Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	Variable Insurance Products Fund V
02.28 VIP Target Volatility Portfolio Service, Service 2 PRO-13 | Target Volatility Portfolio
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Fund Summary Fund/Class:VIP Target Volatility Portfolio/Service Class, Service Class 2
Objective [Heading]	rr_ObjectiveHeading	Investment Objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The fund seeks total return.
Expense [Heading]	rr_ExpenseHeading	Fee Table
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The following table describes the fees and expenses that may be incurred, directly or indirectly, when you, as a variable product owner, buy and hold interests in a separate account that invests in shares of the fund. The table does not include any fees or other expenses of any variable annuity or variable life insurance product; if it did, overall fees and expenses would be higher.
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	Fees
(fees paid directly from your investment)	rr_ShareholderFeeOther
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	Annual Operating Expenses (expenses that you pay each year as a % of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	April 30, 2024. In addition, FMR has contractually agreed to reimburse 0.10% of class-level expenses for Service Class and Service Class 2. This arrangement will remain in effect for at least one year from the effective date of the prospectus, and will remain in effect thereafter as long as Service Class and Service Class 2 continue to be sold to unaffiliated insurance companies
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio Turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The fund will not incur transaction costs, such as commissions, when it buys and sells shares of underlying Fidelity funds, but it may incur transaction costs when it buys and sells other types of securities (including exchange traded funds (ETFs) and futures) directly (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 64% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	64.00%
Acquired Fund Fees and Expenses, Based on Estimates [Text]	rr_AcquiredFundFeesAndExpensesBasedOnEstimates	Acquired fund fees and expenses based on estimated amounts for the current fiscal year.
Expenses Restated to Reflect Current [Text]	rr_ExpensesRestatedToReflectCurrent	Adjusted to reflect current fees.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]	rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees	Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. This example does not include any fees or other expenses of any variable annuity or variable life insurance product; if it did, overall expenses would be higher. For every $10,000 invested, here's how much you, as a variable product owner, would pay in total expenses if all interests in a separate account that invests in shares of the fund were redeemed at the end of each time period indicated:
Strategy [Heading]	rr_StrategyHeading	Principal Investment Strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Seeking to maintain a target portfolio volatility of 10% over a one-year period. Volatility is a statistical measurement of the magnitude of up and down fluctuations in the value of a financial instrument or index over time. While attempts are made to manage the fund’s volatility, there can be no guarantee that the fund will maintain its target volatility. Normally investing in a combination of underlying Fidelity funds, ETFs, and futures. Potentially investing up to 30% of total assets in index futures. Managing underlying holdings to achieve portfolio characteristics similar to the Fidelity VIP Target Volatility Portfolio Composite Index℠ over the long-term, which is a hypothetical representation of the performance of the asset classes in which the fund intends to invest, based on combinations of the following unmanaged indexes: Dow Jones U.S. Total Stock Market Index℠ (equities); MSCI ACWI ex USA Index (international equities); Bloomberg U.S. Aggregate Bond Index (bonds); and Bloomberg U.S. 3 Month Treasury Bellwether Index (short-term investments). Using proprietary fundamental and quantitative fund research, considering factors including fund performance, a fund manager's experience and investment style, and fund characteristics such as expense ratio, asset size, and portfolio turnover to select underlying funds.
