| Form N-CSR Cover | 12 Months Ended |
| Nov. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Fidelity Mt. Vernon Street Trust |
| Entity Central Index Key | 0000707823 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| Shareholder Report | 12 Months Ended |
| Nov. 30, 2024 USD ($) shares | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Fidelity Mt. Vernon Street Trust |
| Entity Central Index Key | 0000707823 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Nov. 30, 2024 |
| Fidelity Series Growth Company Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Series Growth Company Fund |
| Class Name | Fidelity® Series Growth Company Fund |
| Trading Symbol | FCGSX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Series Growth Company Fund for the period December 1, 2023 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Series Growth Company Fund $ A 0.00 % B A Amount represents less than $.50 B Amount represents less than 0.005% |
| Expenses Paid, Amount | $ 0 |
| Expense Ratio, Percent | 0% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B24"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the past 10 years? CUMULATIVE PERFORMANCE November 30, 2014 through November 30, 2024. Initial investment of $10,000. Fidelity® Series Growth Company Fund $10,000 $10,894 $11,262 $15,553 $16,635 $20,502 $34,528 $46,065 $32,891 $41,520 $60,264 Russell 3000® Growth Index $10,000 $10,614 $11,064 $14,412 $15,585 $18,746 $25,444 $32,923 $25,814 $32,155 $44,425 Russell 3000® Index $10,000 $10,258 $11,111 $13,585 $14,336 $16,557 $19,706 $24,897 $22,207 $25,007 $33,631 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year 10 Year Fidelity® Series Growth Company Fund 45.14% 24.07% 19.68% Russell 3000® Growth Index 38.16% 18.84% 16.08% Russell 3000® Index 34.49% 15.23% 12.89% Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 17,953,449,944 |
| Holdings Count | shares | 602 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 27% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 602 Total Advisory Fee $ Portfolio Turnover 27 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 48.3 Consumer Discretionary 16.7 Health Care 11.8 Communication Services 11.2 Financials 4.3 Industrials 3.9 Consumer Staples 2.5 Materials 0.6 Energy 0.3 Real Estate 0.1 Utilities 0.0 Common Stocks 97.9 Preferred Stocks 1.8 Bonds 0.0 Preferred Securities 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets) United States 96.3 Netherlands 0.7 Switzerland 0.6 Canada 0.5 India 0.4 China 0.3 Belgium 0.2 Taiwan 0.2 Denmark 0.2 Others 0.6 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 16.1 Apple Inc 9.6 Microsoft Corp 7.0 Amazon.com Inc 6.9 Alphabet Inc Class A 3.4 Meta Platforms Inc Class A 3.4 Alphabet Inc Class C 2.2 Eli Lilly & Co 2.2 Salesforce Inc 1.5 Tesla Inc 1.5 53.8 |
| Fidelity Advisor Growth Strategies Fund - Class Z | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Growth Strategies Fund |
| Class Name | Fidelity Advisor® Growth Strategies Fund Class Z |
| Trading Symbol | FGSLX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Growth Strategies Fund for the period October 8, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class Z A $ 0.67 % A Expenses for the full reporting period would be higher. |
| Expenses Paid, Amount | $ 11 |
| Expense Ratio, Percent | 0.67% |
| Expenses Short Period Footnote [Text Block] | Expenses for the full reporting period would be higher. |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Net Assets | $ 3,773,807,408 |
| Holdings Count | shares | 126 |
| Advisory Fees Paid, Amount | $ 23,563,900 |
| Investment Company Portfolio Turnover | 93% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 126 Total Advisory Fee $ Portfolio Turnover 93 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Industrials 29.0 Information Technology 23.8 Financials 15.1 Consumer Discretionary 10.1 Health Care 6.8 Energy 4.1 Communication Services 3.2 Utilities 2.5 Materials 2.1 Consumer Staples 2.0 Real Estate 1.0 Common Stocks 99.7 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets) United States 96.8 Brazil 1.1 Korea (South) 0.9 Israel 0.9 United Kingdom 0.3 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Palantir Technologies Inc Class A 4.4 Axon Enterprise Inc 3.5 AppLovin Corp Class A 3.3 WW Grainger Inc 2.3 Fair Isaac Corp 2.3 Vistra Corp 2.2 Ameriprise Financial Inc 2.0 Trade Desk Inc (The) Class A 1.9 Coinbase Global Inc Class A 1.7 Datadog Inc Class A 1.6 25.2 |
| Fidelity Advisor Growth Strategies Fund - Class I | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Growth Strategies Fund |
| Class Name | Fidelity Advisor® Growth Strategies Fund Class I |
| Trading Symbol | FGSJX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Growth Strategies Fund for the period October 8, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I A $ 0.75 % A Expenses for the full reporting period would be higher. |
| Expenses Paid, Amount | $ 12 |
| Expense Ratio, Percent | 0.75% |
| Expenses Short Period Footnote [Text Block] | Expenses for the full reporting period would be higher. |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Net Assets | $ 3,773,807,408 |
| Holdings Count | shares | 126 |
| Advisory Fees Paid, Amount | $ 23,563,900 |
| Investment Company Portfolio Turnover | 93% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 126 Total Advisory Fee $ Portfolio Turnover 93 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Industrials 29.0 Information Technology 23.8 Financials 15.1 Consumer Discretionary 10.1 Health Care 6.8 Energy 4.1 Communication Services 3.2 Utilities 2.5 Materials 2.1 Consumer Staples 2.0 Real Estate 1.0 Common Stocks 99.7 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets) United States 96.8 Brazil 1.1 Korea (South) 0.9 Israel 0.9 United Kingdom 0.3 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Palantir Technologies Inc Class A 4.4 Axon Enterprise Inc 3.5 AppLovin Corp Class A 3.3 WW Grainger Inc 2.3 Fair Isaac Corp 2.3 Vistra Corp 2.2 Ameriprise Financial Inc 2.0 Trade Desk Inc (The) Class A 1.9 Coinbase Global Inc Class A 1.7 Datadog Inc Class A 1.6 25.2 |
| Fidelity New Millennium Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® New Millennium Fund® |
| Class Name | Fidelity® New Millennium Fund® |
| Trading Symbol | FMILX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® New Millennium Fund® for the period December 1, 2023 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® New Millennium Fund® $ 0.77 % |
| Expenses Paid, Amount | $ 92 |
| Expense Ratio, Percent | 0.77% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B97"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the past 10 years? CUMULATIVE PERFORMANCE November 30, 2014 through November 30, 2024. Initial investment of $10,000. Fidelity® New Millennium Fund® $10,000 $10,008 $10,866 $13,113 $13,532 $15,267 $15,664 $19,354 $20,990 $24,068 $33,259 S&P 500® Index $10,000 $10,275 $11,103 $13,642 $14,498 $16,834 $19,773 $25,294 $22,964 $26,142 $35,002 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year 10 Year Fidelity® New Millennium Fund® 38.19% 16.85% 12.77% S&P 500® Index 33.89% 15.77% 13.35% Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 5,082,068,074 |
| Holdings Count | shares | 155 |
| Advisory Fees Paid, Amount | $ 34,546,621 |
| Investment Company Portfolio Turnover | 44% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 155 Total Advisory Fee $ Portfolio Turnover 44 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 26.6 Financials 13.8 Industrials 13.0 Consumer Discretionary 11.3 Health Care 9.6 Communication Services 8.9 Energy 4.0 Real Estate 3.9 Consumer Staples 3.7 Materials 3.3 Utilities 1.3 Common Stocks 98.9 Preferred Stocks 0.5 Short-Term Investments and Net Other Assets (Liabilities) 0.6 ASSET ALLOCATION (% of Fund's net assets) United States 94.1 Canada 1.3 United Kingdom 1.2 Italy 0.9 Germany 0.6 Taiwan 0.6 Spain 0.4 China 0.4 Netherlands 0.3 Others 0.2 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 6.9 Microsoft Corp 5.9 Apple Inc 5.6 Amazon.com Inc 3.6 Meta Platforms Inc Class A 2.6 Alphabet Inc Class A 2.5 UnitedHealth Group Inc 1.7 Visa Inc Class A 1.7 Eli Lilly & Co 1.5 Space Exploration Technologies Corp 1.4 33.4 |
| Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since December 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by January 29, 2025 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-8544 or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Performance adjustment fee The fund's transfer agent and pricing & bookkeeping fees were changed to a fixed rate effective December 1, 2023, through February 29, 2024, in anticipation of the transition to a new management fee structure. Effective March 1, 2024, the fund's management contract was amended to incorporate administrative services previously covered under separate services agreements (transfer agent and pricing & bookkeeping). The amended contract incorporates a basic fee rate that may vary by class (subject to a performance adjustment). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class's management fee. |
| Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Performance adjustment fee The fund's transfer agent and pricing & bookkeeping fees were changed to a fixed rate effective December 1, 2023, through February 29, 2024, in anticipation of the transition to a new management fee structure. Effective March 1, 2024, the fund's management contract was amended to incorporate administrative services previously covered under separate services agreements (transfer agent and pricing & bookkeeping). The amended contract incorporates a basic fee rate that may vary by class (subject to a performance adjustment). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class's management fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since December 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by January 29, 2025 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-8544 or by sending an e-mail to fidfunddocuments fidelity.com . |
| Updated Prospectus Phone Number | 1-800-544-8544</span>" id="sjs-B111"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-8544</span> |
| Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B112"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
| Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B113"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
| Fidelity Advisor Growth Strategies Fund - Class C | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Growth Strategies Fund |
| Class Name | Fidelity Advisor® Growth Strategies Fund Class C |
| Trading Symbol | FGSHX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Growth Strategies Fund for the period October 8, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C A $ 1.75 % A Expenses for the full reporting period would be higher. |
| Expenses Paid, Amount | $ 28 |
| Expense Ratio, Percent | 1.75% |
| Expenses Short Period Footnote [Text Block] | Expenses for the full reporting period would be higher. |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Net Assets | $ 3,773,807,408 |
| Holdings Count | shares | 126 |
| Advisory Fees Paid, Amount | $ 23,563,900 |
| Investment Company Portfolio Turnover | 93% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 126 Total Advisory Fee $ Portfolio Turnover 93 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Industrials 29.0 Information Technology 23.8 Financials 15.1 Consumer Discretionary 10.1 Health Care 6.8 Energy 4.1 Communication Services 3.2 Utilities 2.5 Materials 2.1 Consumer Staples 2.0 Real Estate 1.0 Common Stocks 99.7 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets) United States 96.8 Brazil 1.1 Korea (South) 0.9 Israel 0.9 United Kingdom 0.3 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Palantir Technologies Inc Class A 4.4 Axon Enterprise Inc 3.5 AppLovin Corp Class A 3.3 WW Grainger Inc 2.3 Fair Isaac Corp 2.3 Vistra Corp 2.2 Ameriprise Financial Inc 2.0 Trade Desk Inc (The) Class A 1.9 Coinbase Global Inc Class A 1.7 Datadog Inc Class A 1.6 25.2 |
| Fidelity Advisor Growth Strategies Fund - Class A | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Growth Strategies Fund |
| Class Name | Fidelity Advisor® Growth Strategies Fund Class A |
| Trading Symbol | FGSFX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Growth Strategies Fund for the period October 8, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A A $ 1.02 % A Expenses for the full reporting period would be higher. |
| Expenses Paid, Amount | $ 16 |
| Expense Ratio, Percent | 1.02% |
| Expenses Short Period Footnote [Text Block] | Expenses for the full reporting period would be higher. |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Net Assets | $ 3,773,807,408 |
| Holdings Count | shares | 126 |
| Advisory Fees Paid, Amount | $ 23,563,900 |
| Investment Company Portfolio Turnover | 93% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 126 Total Advisory Fee $ Portfolio Turnover 93 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Industrials 29.0 Information Technology 23.8 Financials 15.1 Consumer Discretionary 10.1 Health Care 6.8 Energy 4.1 Communication Services 3.2 Utilities 2.5 Materials 2.1 Consumer Staples 2.0 Real Estate 1.0 Common Stocks 99.7 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets) United States 96.8 Brazil 1.1 Korea (South) 0.9 Israel 0.9 United Kingdom 0.3 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Palantir Technologies Inc Class A 4.4 Axon Enterprise Inc 3.5 AppLovin Corp Class A 3.3 WW Grainger Inc 2.3 Fair Isaac Corp 2.3 Vistra Corp 2.2 Ameriprise Financial Inc 2.0 Trade Desk Inc (The) Class A 1.9 Coinbase Global Inc Class A 1.7 Datadog Inc Class A 1.6 25.2 |
| Fidelity Growth Company K6 Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Growth Company K6 Fund |
| Class Name | Fidelity® Growth Company K6 Fund |
| Trading Symbol | FGKFX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Growth Company K6 Fund for the period December 1, 2023 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-835-5092 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Growth Company K6 Fund $ 0.45 % |
| Expenses Paid, Amount | $ 56 |
| Expense Ratio, Percent | 0.45% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B175"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE June 13, 2019 through November 30, 2024. Initial investment of $10,000. Fidelity® Growth Company K6 Fund $10,000 $11,190 $18,681 $24,511 $17,440 $21,935 Russell 3000® Growth Index $10,000 $11,045 $14,992 $19,398 $15,210 $18,946 Russell 3000® Index $10,000 $10,920 $12,997 $16,420 $14,646 $16,493 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund A Fidelity® Growth Company K6 Fund 46.43% 23.48% 23.77% Russell 3000® Growth Index 38.16% 18.84% 19.23% Russell 3000® Index 34.49% 15.23% 15.67% A From June 13, 2019 Visit www.401k.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Performance Inception Date | Jun. 13, 2019 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 21,266,586,651 |
