualReturnYear01 0.01%
5 Year rr_AverageAnnualReturnYear05 2.14%
10 Year rr_AverageAnnualReturnYear10 1.81%
Money Market Fund | Class B
  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol TSMXX
Shareholder fees rr_ShareholderFeesAbstract  
Shareholder Fees Column [Text] rr_ShareholderFeesColumnName Class B
Maximum front-end sales charge (load) on purchases as a % of purchase price rr_MaximumCumulativeSalesChargeOverOther none
Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less rr_MaximumDeferredSalesChargeOverOther 5.00%
Annual fund operating expenses rr_OperatingExpensesAbstract  
Operating Expenses Column [Text] rr_OperatingExpensesColumnName Class B
Management fee rr_ManagementFeesOverAssets 0.50%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.30% [1]
Total annual fund operating expenses rr_ExpensesOverAssets 1.80%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [2]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.70%
Expense example rr_ExpenseExampleAbstract  
Expense Example, By Year, Column [Text] rr_ExpenseExampleByYearColumnName Class B
1 Year rr_ExpenseExampleYear01 673
3 Years rr_ExpenseExampleYear03 857
5 Years rr_ExpenseExampleYear05 1,166
10 Years rr_ExpenseExampleYear10 1,910
Expense Example, No Redemption rr_ExpenseExampleNoRedemptionAbstract  
Expense Example, No Redemption, By Year, Column [Text] rr_ExpenseExampleNoRedemptionByYearColumnName Class B
1 Year rr_ExpenseExampleNoRedemptionYear01 173
3 Years rr_ExpenseExampleNoRedemptionYear03 557
5 Years rr_ExpenseExampleNoRedemptionYear05 966
10 Years rr_ExpenseExampleNoRedemptionYear10 1,910
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Column rr_AverageAnnualReturnColumnName Class B
1 Year rr_AverageAnnualReturnYear01 (4.99%)
5 Year rr_AverageAnnualReturnYear05 1.44%
10 Year rr_AverageAnnualReturnYear10 1.28%
Money Market Fund | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Trading Symbol dei_TradingSymbol JMCXX
Shareholder fees rr_ShareholderFeesAbstract  
Shareholder Fees Column [Text] rr_ShareholderFeesColumnName Class C
Maximum front-end sales charge (load) on purchases as a % of purchase price rr_MaximumCumulativeSalesChargeOverOther none
Maximum deferred sales charge (load) as a % of purchase or sale price, whichever is less rr_MaximumDeferredSalesChargeOverOther 1.00%
Annual fund operating expenses rr_OperatingExpensesAbstract  
Operating Expenses Column [Text] rr_OperatingExpensesColumnName Class C
Management fee rr_ManagementFeesOverAssets 0.50%
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.30% [1]
Total annual fund operating expenses rr_ExpensesOverAssets 1.80%
Contractual expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [2]
Total annual fund operating expenses after expense reimbursements rr_NetExpensesOverAssets 1.70%
Expense example rr_ExpenseExampleAbstract  
Expense Example, By Year, Column [Text] rr_ExpenseExampleByYearColumnName Class C
1 Year rr_ExpenseExampleYear01 273
3 Years rr_ExpenseExampleYear03 557
5 Years rr_ExpenseExampleYear05 966
10 Years rr_ExpenseExampleYear10 2,108
Expense Example, No Redemption rr_ExpenseExampleNoRedemptionAbstract  
Expense Example, No Redemption, By Year, Column [Text] rr_ExpenseExampleNoRedemptionByYearColumnName Class C
1 Year rr_ExpenseExampleNoRedemptionYear01 173
3 Years rr_ExpenseExampleNoRedemptionYear03 557
5 Years rr_ExpenseExampleNoRedemptionYear05 966
10 Years rr_ExpenseExampleNoRedemptionYear10 2,108
Average Annual Total Returns rr_AverageAnnualReturnAbstract  
Column rr_AverageAnnualReturnColumnName Class C
1 Year rr_AverageAnnualReturnYear01 (0.99%)
5 Year rr_AverageAnnualReturnYear05 1.63%
10 Year rr_AverageAnnualReturnYear10 1.27%
[1] "Other expenses" reflect a change in the contractual transfer agency and service agreement effective July 1, 2010.
[2] The adviser has contractually agreed to limit the maximum annual rate of management fee to 0.40% of the fund's average daily net assets. This expense limitation expires on July 31, 2012, unless renewed by mutual agreement of the fund and the adviser based upon a determination that this is appropriate under the circumstances at that time.
[3] The distributor has contractually agreed to limit the 12b-1 fee on Class A shares to 0.15% of the fund's average daily net assets. This expense limitation expires on July 31, 2012, unless renewed by mutual agreement of the fund and the distributor based upon a determination that this is appropriate under the circumstances at that time.