Risk [Heading]	rr_RiskHeading	Principal Investment Risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	Investing in Other Funds. The fund bears all risks of investment strategies employed by the underlying funds, including the risk that the underlying funds will not meet their investment objectives. Investing for Volatility Management. There can be no guarantee that the fund will maintain its target volatility level. Furthermore, while the fund’s volatility forecasting model seeks competitive returns with more consistent volatility of returns, the attainment and maintenance of the target volatility level does not ensure that the fund will deliver competitive returns. Volatility may result in rapid and dramatic price swings. Using Derivatives to Manage Volatility. The fund’s use of derivatives may reduce its returns and/or increase volatility. Volatility is a statistical measurement of the magnitude of up and down fluctuations in the value of a financial instrument or index over time. A risk of the fund’s use of derivatives is that the fluctuations in their values may not correlate perfectly with the overall securities markets. The possible lack of a liquid secondary market for derivatives and the resulting inability of the fund to sell or otherwise close a derivatives position could expose the fund to losses and could make derivatives more difficult for the fund to value accurately. Derivatives may give rise to a form of leverage and may expose the fund to greater risk and increase its costs. Recent legislation calls for new regulation of the derivatives markets. The extent and impact of the regulation is not yet known and may not be known for some time. New regulation may make derivatives more costly, may limit the availability of derivatives, or may otherwise adversely affect the value or performance of derivatives. Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. Interest Rate Changes. Interest rate increases can cause the price of a debt or money market security to decrease. Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. The extent of economic development; political stability; market depth, infrastructure, and capitalization; and regulatory oversight can be less than in more developed markets. Emerging markets typically have less established legal, accounting and financial reporting systems than those in more developed markets, which may reduce the scope or quality of financial information available to investors. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile. Geographic Exposure. Social, political, and economic conditions and changes in regulatory, tax, or economic policy in a country or region could significantly affect the market in that country or region. Industry Exposure. Market conditions, interest rates, and economic, regulatory, or financial developments could significantly affect a single industry or group of related industries. Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change. Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments and can be difficult to resell. Counterparty Risk.  The counterparty to an over-the-counter derivatives contract may be unable or unwilling to make timely principal, interest or settlement payments, or otherwise to honor its obligations. Leverage Risk. Leverage can increase market exposure, magnify investment risks, and cause losses to be realized more quickly. Investing in ETFs. ETFs may trade in the secondary market at prices below the value of their underlying portfolios and may not be liquid. ETFs that track an index are subject to tracking error and may be unable to sell poorly performing assets that are included in their index or other benchmark. Commodity-Linked Investing. The value of commodities and commodity-linked investments may be affected by the performance of the overall commodities markets as well as weather, political, tax, and other regulatory and market developments. Commodity-linked investments may be more volatile and less liquid than the underlying commodity, instruments, or measures. Commodity Futures. Investments in commodity futures contracts are also subject to the risk of the failure of any of the exchanges on which an underlying fund's positions trade or of its clearinghouses or counterparties. In addition, certain commodity exchanges limit fluctuations in certain futures contract prices during a single day by regulations referred to as "daily price fluctuation limits" or "daily limits." Under such daily limits, during a single trading day no trades may be executed at prices beyond the daily limit. If triggered, these limits could prevent the underlying fund from liquidating unfavorable positions and subject the underlying fund to losses or prevent it from entering into desired trades during the particular trading day. You could lose money by investing in the fund.
Risk Lose Money [Text]	rr_RiskLoseMoney	You could lose money by investing in the fund.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Returns for shares of the fund do not include the effect of any sales charges or other expenses of any variable annuity or variable life insurance product; if they did, returns for shares of the fund would be lower. Past performance is not an indication of future performance.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	Past performance is not an indication of future performance.
Bar Chart [Heading]	rr_BarChartHeading	Year-by-Year Returns