| Holdings Count | shares | 576 |
| Advisory Fees Paid, Amount | $ 86,739,627 |
| Investment Company Portfolio Turnover | 22% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 576 Total Advisory Fee $ Portfolio Turnover 22 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 47.9 Consumer Discretionary 15.6 Communication Services 12.2 Health Care 12.0 Financials 4.5 Industrials 4.1 Consumer Staples 2.6 Materials 0.5 Energy 0.3 Real Estate 0.2 Utilities 0.0 Common Stocks 98.1 Preferred Stocks 1.8 Bonds 0.0 Preferred Securities 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.1 ASSET ALLOCATION (% of Fund's net assets) United States 96.3 Netherlands 0.6 Switzerland 0.6 Canada 0.5 China 0.4 India 0.3 Taiwan 0.3 Belgium 0.2 Denmark 0.2 Others 0.6 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 16.3 Apple Inc 7.2 Amazon.com Inc 5.6 Meta Platforms Inc Class A 5.1 Microsoft Corp 5.1 Alphabet Inc Class A 3.5 Oracle Corp 2.6 Eli Lilly & Co 2.2 Salesforce Inc 1.5 Alphabet Inc Class C 1.4 50.5 |
| Fidelity Advisor Growth Strategies Fund - Class M | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Growth Strategies Fund |
| Class Name | Fidelity Advisor® Growth Strategies Fund Class M |
| Trading Symbol | FGSGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Growth Strategies Fund for the period October 8, 2024 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-877-208-0098 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-877-208-0098 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class M A $ 1.25 % A Expenses for the full reporting period would be higher. |
| Expenses Paid, Amount | $ 20 |
| Expense Ratio, Percent | 1.25% |
| Expenses Short Period Footnote [Text Block] | Expenses for the full reporting period would be higher. |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Net Assets | $ 3,773,807,408 |
| Holdings Count | shares | 126 |
| Advisory Fees Paid, Amount | $ 23,563,900 |
| Investment Company Portfolio Turnover | 93% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 126 Total Advisory Fee $ Portfolio Turnover 93 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Industrials 29.0 Information Technology 23.8 Financials 15.1 Consumer Discretionary 10.1 Health Care 6.8 Energy 4.1 Communication Services 3.2 Utilities 2.5 Materials 2.1 Consumer Staples 2.0 Real Estate 1.0 Common Stocks 99.7 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets) United States 96.8 Brazil 1.1 Korea (South) 0.9 Israel 0.9 United Kingdom 0.3 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Palantir Technologies Inc Class A 4.4 Axon Enterprise Inc 3.5 AppLovin Corp Class A 3.3 WW Grainger Inc 2.3 Fair Isaac Corp 2.3 Vistra Corp 2.2 Ameriprise Financial Inc 2.0 Trade Desk Inc (The) Class A 1.9 Coinbase Global Inc Class A 1.7 Datadog Inc Class A 1.6 25.2 |
| Fidelity Growth Company Fund - Class K | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Growth Company Fund |
| Class Name | Fidelity® Growth Company Fund Class K |
| Trading Symbol | FGCKX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Growth Company Fund for the period December 1, 2023 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-835-5092 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class K $ 0.44 % |
| Expenses Paid, Amount | $ 54 |
| Expense Ratio, Percent | 0.44% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B226"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the past 10 years? CUMULATIVE PERFORMANCE November 30, 2014 through November 30, 2024. Initial investment of $10,000. Class K $10,000 $10,901 $11,292 $15,523 $16,498 $20,152 $33,528 $44,214 $31,018 $39,323 $56,766 Russell 3000® Growth Index $10,000 $10,614 $11,064 $14,412 $15,585 $18,746 $25,444 $32,923 $25,814 $32,155 $44,425 Russell 3000® Index $10,000 $10,258 $11,111 $13,585 $14,336 $16,557 $19,706 $24,897 $22,207 $25,007 $33,631 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year 10 Year Class K 44.36% 23.01% 18.96% Russell 3000® Growth Index 38.16% 18.84% 16.08% Russell 3000® Index 34.49% 15.23% 12.89% Visit www.401k.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 69,300,943,034 |
| Holdings Count | shares | 601 |
| Advisory Fees Paid, Amount | $ 299,460,055 |
| Investment Company Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 601 Total Advisory Fee $ Portfolio Turnover 18 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 48.5 Consumer Discretionary 16.9 Health Care 11.7 Communication Services 11.2 Financials 4.3 Industrials 3.8 Consumer Staples 2.5 Materials 0.5 Energy 0.3 Real Estate 0.1 Utilities 0.0 Common Stocks 97.8 Preferred Stocks 2.0 Bonds 0.0 Preferred Securities 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.2 ASSET ALLOCATION (% of Fund's net assets) United States 96.4 Netherlands 0.6 Canada 0.5 Switzerland 0.5 India 0.5 China 0.3 Belgium 0.2 Taiwan 0.2 Denmark 0.2 Others 0.6 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 16.2 Apple Inc 9.4 Microsoft Corp 7.0 Amazon.com Inc 7.0 Alphabet Inc Class A 3.6 Meta Platforms Inc Class A 3.1 Alphabet Inc Class C 2.2 Eli Lilly & Co 2.2 Salesforce Inc 1.5 Tesla Inc 1.4 53.6 |
| Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since December 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by January 29, 2025 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092 or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Performance adjustment fee The fund's transfer agent and pricing & bookkeeping fees were changed to a fixed rate effective December 1, 2023, through February 29, 2024, in anticipation of the transition to a new management fee structure. Effective March 1, 2024, the fund's management contract was amended to incorporate administrative services previously covered under separate services agreements (transfer agent and pricing & bookkeeping). The amended contract incorporates a basic fee rate that may vary by class (subject to a performance adjustment). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class's management fee. |
| Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Performance adjustment fee The fund's transfer agent and pricing & bookkeeping fees were changed to a fixed rate effective December 1, 2023, through February 29, 2024, in anticipation of the transition to a new management fee structure. Effective March 1, 2024, the fund's management contract was amended to incorporate administrative services previously covered under separate services agreements (transfer agent and pricing & bookkeeping). The amended contract incorporates a basic fee rate that may vary by class (subject to a performance adjustment). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class's management fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since December 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by January 29, 2025 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092 or by sending an e-mail to fidfunddocuments fidelity.com . |
| Updated Prospectus Phone Number | 1-800-835-5092</span>" id="sjs-B240"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span> |
| Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B241"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
| Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B242"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
| Fidelity Equity Growth K6 Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Equity Growth K6 Fund |
| Class Name | Fidelity® Equity Growth K6 Fund |
| Trading Symbol | FEGKX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Equity Growth K6 Fund for the period December 1, 2023 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-835-5092 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Equity Growth K6 Fund $ 0.45 % |
| Expenses Paid, Amount | $ 54 |
| Expense Ratio, Percent | 0.45% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B258"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE August 24, 2023 through November 30, 2024. Initial investment of $10,000. Fidelity® Equity Growth K6 Fund $10,000 $10,640 Russell 3000® Growth Index $10,000 $10,721 Russell 3000® Index $10,000 $10,455 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year Life of Fund A Fidelity® Equity Growth K6 Fund 39.15% 36.17% Russell 3000® Growth Index 38.16% 36.21% Russell 3000® Index 34.49% 30.74% A From August 24, 2023 Visit www.401k.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Performance Inception Date | Aug. 24, 2023 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 154,321,817 |
| Holdings Count | shares | 124 |
| Advisory Fees Paid, Amount | $ 331,690 |
| Investment Company Portfolio Turnover | 76% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 124 Total Advisory Fee $ Portfolio Turnover 76 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 39.4 Health Care 16.4 Consumer Discretionary 10.5 Industrials 10.5 Financials 7.9 Communication Services 7.2 Materials 1.6 Consumer Staples 1.6 Energy 1.6 Real Estate 0.7 Common Stocks 97.3 Preferred Stocks 0.1 Short-Term Investments and Net Other Assets (Liabilities) 2.6 ASSET ALLOCATION (% of Fund's net assets) United States 90.3 Taiwan 4.9 China 1.2 Brazil 0.9 Belgium 0.6 Israel 0.5 United Kingdom 0.5 Germany 0.4 Japan 0.3 Others 0.4 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 12.9 Apple Inc 10.1 Taiwan Semiconductor Manufacturing Co Ltd ADR 4.9 Microsoft Corp 4.9 Amazon.com Inc 4.9 Alphabet Inc Class A 4.7 Boston Scientific Corp 2.8 Eli Lilly & Co 2.3 Uber Technologies Inc 2.1 Mastercard Inc Class A 1.9 51.5 |
| Fidelity Growth Strategies K6 Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Growth Strategies K6 Fund |
| Class Name | Fidelity® Growth Strategies K6 Fund |
| Trading Symbol | FSKGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Growth Strategies K6 Fund for the period December 1, 2023 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Additional Information Phone Number | 1-800-835-5092 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Growth Strategies K6 Fund $ 0.45 % |
| Expenses Paid, Amount | $ 55 |
| Expense Ratio, Percent | 0.45% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • U.S. equities posted a strong advance for the 12 months ending November 30, 2024, driven by a resilient economy, the potential for artificial intelligence to drive transformative change and the Federal Reserve's long-anticipated pivot to cutting interest rates. • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B285"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the life of Fund? CUMULATIVE PERFORMANCE May 25, 2017 through November 30, 2024. Initial investment of $10,000. Fidelity® Growth Strategies K6 Fund $10,000 $10,950 $11,244 $13,849 $17,344 $21,791 $17,505 $18,776 Russell Midcap® Growth Index $10,000 $11,218 $11,814 $14,384 $18,828 $22,165 $17,340 $19,070 Russell 3000® Index $10,000 $11,090 $11,703 $13,516 $16,087 $20,324 $18,129 $20,414 2017 2018 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year Life of Fund A Fidelity® Growth Strategies K6 Fund 45.82% 14.60% 14.33% Russell Midcap® Growth Index 40.07% 13.18% 13.95% Russell 3000® Index 34.49% 15.23% 14.37% A From May 25, 2017 Visit www.401k.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Performance Inception Date | May 25, 2017 |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 553,695,130 |
| Holdings Count | shares | 126 |
| Advisory Fees Paid, Amount | $ 1,427,171 |
| Investment Company Portfolio Turnover | 95% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 126 Total Advisory Fee $ Portfolio Turnover 95 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Industrials 29.1 Information Technology 23.6 Financials 15.2 Consumer Discretionary 10.3 Health Care 6.8 Energy 4.1 Communication Services 3.2 Utilities 2.4 Materials 2.1 Consumer Staples 2.0 Real Estate 1.0 Common Stocks 99.8 Short-Term Investments and Net Other Assets (Liabilities) 0.2 ASSET ALLOCATION (% of Fund's net assets) United States 96.7 Brazil 1.2 Korea (South) 0.9 Israel 0.9 United Kingdom 0.3 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Palantir Technologies Inc Class A 4.4 Axon Enterprise Inc 3.6 AppLovin Corp Class A 3.2 WW Grainger Inc 2.3 Fair Isaac Corp 2.2 Vistra Corp 2.1 Ameriprise Financial Inc 2.0 Trade Desk Inc (The) Class A 1.9 Coinbase Global Inc Class A 1.7 Datadog Inc Class A 1.6 25.0 |
| Fidelity Growth Strategies Fund - Class K | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Growth Strategies Fund |
| Class Name | Fidelity® Growth Strategies Fund Class K |
| Trading Symbol | FAGKX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Growth Strategies Fund for the period December 1, 2023 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-835-5092 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-835-5092 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class K $ 0.68 % |
| Expenses Paid, Amount | $ 84 |
| Expense Ratio, Percent | 0.68% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B313"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the past 10 years? CUMULATIVE PERFORMANCE November 30, 2014 through November 30, 2024. Initial investment of $10,000. Class K $10,000 $10,500 $10,521 $12,816 $13,180 $16,203 $20,281 $25,440 $20,381 $21,769 $31,700 Russell Midcap® Growth Index $10,000 $10,182 $10,644 $13,308 $14,016 $17,065 $22,337 $26,296 $20,572 $22,624 $31,688 Russell 3000® Index $10,000 $10,258 $11,111 $13,585 $14,336 $16,557 $19,706 $24,897 $22,207 $25,007 $33,631 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year 10 Year Class K 45.62% 14.37% 12.23% Russell Midcap® Growth Index 40.07% 13.18% 12.22% Russell 3000® Index 34.49% 15.23% 12.89% Visit www.401k.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 3,773,807,408 |
| Holdings Count | shares | 126 |
| Advisory Fees Paid, Amount | $ 23,563,900 |
| Investment Company Portfolio Turnover | 93% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 126 Total Advisory Fee $ Portfolio Turnover 93 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Industrials 29.0 Information Technology 23.8 Financials 15.1 Consumer Discretionary 10.1 Health Care 6.8 Energy 4.1 Communication Services 3.2 Utilities 2.5 Materials 2.1 Consumer Staples 2.0 Real Estate 1.0 Common Stocks 99.7 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets) United States 96.8 Brazil 1.1 Korea (South) 0.9 Israel 0.9 United Kingdom 0.3 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Palantir Technologies Inc Class A 4.4 Axon Enterprise Inc 3.5 AppLovin Corp Class A 3.3 WW Grainger Inc 2.3 Fair Isaac Corp 2.3 Vistra Corp 2.2 Ameriprise Financial Inc 2.0 Trade Desk Inc (The) Class A 1.9 Coinbase Global Inc Class A 1.7 Datadog Inc Class A 1.6 25.2 |
| Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since December 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by January 29, 2025 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092 or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Performance adjustment fee The fund's transfer agent and pricing & bookkeeping fees were changed to a fixed rate effective December 1, 2023, through February 29, 2024, in anticipation of the transition to a new management fee structure. Effective March 1, 2024, the fund's management contract was amended to incorporate administrative services previously covered under separate services agreements (transfer agent and pricing & bookkeeping). The amended contract incorporates a basic fee rate that may vary by class (subject to a performance adjustment). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class's management fee. |
| Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Performance adjustment fee The fund's transfer agent and pricing & bookkeeping fees were changed to a fixed rate effective December 1, 2023, through February 29, 2024, in anticipation of the transition to a new management fee structure. Effective March 1, 2024, the fund's management contract was amended to incorporate administrative services previously covered under separate services agreements (transfer agent and pricing & bookkeeping). The amended contract incorporates a basic fee rate that may vary by class (subject to a performance adjustment). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class's management fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since December 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by January 29, 2025 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-835-5092 or by sending an e-mail to fidfunddocuments fidelity.com . |
| Updated Prospectus Phone Number | 1-800-835-5092</span>" id="sjs-B327"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-835-5092</span> |
| Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B328"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
| Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B329"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
| Fidelity Growth Strategies Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Growth Strategies Fund |
| Class Name | Fidelity® Growth Strategies Fund |
| Trading Symbol | FDEGX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Growth Strategies Fund for the period December 1, 2023 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Growth Strategies Fund $ 0.77 % |
| Expenses Paid, Amount | $ 94 |
| Expense Ratio, Percent | 0.77% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B346"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the past 10 years? CUMULATIVE PERFORMANCE November 30, 2014 through November 30, 2024. Initial investment of $10,000. Fidelity® Growth Strategies Fund $10,000 $10,486 $10,488 $12,756 $13,105 $16,088 $20,112 $25,202 $20,166 $21,513 $31,304 Russell Midcap® Growth Index $10,000 $10,182 $10,644 $13,308 $14,016 $17,065 $22,337 $26,296 $20,572 $22,624 $31,688 Russell 3000® Index $10,000 $10,258 $11,111 $13,585 $14,336 $16,557 $19,706 $24,897 $22,207 $25,007 $33,631 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year 10 Year Fidelity® Growth Strategies Fund 45.51% 14.24% 12.09% Russell Midcap® Growth Index 40.07% 13.18% 12.22% Russell 3000® Index 34.49% 15.23% 12.89% Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 3,773,807,408 |
| Holdings Count | shares | 126 |
| Advisory Fees Paid, Amount | $ 23,563,900 |
| Investment Company Portfolio Turnover | 93% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 126 Total Advisory Fee $ Portfolio Turnover 93 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Industrials 29.0 Information Technology 23.8 Financials 15.1 Consumer Discretionary 10.1 Health Care 6.8 Energy 4.1 Communication Services 3.2 Utilities 2.5 Materials 2.1 Consumer Staples 2.0 Real Estate 1.0 Common Stocks 99.7 Short-Term Investments and Net Other Assets (Liabilities) 0.3 ASSET ALLOCATION (% of Fund's net assets) United States 96.8 Brazil 1.1 Korea (South) 0.9 Israel 0.9 United Kingdom 0.3 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) Palantir Technologies Inc Class A 4.4 Axon Enterprise Inc 3.5 AppLovin Corp Class A 3.3 WW Grainger Inc 2.3 Fair Isaac Corp 2.3 Vistra Corp 2.2 Ameriprise Financial Inc 2.0 Trade Desk Inc (The) Class A 1.9 Coinbase Global Inc Class A 1.7 Datadog Inc Class A 1.6 25.2 |
| Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since December 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by January 29, 2025 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-8544 or by sending an e-mail to fidfunddocuments fidelity.com . The fund's transfer agent and pricing & bookkeeping fees were changed to a fixed rate effective December 1, 2023, through February 29, 2024, in anticipation of the transition to a new management fee structure. Effective March 1, 2024, the fund's management contract was amended to incorporate administrative services previously covered under separate services agreements (transfer agent and pricing & bookkeeping). The amended contract incorporates a basic fee rate that may vary by class (subject to a performance adjustment). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class's management fee. |
| Material Fund Change Expenses [Text Block] | The fund's transfer agent and pricing & bookkeeping fees were changed to a fixed rate effective December 1, 2023, through February 29, 2024, in anticipation of the transition to a new management fee structure. Effective March 1, 2024, the fund's management contract was amended to incorporate administrative services previously covered under separate services agreements (transfer agent and pricing & bookkeeping). The amended contract incorporates a basic fee rate that may vary by class (subject to a performance adjustment). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class's management fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since December 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by January 29, 2025 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-8544 or by sending an e-mail to fidfunddocuments fidelity.com . |
| Updated Prospectus Phone Number | 1-800-544-8544</span>" id="sjs-B360"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-8544</span> |
| Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B361"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
| Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B362"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
| Fidelity Growth Company Fund | |
| Shareholder Report [Line Items] | |
| Fund Name | Fidelity® Growth Company Fund |
| Class Name | Fidelity® Growth Company Fund |
| Trading Symbol | FDGRX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains information about Fidelity® Growth Company Fund for the period December 1, 2023 to November 30, 2024. |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544 or by sending an e-mail to fidfunddocuments@fidelity.com. |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 1-800-544-8544 |
| Additional Information Email | fidfunddocuments@fidelity.com |
| Additional Information Website | fundresearch.fidelity.com/prospectus/sec |
| Expenses [Text Block] | What were your Fund costs for the last year? (based on hypothetical $10,000 investment) FUND COST (PREVIOUS YEAR) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Fidelity® Growth Company Fund $ 0.52 % |
| Expenses Paid, Amount | $ 64 |
| Expense Ratio, Percent | 0.52% |
| Factors Affecting Performance [Text Block] | What affected the Fund's performance this period? • • • • • • |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of the Fund's future performance.</span>" id="sjs-B379"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">The Fund's past performance is not a good predictor of the Fund's future performance.</span> |
| Line Graph [Table Text Block] | How did the Fund perform over the past 10 years? CUMULATIVE PERFORMANCE November 30, 2014 through November 30, 2024. Initial investment of $10,000. Fidelity® Growth Company Fund $10,000 $10,890 $11,268 $15,476 $16,434 $20,058 $33,343 $43,934 $30,797 $39,032 $56,297 Russell 3000® Growth Index $10,000 $10,614 $11,064 $14,412 $15,585 $18,746 $25,444 $32,923 $25,814 $32,155 $44,425 Russell 3000® Index $10,000 $10,258 $11,111 $13,585 $14,336 $16,557 $19,706 $24,897 $22,207 $25,007 $33,631 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURNS: 1 Year 5 Year 10 Year Fidelity® Growth Company Fund 44.23% 22.92% 18.86% Russell 3000® Growth Index 38.16% 18.84% 16.08% Russell 3000® Index 34.49% 15.23% 12.89% Visit www.fidelity.com for more recent performance information. The Fund's past performance is not a good predictor of the Fund's future performance. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Net Assets | $ 69,300,943,034 |
| Holdings Count | shares | 601 |
| Advisory Fees Paid, Amount | $ 299,460,055 |
| Investment Company Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of November 30, 2024) KEY FACTS Fund Size $ Number of Holdings 601 Total Advisory Fee $ Portfolio Turnover 18 % |
| Holdings [Text Block] | MARKET SECTORS (% of Fund's net assets) Information Technology 48.5 Consumer Discretionary 16.9 Health Care 11.7 Communication Services 11.2 Financials 4.3 Industrials 3.8 Consumer Staples 2.5 Materials 0.5 Energy 0.3 Real Estate 0.1 Utilities 0.0 Common Stocks 97.8 Preferred Stocks 2.0 Bonds 0.0 Preferred Securities 0.0 Short-Term Investments and Net Other Assets (Liabilities) 0.2 ASSET ALLOCATION (% of Fund's net assets) United States 96.4 Netherlands 0.6 Canada 0.5 Switzerland 0.5 India 0.5 China 0.3 Belgium 0.2 Taiwan 0.2 Denmark 0.2 Others 0.6 GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets) |
| Largest Holdings [Text Block] | TOP HOLDINGS (% of Fund's net assets) NVIDIA Corp 16.2 Apple Inc 9.4 Microsoft Corp 7.0 Amazon.com Inc 7.0 Alphabet Inc Class A 3.6 Meta Platforms Inc Class A 3.1 Alphabet Inc Class C 2.2 Eli Lilly & Co 2.2 Salesforce Inc 1.5 Tesla Inc 1.4 53.6 |
| Material Fund Change [Text Block] | How has the Fund changed? This is a summary of certain changes to the Fund since December 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by January 29, 2025 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-8544 or by sending an e-mail to fidfunddocuments fidelity.com . The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Performance adjustment fee The fund's transfer agent and pricing & bookkeeping fees were changed to a fixed rate effective December 1, 2023, through February 29, 2024, in anticipation of the transition to a new management fee structure. Effective March 1, 2024, the fund's management contract was amended to incorporate administrative services previously covered under separate services agreements (transfer agent and pricing & bookkeeping). The amended contract incorporates a basic fee rate that may vary by class (subject to a performance adjustment). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class's management fee. |
| Material Fund Change Expenses [Text Block] | The fees associated with this class changed during the reporting year. The variations in class fees are primarily the result of the following changes: Management fee Performance adjustment fee The fund's transfer agent and pricing & bookkeeping fees were changed to a fixed rate effective December 1, 2023, through February 29, 2024, in anticipation of the transition to a new management fee structure. Effective March 1, 2024, the fund's management contract was amended to incorporate administrative services previously covered under separate services agreements (transfer agent and pricing & bookkeeping). The amended contract incorporates a basic fee rate that may vary by class (subject to a performance adjustment). The Adviser or an affiliate pays certain expenses of managing and operating the fund out of each class's management fee. |
| Summary of Change Legend [Text Block] | This is a summary of certain changes to the Fund since December 1, 2023. For more complete information, you may review the Fund's next prospectus, which we expect to be available by January 29, 2025 at fundresearch.fidelity.com/prospectus/sec or upon request at 1-800-544-8544 or by sending an e-mail to fidfunddocuments fidelity.com . |
| Updated Prospectus Phone Number | 1-800-544-8544</span>" id="sjs-B393"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">1-800-544-8544</span> |
| Updated Prospectus Email Address | fidfunddocuments@fidelity.com</span>" id="sjs-B394"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;">fidfunddocuments@fidelity.com</span> |
| Updated Prospectus Web Address | fundresearch.fidelity.com/prospectus/sec</span>" id="sjs-B395"><span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;">fundresearch.fidelity.com/prospectus/sec</span> |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | 24 Months Ended | 60 Months Ended | 72 Months Ended | 96 Months Ended | 120 Months Ended | 132 Months Ended | ||||||||||
| Nov. 30, 2024 | Nov. 30, 2024 | Nov. 30, 2024 | Nov. 30, 2024 | Nov. 30, 2024 | Nov. 30, 2024 | Nov. 30, 2024 | Nov. 30, 2023 | Nov. 30, 2022 | Nov. 30, 2021 | Nov. 30, 2020 | Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2017 | Nov. 30, 2016 | Nov. 30, 2015 | Nov. 30, 2014 | |
| C000131783_1_BBIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 34.49% | ||||||||||||||||
| C000131783_1_BBIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 15.23% | ||||||||||||||||
| C000131783_1_BBIndexMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 12.89% | ||||||||||||||||
| C000019449_0_BBIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 33.89% | ||||||||||||||||
| C000019449_0_BBIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 15.77% | ||||||||||||||||
| C000019449_0_BBIndexMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 13.35% | ||||||||||||||||
| C000212499_1_BBIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 34.49% | ||||||||||||||||
| C000212499_1_BBIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 15.23% | ||||||||||||||||
| C000212499_1_BBIndexMember_LOCMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 15.67% | ||||||||||||||||
| C000064242_1_BBIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 34.49% | ||||||||||||||||
| C000064242_1_BBIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 15.23% | ||||||||||||||||
| C000064242_1_BBIndexMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 12.89% | ||||||||||||||||
| C000244528_1_BBIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 34.49% | ||||||||||||||||
| C000244528_1_BBIndexMember_LOCMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 30.74% | ||||||||||||||||
| C000182866_1_BBIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 34.49% | ||||||||||||||||
| C000182866_1_BBIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 15.23% | ||||||||||||||||
| C000182866_1_BBIndexMember_LOCMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 14.37% | ||||||||||||||||
| C000064241_1_BBIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 34.49% | ||||||||||||||||
| C000064241_1_BBIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 15.23% | ||||||||||||||||
| C000064241_1_BBIndexMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 12.89% | ||||||||||||||||
| C000019447_1_BBIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 34.49% | ||||||||||||||||
| C000019447_1_BBIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 15.23% | ||||||||||||||||
| C000019447_1_BBIndexMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 12.89% | ||||||||||||||||
| C000019448_1_BBIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 34.49% | ||||||||||||||||
| C000019448_1_BBIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 15.23% | ||||||||||||||||
| C000019448_1_BBIndexMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 12.89% | ||||||||||||||||
| C000131783_LG_ClassMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Fidelity® Series Growth Company Fund</span>" id="sjs-H83"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Series Growth Company Fund</span> | ||||||||||||||||
| C000131783_ClassMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 10,000 | ||||||||||||||||
| C000131783_ClassMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 10,894 | ||||||||||||||||
| C000131783_ClassMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 11,262 | ||||||||||||||||
| C000131783_ClassMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 15,553 | ||||||||||||||||
| C000131783_ClassMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 16,635 | ||||||||||||||||
| C000131783_ClassMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 20,502 | ||||||||||||||||
| C000131783_ClassMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 34,528 | ||||||||||||||||
| C000131783_ClassMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 46,065 | ||||||||||||||||
| C000131783_ClassMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 32,891 | ||||||||||||||||
| C000131783_ClassMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 41,520 | ||||||||||||||||
| C000131783_ClassMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 60,264 | $ 60,264 | $ 60,264 | $ 60,264 | $ 60,264 | $ 60,264 | $ 60,264 | ||||||||||
| C000131783_LG_1_AdditionalIndexMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Growth Index</span>" id="sjs-H119"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Growth Index</span> | ||||||||||||||||
| C000131783_1_AdditionalIndexMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000131783_1_AdditionalIndexMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,614 | ||||||||||||||||
| C000131783_1_AdditionalIndexMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,064 | ||||||||||||||||
| C000131783_1_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,412 | ||||||||||||||||
| C000131783_1_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 15,585 | ||||||||||||||||
| C000131783_1_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 18,746 | ||||||||||||||||
| C000131783_1_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,444 | ||||||||||||||||
| C000131783_1_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 32,923 | ||||||||||||||||
| C000131783_1_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,814 | ||||||||||||||||
| C000131783_1_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 32,155 | ||||||||||||||||
| C000131783_1_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 44,425 | 44,425 | 44,425 | 44,425 | 44,425 | 44,425 | $ 44,425 | ||||||||||
| C000131783_LG_2_AdditionalIndexMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Index</span>" id="sjs-H155"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span> | ||||||||||||||||
| C000131783_2_AdditionalIndexMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000131783_2_AdditionalIndexMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,258 | ||||||||||||||||
| C000131783_2_AdditionalIndexMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,111 | ||||||||||||||||
| C000131783_2_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,585 | ||||||||||||||||
| C000131783_2_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,336 | ||||||||||||||||
| C000131783_2_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 16,557 | ||||||||||||||||
| C000131783_2_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 19,706 | ||||||||||||||||
| C000131783_2_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 24,897 | ||||||||||||||||
| C000131783_2_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 22,207 | ||||||||||||||||
| C000131783_2_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,007 | ||||||||||||||||
| C000131783_2_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 33,631 | 33,631 | $ 33,631 | 33,631 | 33,631 | $ 33,631 | $ 33,631 | ||||||||||
| C000131783_NoLoadClassMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 45.14% | ||||||||||||||||
| C000131783_NoLoadClassMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 24.07% | ||||||||||||||||
| C000131783_NoLoadClassMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 19.68% | ||||||||||||||||
| C000131783_0_AdditionalIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 38.16% | ||||||||||||||||
| C000131783_0_AdditionalIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 18.84% | ||||||||||||||||
| C000131783_0_AdditionalIndexMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 16.08% | ||||||||||||||||
| C000019449_LG_ClassMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Fidelity® New Millennium Fund®</span>" id="sjs-H209"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® New Millennium Fund®</span> | ||||||||||||||||
| C000019449_ClassMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000019449_ClassMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,008 | ||||||||||||||||
| C000019449_ClassMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,866 | ||||||||||||||||
| C000019449_ClassMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,113 | ||||||||||||||||
| C000019449_ClassMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,532 | ||||||||||||||||
| C000019449_ClassMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 15,267 | ||||||||||||||||
| C000019449_ClassMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 15,664 | ||||||||||||||||
| C000019449_ClassMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 19,354 | ||||||||||||||||
| C000019449_ClassMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 20,990 | ||||||||||||||||
| C000019449_ClassMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 24,068 | ||||||||||||||||
| C000019449_ClassMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 33,259 | 33,259 | $ 33,259 | 33,259 | 33,259 | $ 33,259 | $ 33,259 | ||||||||||
| C000019449_LG_1_AdditionalIndexMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | S&P 500® Index</span>" id="sjs-H245"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">S&P 500® Index</span> | ||||||||||||||||
| C000019449_1_AdditionalIndexMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000019449_1_AdditionalIndexMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,275 | ||||||||||||||||
| C000019449_1_AdditionalIndexMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,103 | ||||||||||||||||
| C000019449_1_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,642 | ||||||||||||||||
| C000019449_1_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,498 | ||||||||||||||||
| C000019449_1_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 16,834 | ||||||||||||||||
| C000019449_1_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 19,773 | ||||||||||||||||
| C000019449_1_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,294 | ||||||||||||||||
| C000019449_1_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 22,964 | ||||||||||||||||
| C000019449_1_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 26,142 | ||||||||||||||||
| C000019449_1_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 35,002 | 35,002 | $ 35,002 | $ 35,002 | 35,002 | $ 35,002 | $ 35,002 | ||||||||||
| C000019449_NoLoadClassMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 38.19% | ||||||||||||||||
| C000019449_NoLoadClassMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 16.85% | ||||||||||||||||
| C000019449_NoLoadClassMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 12.77% | ||||||||||||||||
| C000212499_LG_ClassMember_6YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Fidelity® Growth Company K6 Fund</span>" id="sjs-E290"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Growth Company K6 Fund</span> | ||||||||||||||||
| C000212499_ClassMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000212499_ClassMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,190 | ||||||||||||||||
| C000212499_ClassMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 18,681 | ||||||||||||||||
| C000212499_ClassMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 24,511 | ||||||||||||||||
| C000212499_ClassMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 17,440 | ||||||||||||||||
| C000212499_ClassMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 21,935 | 21,935 | $ 21,935 | $ 21,935 | 21,935 | $ 21,935 | 21,935 | ||||||||||
| C000212499_LG_1_AdditionalIndexMember_6YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Growth Index</span>" id="sjs-E311"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Growth Index</span> | ||||||||||||||||
| C000212499_1_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000212499_1_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,045 | ||||||||||||||||
| C000212499_1_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,992 | ||||||||||||||||
| C000212499_1_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 19,398 | ||||||||||||||||
| C000212499_1_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 15,210 | ||||||||||||||||
| C000212499_1_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 18,946 | 18,946 | 18,946 | $ 18,946 | 18,946 | 18,946 | 18,946 | ||||||||||
| C000212499_LG_2_AdditionalIndexMember_6YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Index</span>" id="sjs-E332"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span> | ||||||||||||||||
| C000212499_2_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000212499_2_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,920 | ||||||||||||||||
| C000212499_2_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 12,997 | ||||||||||||||||
| C000212499_2_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 16,420 | ||||||||||||||||
| C000212499_2_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,646 | ||||||||||||||||
| C000212499_2_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 16,493 | 16,493 | $ 16,493 | $ 16,493 | 16,493 | 16,493 | $ 16,493 | ||||||||||
| C000212499_NoLoadClassMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 46.43% | ||||||||||||||||
| C000212499_NoLoadClassMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 23.48% | ||||||||||||||||
| C000212499_NoLoadClassMember_2023-12-01_2024-11-30Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 23.77% | ||||||||||||||||
| C000212499_0_AdditionalIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 38.16% | ||||||||||||||||
| C000212499_0_AdditionalIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 18.84% | ||||||||||||||||
| C000212499_0_AdditionalIndexMember_LOCMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 19.23% | ||||||||||||||||
| C000064242_LG_ClassMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Class K</span>" id="sjs-H371"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class K</span> | ||||||||||||||||
| C000064242_ClassMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000064242_ClassMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,901 | ||||||||||||||||
| C000064242_ClassMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,292 | ||||||||||||||||
| C000064242_ClassMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 15,523 | ||||||||||||||||
| C000064242_ClassMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 16,498 | ||||||||||||||||
| C000064242_ClassMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 20,152 | ||||||||||||||||
| C000064242_ClassMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 33,528 | ||||||||||||||||
| C000064242_ClassMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 44,214 | ||||||||||||||||
| C000064242_ClassMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 31,018 | ||||||||||||||||
| C000064242_ClassMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 39,323 | ||||||||||||||||
| C000064242_ClassMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 56,766 | 56,766 | $ 56,766 | 56,766 | 56,766 | 56,766 | $ 56,766 | ||||||||||
| C000064242_LG_1_AdditionalIndexMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Growth Index</span>" id="sjs-H407"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Growth Index</span> | ||||||||||||||||
| C000064242_1_AdditionalIndexMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000064242_1_AdditionalIndexMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,614 | ||||||||||||||||
| C000064242_1_AdditionalIndexMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,064 | ||||||||||||||||
| C000064242_1_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,412 | ||||||||||||||||
| C000064242_1_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 15,585 | ||||||||||||||||
| C000064242_1_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 18,746 | ||||||||||||||||
| C000064242_1_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,444 | ||||||||||||||||
| C000064242_1_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 32,923 | ||||||||||||||||
| C000064242_1_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,814 | ||||||||||||||||
| C000064242_1_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 32,155 | ||||||||||||||||
| C000064242_1_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 44,425 | 44,425 | 44,425 | 44,425 | 44,425 | 44,425 | $ 44,425 | ||||||||||