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	Returns for shares of the fund do not include the effect of any sales charges or other expenses of any variable annuity or variable life insurance product; if they did, returns for shares of the fund would be lower.
Annual Return, Inception Date	rr_AnnualReturnInceptionDate	Feb. 13, 2013
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Returns
02.28 VIP Target Volatility Portfolio Service, Service 2 PRO-13 | Target Volatility Portfolio | VIP Target Volatility Portfolio-Service VIP
Risk/Return:	rr_RiskReturnAbstract
Management fee	rr_ManagementFeesOverAssets	0.20%	[1]
Distribution and/or Service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.10%
Other expenses	rr_OtherExpensesOverAssets	0.01%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.52%	[2]
Total annual operating expenses	rr_ExpensesOverAssets	0.83%	[3]
Fee waiver and/or expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.15%	[4]
Total annual operating expenses after fee waiver and/or expense reimbursement	rr_NetExpensesOverAssets	0.68%	[3]
1 year	rr_ExpenseExampleYear01	$ 69
3 years	rr_ExpenseExampleYear03	235
5 years	rr_ExpenseExampleYear05	432
10 years	rr_ExpenseExampleYear10	$ 998
2014	rr_AnnualReturn2014	5.94%
2015	rr_AnnualReturn2015	(1.22%)
2016	rr_AnnualReturn2016	5.30%
2017	rr_AnnualReturn2017	16.39%
2018	rr_AnnualReturn2018	(5.81%)
2019	rr_AnnualReturn2019	18.81%
2020	rr_AnnualReturn2020	9.13%
2021	rr_AnnualReturn2021	12.16%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Highest Quarter Return
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2020
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	9.88%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Lowest Quarter Return
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Mar. 31, 2020
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(11.72%)
02.28 VIP Target Volatility Portfolio Service, Service 2 PRO-13 | Target Volatility Portfolio | VIP Target Volatility Portfolio-Service 2 VIP
Risk/Return:	rr_RiskReturnAbstract
Management fee	rr_ManagementFeesOverAssets	0.20%	[1]
Distribution and/or Service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.01%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.52%	[2]
Total annual operating expenses	rr_ExpensesOverAssets	0.98%	[3]
Fee waiver and/or expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.15%	[4]
Total annual operating expenses after fee waiver and/or expense reimbursement	rr_NetExpensesOverAssets	0.83%	[3]
1 year	rr_ExpenseExampleYear01	$ 85
3 years	rr_ExpenseExampleYear03	283
5 years	rr_ExpenseExampleYear05	513
10 years	rr_ExpenseExampleYear10	$ 1,174
02.28 VIP Target Volatility Portfolio Service, Service 2 PRO-13 | Target Volatility Portfolio | Return Before Taxes | VIP Target Volatility Portfolio-Service VIP
Risk/Return:	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Service Class
Past 1 year	rr_AverageAnnualReturnYear01	12.16%
Past 5 years	rr_AverageAnnualReturnYear05	9.78%
Since Inception	rr_AverageAnnualReturnSinceInception	8.18%	[5]
02.28 VIP Target Volatility Portfolio Service, Service 2 PRO-13 | Target Volatility Portfolio | Return Before Taxes | VIP Target Volatility Portfolio-Service 2 VIP
Risk/Return:	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Service Class 2
Past 1 year	rr_AverageAnnualReturnYear01	12.03%
Past 5 years	rr_AverageAnnualReturnYear05	9.63%
Since Inception	rr_AverageAnnualReturnSinceInception	8.02%	[5]
02.28 VIP Target Volatility Portfolio Service, Service 2 PRO-13 | Target Volatility Portfolio | SP001
Risk/Return:	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	S&P 500® Index
Past 1 year	rr_AverageAnnualReturnYear01	28.71%
Past 5 years	rr_AverageAnnualReturnYear05	18.47%
Since Inception	rr_AverageAnnualReturnSinceInception	15.97%	[5]
02.28 VIP Target Volatility Portfolio Service, Service 2 PRO-13 | Target Volatility Portfolio | F1806
Risk/Return:	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Fidelity VIP Target Volatility Portfolio Composite Index℠
Past 1 year	rr_AverageAnnualReturnYear01	11.85%
Past 5 years	rr_AverageAnnualReturnYear05	10.76%
Since Inception	rr_AverageAnnualReturnSinceInception	8.92%	[5]

[1] ^(a)Adjusted to reflect current fees.

[2] ^(b)Acquired fund fees and expenses based on estimated amounts for the current fiscal year.

[3] ^(c)Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

[4] ^(d)Fidelity Management & Research Company LLC (FMR) has contractually agreed to waive 0.05% of the fund's management fee. This arrangement will remain in effect through April 30, 2024. In addition, FMR has contractually agreed to reimburse 0.10% of class-level expenses for Service Class and Service Class 2. This arrangement will remain in effect for at least one year from the effective date of the prospectus, and will remain in effect thereafter as long as Service Class and Service Class 2 continue to be sold to unaffiliated insurance companies. If Service Class and Service Class 2 are no longer sold to unaffiliated insurance companies, FMR, in its sole discretion, may discontinue the arrangement.

[5] ^(a)From February 13, 2013