| C000064242_LG_2_AdditionalIndexMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Index</span>" id="sjs-H443"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span> | ||||||||||||||||
| C000064242_2_AdditionalIndexMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000064242_2_AdditionalIndexMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,258 | ||||||||||||||||
| C000064242_2_AdditionalIndexMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,111 | ||||||||||||||||
| C000064242_2_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,585 | ||||||||||||||||
| C000064242_2_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,336 | ||||||||||||||||
| C000064242_2_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 16,557 | ||||||||||||||||
| C000064242_2_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 19,706 | ||||||||||||||||
| C000064242_2_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 24,897 | ||||||||||||||||
| C000064242_2_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 22,207 | ||||||||||||||||
| C000064242_2_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,007 | ||||||||||||||||
| C000064242_2_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 33,631 | $ 33,631 | $ 33,631 | 33,631 | 33,631 | $ 33,631 | $ 33,631 | ||||||||||
| C000064242_NoLoadClassMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 44.36% | ||||||||||||||||
| C000064242_NoLoadClassMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 23.01% | ||||||||||||||||
| C000064242_NoLoadClassMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 18.96% | ||||||||||||||||
| C000064242_0_AdditionalIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 38.16% | ||||||||||||||||
| C000064242_0_AdditionalIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 18.84% | ||||||||||||||||
| C000064242_0_AdditionalIndexMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 16.08% | ||||||||||||||||
| C000244528_LG_ClassMember_2YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Fidelity® Equity Growth K6 Fund</span>" id="sjs-C497"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Equity Growth K6 Fund</span> | ||||||||||||||||
| C000244528_ClassMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000244528_ClassMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 10,640 | $ 10,640 | $ 10,640 | 10,640 | 10,640 | $ 10,640 | 10,640 | ||||||||||
| C000244528_LG_1_AdditionalIndexMember_2YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Growth Index</span>" id="sjs-C506"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Growth Index</span> | ||||||||||||||||
| C000244528_1_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000244528_1_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,721 | $ 10,721 | 10,721 | 10,721 | 10,721 | 10,721 | 10,721 | ||||||||||
| C000244528_LG_2_AdditionalIndexMember_2YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Index</span>" id="sjs-C515"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span> | ||||||||||||||||
| C000244528_2_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000244528_2_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 10,455 | $ 10,455 | 10,455 | 10,455 | $ 10,455 | 10,455 | 10,455 | ||||||||||
| C000244528_NoLoadClassMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 39.15% | ||||||||||||||||
| C000244528_NoLoadClassMember_2023-12-01_2024-11-30Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 36.17% | ||||||||||||||||
| C000244528_0_AdditionalIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 38.16% | ||||||||||||||||
| C000244528_0_AdditionalIndexMember_LOCMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 36.21% | ||||||||||||||||
| C000182866_LG_ClassMember_8YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Fidelity® Growth Strategies K6 Fund</span>" id="sjs-F536"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Growth Strategies K6 Fund</span> | ||||||||||||||||
| C000182866_ClassMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000182866_ClassMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,950 | ||||||||||||||||
| C000182866_ClassMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,244 | ||||||||||||||||
| C000182866_ClassMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,849 | ||||||||||||||||
| C000182866_ClassMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 17,344 | ||||||||||||||||
| C000182866_ClassMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 21,791 | ||||||||||||||||
| C000182866_ClassMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 17,505 | ||||||||||||||||
| C000182866_ClassMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 18,776 | 18,776 | 18,776 | 18,776 | $ 18,776 | 18,776 | 18,776 | ||||||||||
| C000182866_LG_1_AdditionalIndexMember_8YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell Midcap® Growth Index</span>" id="sjs-F563"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell Midcap® Growth Index</span> | ||||||||||||||||
| C000182866_1_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000182866_1_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,218 | ||||||||||||||||
| C000182866_1_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,814 | ||||||||||||||||
| C000182866_1_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,384 | ||||||||||||||||
| C000182866_1_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 18,828 | ||||||||||||||||
| C000182866_1_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 22,165 | ||||||||||||||||
| C000182866_1_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 17,340 | ||||||||||||||||
| C000182866_1_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 19,070 | 19,070 | 19,070 | 19,070 | $ 19,070 | 19,070 | 19,070 | ||||||||||
| C000182866_LG_2_AdditionalIndexMember_8YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Index</span>" id="sjs-F590"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span> | ||||||||||||||||
| C000182866_2_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000182866_2_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,090 | ||||||||||||||||
| C000182866_2_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,703 | ||||||||||||||||
| C000182866_2_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,516 | ||||||||||||||||
| C000182866_2_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 16,087 | ||||||||||||||||
| C000182866_2_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 20,324 | ||||||||||||||||
| C000182866_2_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 18,129 | ||||||||||||||||
| C000182866_2_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 20,414 | 20,414 | $ 20,414 | 20,414 | $ 20,414 | 20,414 | $ 20,414 | ||||||||||
| C000182866_NoLoadClassMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 45.82% | ||||||||||||||||
| C000182866_NoLoadClassMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 14.60% | ||||||||||||||||
| C000182866_NoLoadClassMember_2023-12-01_2024-11-30Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 14.33% | ||||||||||||||||
| C000182866_0_AdditionalIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 40.07% | ||||||||||||||||
| C000182866_0_AdditionalIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 13.18% | ||||||||||||||||
| C000182866_0_AdditionalIndexMember_LOCMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 13.95% | ||||||||||||||||
| C000064241_LG_ClassMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Class K</span>" id="sjs-H635"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Class K</span> | ||||||||||||||||
| C000064241_ClassMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000064241_ClassMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,500 | ||||||||||||||||
| C000064241_ClassMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,521 | ||||||||||||||||
| C000064241_ClassMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 12,816 | ||||||||||||||||
| C000064241_ClassMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,180 | ||||||||||||||||
| C000064241_ClassMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 16,203 | ||||||||||||||||
| C000064241_ClassMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 20,281 | ||||||||||||||||
| C000064241_ClassMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,440 | ||||||||||||||||
| C000064241_ClassMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 20,381 | ||||||||||||||||
| C000064241_ClassMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 21,769 | ||||||||||||||||
| C000064241_ClassMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 31,700 | 31,700 | $ 31,700 | 31,700 | 31,700 | 31,700 | $ 31,700 | ||||||||||
| C000064241_LG_1_AdditionalIndexMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell Midcap® Growth Index</span>" id="sjs-H671"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell Midcap® Growth Index</span> | ||||||||||||||||
| C000064241_1_AdditionalIndexMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000064241_1_AdditionalIndexMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,182 | ||||||||||||||||
| C000064241_1_AdditionalIndexMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,644 | ||||||||||||||||
| C000064241_1_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,308 | ||||||||||||||||
| C000064241_1_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,016 | ||||||||||||||||
| C000064241_1_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 17,065 | ||||||||||||||||
| C000064241_1_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 22,337 | ||||||||||||||||
| C000064241_1_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 26,296 | ||||||||||||||||
| C000064241_1_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 20,572 | ||||||||||||||||
| C000064241_1_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 22,624 | ||||||||||||||||
| C000064241_1_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 31,688 | 31,688 | 31,688 | 31,688 | 31,688 | 31,688 | $ 31,688 | ||||||||||
| C000064241_LG_2_AdditionalIndexMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Index</span>" id="sjs-H707"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span> | ||||||||||||||||
| C000064241_2_AdditionalIndexMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000064241_2_AdditionalIndexMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,258 | ||||||||||||||||
| C000064241_2_AdditionalIndexMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,111 | ||||||||||||||||
| C000064241_2_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,585 | ||||||||||||||||
| C000064241_2_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,336 | ||||||||||||||||
| C000064241_2_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 16,557 | ||||||||||||||||
| C000064241_2_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 19,706 | ||||||||||||||||
| C000064241_2_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 24,897 | ||||||||||||||||
| C000064241_2_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 22,207 | ||||||||||||||||
| C000064241_2_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,007 | ||||||||||||||||
| C000064241_2_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 33,631 | 33,631 | $ 33,631 | 33,631 | 33,631 | $ 33,631 | $ 33,631 | ||||||||||
| C000064241_NoLoadClassMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 45.62% | ||||||||||||||||
| C000064241_NoLoadClassMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 14.37% | ||||||||||||||||
| C000064241_NoLoadClassMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 12.23% | ||||||||||||||||
| C000064241_0_AdditionalIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 40.07% | ||||||||||||||||
| C000064241_0_AdditionalIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 13.18% | ||||||||||||||||
| C000064241_0_AdditionalIndexMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 12.22% | ||||||||||||||||
| C000019447_LG_ClassMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Fidelity® Growth Strategies Fund</span>" id="sjs-H761"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Growth Strategies Fund</span> | ||||||||||||||||
| C000019447_ClassMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000019447_ClassMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,486 | ||||||||||||||||
| C000019447_ClassMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,488 | ||||||||||||||||
| C000019447_ClassMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 12,756 | ||||||||||||||||
| C000019447_ClassMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,105 | ||||||||||||||||
| C000019447_ClassMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 16,088 | ||||||||||||||||
| C000019447_ClassMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 20,112 | ||||||||||||||||
| C000019447_ClassMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,202 | ||||||||||||||||
| C000019447_ClassMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 20,166 | ||||||||||||||||
| C000019447_ClassMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 21,513 | ||||||||||||||||
| C000019447_ClassMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 31,304 | 31,304 | $ 31,304 | 31,304 | 31,304 | $ 31,304 | $ 31,304 | ||||||||||
| C000019447_LG_1_AdditionalIndexMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell Midcap® Growth Index</span>" id="sjs-H797"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell Midcap® Growth Index</span> | ||||||||||||||||
| C000019447_1_AdditionalIndexMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000019447_1_AdditionalIndexMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,182 | ||||||||||||||||
| C000019447_1_AdditionalIndexMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,644 | ||||||||||||||||
| C000019447_1_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,308 | ||||||||||||||||
| C000019447_1_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,016 | ||||||||||||||||
| C000019447_1_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 17,065 | ||||||||||||||||
| C000019447_1_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 22,337 | ||||||||||||||||
| C000019447_1_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 26,296 | ||||||||||||||||
| C000019447_1_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 20,572 | ||||||||||||||||
| C000019447_1_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 22,624 | ||||||||||||||||
| C000019447_1_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 31,688 | 31,688 | 31,688 | 31,688 | 31,688 | 31,688 | $ 31,688 | ||||||||||
| C000019447_LG_2_AdditionalIndexMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Index</span>" id="sjs-H833"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span> | ||||||||||||||||
| C000019447_2_AdditionalIndexMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000019447_2_AdditionalIndexMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,258 | ||||||||||||||||
| C000019447_2_AdditionalIndexMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,111 | ||||||||||||||||
| C000019447_2_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 13,585 | ||||||||||||||||
| C000019447_2_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,336 | ||||||||||||||||
| C000019447_2_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 16,557 | ||||||||||||||||
| C000019447_2_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 19,706 | ||||||||||||||||
| C000019447_2_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 24,897 | ||||||||||||||||
| C000019447_2_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 22,207 | ||||||||||||||||
| C000019447_2_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,007 | ||||||||||||||||
| C000019447_2_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 33,631 | 33,631 | $ 33,631 | 33,631 | 33,631 | $ 33,631 | $ 33,631 | ||||||||||
| C000019447_NoLoadClassMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 45.51% | ||||||||||||||||
| C000019447_NoLoadClassMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 14.24% | ||||||||||||||||
| C000019447_NoLoadClassMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 12.09% | ||||||||||||||||
| C000019447_0_AdditionalIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 40.07% | ||||||||||||||||
| C000019447_0_AdditionalIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 13.18% | ||||||||||||||||
| C000019447_0_AdditionalIndexMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 12.22% | ||||||||||||||||
| C000019448_LG_ClassMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Fidelity® Growth Company Fund</span>" id="sjs-H887"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Fidelity® Growth Company Fund</span> | ||||||||||||||||
| C000019448_ClassMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000019448_ClassMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,890 | ||||||||||||||||
| C000019448_ClassMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,268 | ||||||||||||||||
| C000019448_ClassMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 15,476 | ||||||||||||||||
| C000019448_ClassMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 16,434 | ||||||||||||||||
| C000019448_ClassMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 20,058 | ||||||||||||||||
| C000019448_ClassMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 33,343 | ||||||||||||||||
| C000019448_ClassMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 43,934 | ||||||||||||||||
| C000019448_ClassMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 30,797 | ||||||||||||||||
| C000019448_ClassMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 39,032 | ||||||||||||||||
| C000019448_ClassMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 56,297 | 56,297 | $ 56,297 | 56,297 | 56,297 | $ 56,297 | $ 56,297 | ||||||||||
| C000019448_LG_1_AdditionalIndexMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Growth Index</span>" id="sjs-H923"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Growth Index</span> | ||||||||||||||||
| C000019448_1_AdditionalIndexMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,000 | ||||||||||||||||
| C000019448_1_AdditionalIndexMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 10,614 | ||||||||||||||||
| C000019448_1_AdditionalIndexMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 11,064 | ||||||||||||||||
| C000019448_1_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 14,412 | ||||||||||||||||
| C000019448_1_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 15,585 | ||||||||||||||||
| C000019448_1_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 18,746 | ||||||||||||||||
| C000019448_1_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,444 | ||||||||||||||||
| C000019448_1_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 32,923 | ||||||||||||||||
| C000019448_1_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 25,814 | ||||||||||||||||
| C000019448_1_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 32,155 | ||||||||||||||||
| C000019448_1_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | 44,425 | 44,425 | 44,425 | 44,425 | 44,425 | 44,425 | $ 44,425 | ||||||||||
| C000019448_LG_2_AdditionalIndexMember_11YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Line Graph and Table Measure Name | Russell 3000® Index</span>" id="sjs-H959"><span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;">Russell 3000® Index</span> | ||||||||||||||||
| C000019448_2_AdditionalIndexMember_AsOf_2014Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 10,000 | ||||||||||||||||
| C000019448_2_AdditionalIndexMember_AsOf_2015Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 10,258 | ||||||||||||||||
| C000019448_2_AdditionalIndexMember_AsOf_2016Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 11,111 | ||||||||||||||||
| C000019448_2_AdditionalIndexMember_AsOf_2017Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 13,585 | ||||||||||||||||
| C000019448_2_AdditionalIndexMember_AsOf_2018Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 14,336 | ||||||||||||||||
| C000019448_2_AdditionalIndexMember_AsOf_2019Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 16,557 | ||||||||||||||||
| C000019448_2_AdditionalIndexMember_AsOf_2020Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 19,706 | ||||||||||||||||
| C000019448_2_AdditionalIndexMember_AsOf_2021Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 24,897 | ||||||||||||||||
| C000019448_2_AdditionalIndexMember_AsOf_2022Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 22,207 | ||||||||||||||||
| C000019448_2_AdditionalIndexMember_AsOf_2023Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 25,007 | ||||||||||||||||
| C000019448_2_AdditionalIndexMember_AsOf_2024Member | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Account Value | $ 33,631 | $ 33,631 | $ 33,631 | $ 33,631 | $ 33,631 | $ 33,631 | $ 33,631 | ||||||||||
| C000019448_NoLoadClassMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 44.23% | ||||||||||||||||
| C000019448_NoLoadClassMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 22.92% | ||||||||||||||||
| C000019448_NoLoadClassMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 18.86% | ||||||||||||||||
| C000019448_0_AdditionalIndexMember_1YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 38.16% | ||||||||||||||||
| C000019448_0_AdditionalIndexMember_5YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 18.84% | ||||||||||||||||
| C000019448_0_AdditionalIndexMember_10YRMember | |||||||||||||||||
| Account Value [Line Items] | |||||||||||||||||
| Average Annual Return, Percent | 16.08% |
| Shareholder Report, Holdings (Details) | Nov. 30, 2024 |
| Fidelity Series Growth Company Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.10% |
| Fidelity Series Growth Company Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.60% |
| Fidelity Series Growth Company Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Series Growth Company Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Fidelity Series Growth Company Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Fidelity Series Growth Company Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.40% |
| Fidelity Series Growth Company Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Series Growth Company Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Series Growth Company Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity Series Growth Company Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity Series Growth Company Fund | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Series Growth Company Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.30% |
| Fidelity Series Growth Company Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.80% |
| Fidelity Series Growth Company Fund | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Series Growth Company Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Fidelity Series Growth Company Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Series Growth Company Fund | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.70% |
| Fidelity Series Growth Company Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Series Growth Company Fund | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Fidelity Series Growth Company Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Series Growth Company Fund | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Series Growth Company Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.30% |
| Fidelity Series Growth Company Fund | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Series Growth Company Fund | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Series Growth Company Fund | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Series Growth Company Fund | India | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Series Growth Company Fund | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Series Growth Company Fund | Belgium | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Series Growth Company Fund | Taiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Series Growth Company Fund | Denmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Series Growth Company Fund | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Series Growth Company Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.90% |
| Fidelity Series Growth Company Fund | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Series Growth Company Fund | AABondsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Series Growth Company Fund | AAPreferredSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Series Growth Company Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Growth Strategies Fund - Class Z | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Fidelity Advisor Growth Strategies Fund - Class Z | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Advisor Growth Strategies Fund - Class Z | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Fidelity Advisor Growth Strategies Fund - Class Z | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Growth Strategies Fund - Class Z | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Growth Strategies Fund - Class Z | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Growth Strategies Fund - Class Z | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Growth Strategies Fund - Class Z | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Growth Strategies Fund - Class Z | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity Advisor Growth Strategies Fund - Class Z | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Advisor Growth Strategies Fund - Class Z | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.10% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Growth Strategies Fund - Class Z | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.80% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Korea, Republic of | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Growth Strategies Fund - Class Z | Israel | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Growth Strategies Fund - Class Z | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Growth Strategies Fund - Class Z | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.70% |
| Fidelity Advisor Growth Strategies Fund - Class Z | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Growth Strategies Fund - Class I | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Fidelity Advisor Growth Strategies Fund - Class I | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Advisor Growth Strategies Fund - Class I | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Fidelity Advisor Growth Strategies Fund - Class I | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Growth Strategies Fund - Class I | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Growth Strategies Fund - Class I | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Growth Strategies Fund - Class I | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Growth Strategies Fund - Class I | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Growth Strategies Fund - Class I | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity Advisor Growth Strategies Fund - Class I | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Advisor Growth Strategies Fund - Class I | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.10% |
| Fidelity Advisor Growth Strategies Fund - Class I | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Advisor Growth Strategies Fund - Class I | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| Fidelity Advisor Growth Strategies Fund - Class I | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Advisor Growth Strategies Fund - Class I | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29% |
| Fidelity Advisor Growth Strategies Fund - Class I | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Growth Strategies Fund - Class I | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Advisor Growth Strategies Fund - Class I | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Growth Strategies Fund - Class I | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Fidelity Advisor Growth Strategies Fund - Class I | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Advisor Growth Strategies Fund - Class I | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Growth Strategies Fund - Class I | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.80% |
| Fidelity Advisor Growth Strategies Fund - Class I | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Growth Strategies Fund - Class I | Korea, Republic of | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Growth Strategies Fund - Class I | Israel | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Growth Strategies Fund - Class I | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Growth Strategies Fund - Class I | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.70% |
| Fidelity Advisor Growth Strategies Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity New Millennium Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.90% |
| Fidelity New Millennium Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| Fidelity New Millennium Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Fidelity New Millennium Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| Fidelity New Millennium Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity New Millennium Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity New Millennium Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity New Millennium Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity New Millennium Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity New Millennium Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity New Millennium Fund | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13.80% |
| Fidelity New Millennium Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.60% |
| Fidelity New Millennium Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.60% |
| Fidelity New Millennium Fund | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| Fidelity New Millennium Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 13% |
| Fidelity New Millennium Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Fidelity New Millennium Fund | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.30% |
| Fidelity New Millennium Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| Fidelity New Millennium Fund | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.90% |
| Fidelity New Millennium Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| Fidelity New Millennium Fund | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity New Millennium Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 94.10% |
| Fidelity New Millennium Fund | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity New Millennium Fund | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.30% |
| Fidelity New Millennium Fund | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity New Millennium Fund | Taiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity New Millennium Fund | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity New Millennium Fund | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity New Millennium Fund | Italy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity New Millennium Fund | Germany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity New Millennium Fund | Spain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity New Millennium Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98.90% |
| Fidelity New Millennium Fund | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity New Millennium Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Advisor Growth Strategies Fund - Class C | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Fidelity Advisor Growth Strategies Fund - Class C | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Advisor Growth Strategies Fund - Class C | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Fidelity Advisor Growth Strategies Fund - Class C | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Growth Strategies Fund - Class C | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Growth Strategies Fund - Class C | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Growth Strategies Fund - Class C | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Growth Strategies Fund - Class C | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Growth Strategies Fund - Class C | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity Advisor Growth Strategies Fund - Class C | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Advisor Growth Strategies Fund - Class C | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.10% |
| Fidelity Advisor Growth Strategies Fund - Class C | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Advisor Growth Strategies Fund - Class C | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| Fidelity Advisor Growth Strategies Fund - Class C | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Advisor Growth Strategies Fund - Class C | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29% |
| Fidelity Advisor Growth Strategies Fund - Class C | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Growth Strategies Fund - Class C | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Advisor Growth Strategies Fund - Class C | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Growth Strategies Fund - Class C | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Fidelity Advisor Growth Strategies Fund - Class C | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Advisor Growth Strategies Fund - Class C | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Growth Strategies Fund - Class C | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.80% |
| Fidelity Advisor Growth Strategies Fund - Class C | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Growth Strategies Fund - Class C | Korea, Republic of | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Growth Strategies Fund - Class C | Israel | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Growth Strategies Fund - Class C | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Growth Strategies Fund - Class C | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.70% |
| Fidelity Advisor Growth Strategies Fund - Class C | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Growth Strategies Fund - Class A | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Fidelity Advisor Growth Strategies Fund - Class A | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Advisor Growth Strategies Fund - Class A | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Fidelity Advisor Growth Strategies Fund - Class A | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Growth Strategies Fund - Class A | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Growth Strategies Fund - Class A | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Growth Strategies Fund - Class A | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Growth Strategies Fund - Class A | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Growth Strategies Fund - Class A | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity Advisor Growth Strategies Fund - Class A | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Advisor Growth Strategies Fund - Class A | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.10% |
| Fidelity Advisor Growth Strategies Fund - Class A | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Advisor Growth Strategies Fund - Class A | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| Fidelity Advisor Growth Strategies Fund - Class A | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Advisor Growth Strategies Fund - Class A | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29% |
| Fidelity Advisor Growth Strategies Fund - Class A | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Growth Strategies Fund - Class A | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Advisor Growth Strategies Fund - Class A | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Growth Strategies Fund - Class A | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Fidelity Advisor Growth Strategies Fund - Class A | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Advisor Growth Strategies Fund - Class A | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Growth Strategies Fund - Class A | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.80% |
| Fidelity Advisor Growth Strategies Fund - Class A | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Growth Strategies Fund - Class A | Korea, Republic of | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Growth Strategies Fund - Class A | Israel | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Growth Strategies Fund - Class A | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Growth Strategies Fund - Class A | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.70% |
| Fidelity Advisor Growth Strategies Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Company K6 Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.30% |
| Fidelity Growth Company K6 Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| Fidelity Growth Company K6 Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Fidelity Growth Company K6 Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| Fidelity Growth Company K6 Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| Fidelity Growth Company K6 Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Growth Company K6 Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity Growth Company K6 Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Growth Company K6 Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity Growth Company K6 Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity Growth Company K6 Fund | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| Fidelity Growth Company K6 Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 47.90% |
| Fidelity Growth Company K6 Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12% |
| Fidelity Growth Company K6 Fund | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Growth Company K6 Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Growth Company K6 Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Growth Company K6 Fund | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.60% |
| Fidelity Growth Company K6 Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity Growth Company K6 Fund | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.20% |
| Fidelity Growth Company K6 Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Company K6 Fund | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Growth Company K6 Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.30% |
| Fidelity Growth Company K6 Fund | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Growth Company K6 Fund | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Growth Company K6 Fund | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Growth Company K6 Fund | India | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Company K6 Fund | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Growth Company K6 Fund | Belgium | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Growth Company K6 Fund | Taiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Company K6 Fund | Denmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Growth Company K6 Fund | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Growth Company K6 Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98.10% |
| Fidelity Growth Company K6 Fund | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Fidelity Growth Company K6 Fund | AABondsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Growth Company K6 Fund | AAPreferredSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Growth Company K6 Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Advisor Growth Strategies Fund - Class M | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Fidelity Advisor Growth Strategies Fund - Class M | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Advisor Growth Strategies Fund - Class M | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Fidelity Advisor Growth Strategies Fund - Class M | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Growth Strategies Fund - Class M | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Advisor Growth Strategies Fund - Class M | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Advisor Growth Strategies Fund - Class M | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Growth Strategies Fund - Class M | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Advisor Growth Strategies Fund - Class M | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity Advisor Growth Strategies Fund - Class M | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Advisor Growth Strategies Fund - Class M | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.10% |
| Fidelity Advisor Growth Strategies Fund - Class M | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Advisor Growth Strategies Fund - Class M | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| Fidelity Advisor Growth Strategies Fund - Class M | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Advisor Growth Strategies Fund - Class M | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29% |
| Fidelity Advisor Growth Strategies Fund - Class M | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Advisor Growth Strategies Fund - Class M | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Advisor Growth Strategies Fund - Class M | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Advisor Growth Strategies Fund - Class M | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Fidelity Advisor Growth Strategies Fund - Class M | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Advisor Growth Strategies Fund - Class M | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Advisor Growth Strategies Fund - Class M | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.80% |
| Fidelity Advisor Growth Strategies Fund - Class M | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Advisor Growth Strategies Fund - Class M | Korea, Republic of | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Growth Strategies Fund - Class M | Israel | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Advisor Growth Strategies Fund - Class M | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Advisor Growth Strategies Fund - Class M | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.70% |
| Fidelity Advisor Growth Strategies Fund - Class M | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Company Fund - Class K | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.20% |
| Fidelity Growth Company Fund - Class K | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| Fidelity Growth Company Fund - Class K | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Growth Company Fund - Class K | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Growth Company Fund - Class K | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| Fidelity Growth Company Fund - Class K | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Fidelity Growth Company Fund - Class K | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Growth Company Fund - Class K | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Growth Company Fund - Class K | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity Growth Company Fund - Class K | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity Growth Company Fund - Class K | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Growth Company Fund - Class K | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.50% |
| Fidelity Growth Company Fund - Class K | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.70% |
| Fidelity Growth Company Fund - Class K | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Growth Company Fund - Class K | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| Fidelity Growth Company Fund - Class K | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Growth Company Fund - Class K | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.90% |
| Fidelity Growth Company Fund - Class K | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Growth Company Fund - Class K | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Fidelity Growth Company Fund - Class K | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Company Fund - Class K | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Growth Company Fund - Class K | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.40% |
| Fidelity Growth Company Fund - Class K | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Growth Company Fund - Class K | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Growth Company Fund - Class K | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Growth Company Fund - Class K | India | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Growth Company Fund - Class K | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Company Fund - Class K | Belgium | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Growth Company Fund - Class K | Taiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Growth Company Fund - Class K | Denmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Growth Company Fund - Class K | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Growth Company Fund - Class K | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.80% |
| Fidelity Growth Company Fund - Class K | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Growth Company Fund - Class K | AABondsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Growth Company Fund - Class K | AAPreferredSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Growth Company Fund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Equity Growth K6 Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| Fidelity Equity Growth K6 Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Equity Growth K6 Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Fidelity Equity Growth K6 Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Fidelity Equity Growth K6 Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Fidelity Equity Growth K6 Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| Fidelity Equity Growth K6 Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| Fidelity Equity Growth K6 Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Equity Growth K6 Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Equity Growth K6 Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Equity Growth K6 Fund | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| Fidelity Equity Growth K6 Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 39.40% |
| Fidelity Equity Growth K6 Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.40% |
| Fidelity Equity Growth K6 Fund | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Fidelity Equity Growth K6 Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| Fidelity Equity Growth K6 Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Equity Growth K6 Fund | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.50% |
| Fidelity Equity Growth K6 Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Equity Growth K6 Fund | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.20% |
| Fidelity Equity Growth K6 Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Equity Growth K6 Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 90.30% |
| Fidelity Equity Growth K6 Fund | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Equity Growth K6 Fund | Belgium | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Equity Growth K6 Fund | Taiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Fidelity Equity Growth K6 Fund | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Equity Growth K6 Fund | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Equity Growth K6 Fund | Israel | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Equity Growth K6 Fund | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Equity Growth K6 Fund | Germany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| Fidelity Equity Growth K6 Fund | Japan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Equity Growth K6 Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.30% |
| Fidelity Equity Growth K6 Fund | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Equity Growth K6 Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| Fidelity Growth Strategies K6 Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Fidelity Growth Strategies K6 Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| Fidelity Growth Strategies K6 Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Fidelity Growth Strategies K6 Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Growth Strategies K6 Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Growth Strategies K6 Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Growth Strategies K6 Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Growth Strategies K6 Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Growth Strategies K6 Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity Growth Strategies K6 Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Growth Strategies K6 Fund | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.20% |
| Fidelity Growth Strategies K6 Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.60% |
| Fidelity Growth Strategies K6 Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| Fidelity Growth Strategies K6 Fund | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Growth Strategies K6 Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29.10% |
| Fidelity Growth Strategies K6 Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Growth Strategies K6 Fund | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.30% |
| Fidelity Growth Strategies K6 Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Growth Strategies K6 Fund | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Fidelity Growth Strategies K6 Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Growth Strategies K6 Fund | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| Fidelity Growth Strategies K6 Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.70% |
| Fidelity Growth Strategies K6 Fund | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Fidelity Growth Strategies K6 Fund | Korea, Republic of | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Growth Strategies K6 Fund | Israel | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Growth Strategies K6 Fund | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Strategies K6 Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.80% |
| Fidelity Growth Strategies K6 Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Growth Strategies Fund - Class K | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Fidelity Growth Strategies Fund - Class K | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Growth Strategies Fund - Class K | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Fidelity Growth Strategies Fund - Class K | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Growth Strategies Fund - Class K | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Growth Strategies Fund - Class K | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Growth Strategies Fund - Class K | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Growth Strategies Fund - Class K | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Growth Strategies Fund - Class K | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity Growth Strategies Fund - Class K | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Growth Strategies Fund - Class K | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.10% |
| Fidelity Growth Strategies Fund - Class K | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Growth Strategies Fund - Class K | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| Fidelity Growth Strategies Fund - Class K | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Growth Strategies Fund - Class K | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29% |
| Fidelity Growth Strategies Fund - Class K | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Growth Strategies Fund - Class K | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Growth Strategies Fund - Class K | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Growth Strategies Fund - Class K | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Fidelity Growth Strategies Fund - Class K | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Growth Strategies Fund - Class K | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Growth Strategies Fund - Class K | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.80% |
| Fidelity Growth Strategies Fund - Class K | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Growth Strategies Fund - Class K | Korea, Republic of | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Growth Strategies Fund - Class K | Israel | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Growth Strategies Fund - Class K | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Strategies Fund - Class K | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.70% |
| Fidelity Growth Strategies Fund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Strategies Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.40% |
| Fidelity Growth Strategies Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Fidelity Growth Strategies Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| Fidelity Growth Strategies Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Growth Strategies Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Fidelity Growth Strategies Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Growth Strategies Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Growth Strategies Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.90% |
| Fidelity Growth Strategies Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Fidelity Growth Strategies Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Fidelity Growth Strategies Fund | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 15.10% |
| Fidelity Growth Strategies Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 23.80% |
| Fidelity Growth Strategies Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| Fidelity Growth Strategies Fund | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Fidelity Growth Strategies Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 29% |
| Fidelity Growth Strategies Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Fidelity Growth Strategies Fund | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 10.10% |
| Fidelity Growth Strategies Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Growth Strategies Fund | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Fidelity Growth Strategies Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Fidelity Growth Strategies Fund | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Growth Strategies Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.80% |
| Fidelity Growth Strategies Fund | Brazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Fidelity Growth Strategies Fund | Korea, Republic of | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Growth Strategies Fund | Israel | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| Fidelity Growth Strategies Fund | United Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Strategies Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 99.70% |
| Fidelity Growth Strategies Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Company Fund | TH0Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.20% |
| Fidelity Growth Company Fund | TH1Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| Fidelity Growth Company Fund | TH2Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Growth Company Fund | TH3Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7% |
| Fidelity Growth Company Fund | TH4Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| Fidelity Growth Company Fund | TH5Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Fidelity Growth Company Fund | TH6Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Growth Company Fund | TH7Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Fidelity Growth Company Fund | TH8Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Fidelity Growth Company Fund | TH9Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| Fidelity Growth Company Fund | MSFinancialsSectorMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Fidelity Growth Company Fund | Information Technology Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 48.50% |
| Fidelity Growth Company Fund | Healthcare Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.70% |
| Fidelity Growth Company Fund | Real Estate Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.10% |
| Fidelity Growth Company Fund | Industrial Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.80% |
| Fidelity Growth Company Fund | Materials Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Growth Company Fund | Consumer Discretionary Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 16.90% |
| Fidelity Growth Company Fund | Consumer Staples Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Fidelity Growth Company Fund | Communications Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.20% |
| Fidelity Growth Company Fund | Energy Sector | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Company Fund | Utilities Sector Member | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Growth Company Fund | United States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 96.40% |
| Fidelity Growth Company Fund | Netherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Growth Company Fund | Switzerland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Growth Company Fund | Canada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Growth Company Fund | India | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Fidelity Growth Company Fund | China | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.30% |
| Fidelity Growth Company Fund | Belgium | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Growth Company Fund | Taiwan | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Growth Company Fund | Denmark | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| Fidelity Growth Company Fund | OtherMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| Fidelity Growth Company Fund | AACommonStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 97.80% |
| Fidelity Growth Company Fund | AAPreferredStocksMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2% |
| Fidelity Growth Company Fund | AABondsMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Growth Company Fund | AAPreferredSecuritiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| Fidelity Growth Company Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
