v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
Fidelity Series Large Cap Stock Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Series Large Cap Stock Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
Fidelity Series Large Cap Stock Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
Fidelity Series Large Cap Stock Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
Fidelity Series Large Cap Stock Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Series Large Cap Stock Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
Fidelity Series Large Cap Stock Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Series Large Cap Stock Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
Fidelity Series Large Cap Stock Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Series Large Cap Stock Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Series Large Cap Stock Fund | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 17.00%
Fidelity Series Large Cap Stock Fund | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
Fidelity Series Large Cap Stock Fund | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
Fidelity Series Large Cap Stock Fund | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Series Large Cap Stock Fund | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 19.70%
Fidelity Series Large Cap Stock Fund | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Series Large Cap Stock Fund | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
Fidelity Series Large Cap Stock Fund | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Series Large Cap Stock Fund | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
Fidelity Series Large Cap Stock Fund | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
Fidelity Series Large Cap Stock Fund | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Series Large Cap Stock Fund | United States  
Holdings [Line Items]  
Percent of Net Asset Value 91.10%
Fidelity Series Large Cap Stock Fund | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
Fidelity Series Large Cap Stock Fund | Zambia  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Series Large Cap Stock Fund | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Series Large Cap Stock Fund | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Series Large Cap Stock Fund | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Series Large Cap Stock Fund | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Series Large Cap Stock Fund | France  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Series Large Cap Stock Fund | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Series Large Cap Stock Fund | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Series Large Cap Stock Fund | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
Fidelity Series Large Cap Stock Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Mega Cap Stock Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Mega Cap Stock Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Mega Cap Stock Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Mega Cap Stock Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Mega Cap Stock Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Mega Cap Stock Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Mega Cap Stock Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Mega Cap Stock Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Mega Cap Stock Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Mega Cap Stock Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Mega Cap Stock Fund | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
Fidelity Mega Cap Stock Fund | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 26.70%
Fidelity Mega Cap Stock Fund | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
Fidelity Mega Cap Stock Fund | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Mega Cap Stock Fund | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
Fidelity Mega Cap Stock Fund | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Mega Cap Stock Fund | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Mega Cap Stock Fund | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Mega Cap Stock Fund | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
Fidelity Mega Cap Stock Fund | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
Fidelity Mega Cap Stock Fund | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Mega Cap Stock Fund | United States  
Holdings [Line Items]  
Percent of Net Asset Value 93.10%
Fidelity Mega Cap Stock Fund | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Mega Cap Stock Fund | Zambia  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Mega Cap Stock Fund | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Mega Cap Stock Fund | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Mega Cap Stock Fund | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Mega Cap Stock Fund | France  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Mega Cap Stock Fund | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Mega Cap Stock Fund | Denmark  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Mega Cap Stock Fund | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 92.80%
Fidelity Mega Cap Stock Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor Mega Cap Stock Fund - Class Z | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Advisor Mega Cap Stock Fund - Class Z | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Advisor Mega Cap Stock Fund - Class Z | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Advisor Mega Cap Stock Fund - Class Z | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Advisor Mega Cap Stock Fund - Class Z | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class Z | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class Z | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Mega Cap Stock Fund - Class Z | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Mega Cap Stock Fund - Class Z | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor Mega Cap Stock Fund - Class Z | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor Mega Cap Stock Fund - Class Z | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 26.70%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Advisor Mega Cap Stock Fund - Class Z | United States  
Holdings [Line Items]  
Percent of Net Asset Value 93.10%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Zambia  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor Mega Cap Stock Fund - Class Z | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Advisor Mega Cap Stock Fund - Class Z | France  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor Mega Cap Stock Fund - Class Z | Denmark  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Advisor Mega Cap Stock Fund - Class Z | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 92.80%
Fidelity Advisor Mega Cap Stock Fund - Class Z | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor Mega Cap Stock Fund - Class M | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Advisor Mega Cap Stock Fund - Class M | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Advisor Mega Cap Stock Fund - Class M | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Advisor Mega Cap Stock Fund - Class M | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Advisor Mega Cap Stock Fund - Class M | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class M | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class M | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Mega Cap Stock Fund - Class M | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Mega Cap Stock Fund - Class M | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor Mega Cap Stock Fund - Class M | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor Mega Cap Stock Fund - Class M | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
Fidelity Advisor Mega Cap Stock Fund - Class M | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 26.70%
Fidelity Advisor Mega Cap Stock Fund - Class M | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
Fidelity Advisor Mega Cap Stock Fund - Class M | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor Mega Cap Stock Fund - Class M | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
Fidelity Advisor Mega Cap Stock Fund - Class M | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Advisor Mega Cap Stock Fund - Class M | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Advisor Mega Cap Stock Fund - Class M | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class M | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
Fidelity Advisor Mega Cap Stock Fund - Class M | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
Fidelity Advisor Mega Cap Stock Fund - Class M | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Advisor Mega Cap Stock Fund - Class M | United States  
Holdings [Line Items]  
Percent of Net Asset Value 93.10%
Fidelity Advisor Mega Cap Stock Fund - Class M | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Advisor Mega Cap Stock Fund - Class M | Zambia  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor Mega Cap Stock Fund - Class M | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Advisor Mega Cap Stock Fund - Class M | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor Mega Cap Stock Fund - Class M | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Advisor Mega Cap Stock Fund - Class M | France  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor Mega Cap Stock Fund - Class M | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor Mega Cap Stock Fund - Class M | Denmark  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Advisor Mega Cap Stock Fund - Class M | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 92.80%
Fidelity Advisor Mega Cap Stock Fund - Class M | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor Mega Cap Stock Fund - Class I | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Advisor Mega Cap Stock Fund - Class I | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Advisor Mega Cap Stock Fund - Class I | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Advisor Mega Cap Stock Fund - Class I | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Advisor Mega Cap Stock Fund - Class I | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class I | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class I | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Mega Cap Stock Fund - Class I | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Mega Cap Stock Fund - Class I | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor Mega Cap Stock Fund - Class I | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor Mega Cap Stock Fund - Class I | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
Fidelity Advisor Mega Cap Stock Fund - Class I | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 26.70%
Fidelity Advisor Mega Cap Stock Fund - Class I | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
Fidelity Advisor Mega Cap Stock Fund - Class I | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor Mega Cap Stock Fund - Class I | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
Fidelity Advisor Mega Cap Stock Fund - Class I | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Advisor Mega Cap Stock Fund - Class I | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Advisor Mega Cap Stock Fund - Class I | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class I | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
Fidelity Advisor Mega Cap Stock Fund - Class I | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
Fidelity Advisor Mega Cap Stock Fund - Class I | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Advisor Mega Cap Stock Fund - Class I | United States  
Holdings [Line Items]  
Percent of Net Asset Value 93.10%
Fidelity Advisor Mega Cap Stock Fund - Class I | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Advisor Mega Cap Stock Fund - Class I | Zambia  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor Mega Cap Stock Fund - Class I | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Advisor Mega Cap Stock Fund - Class I | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor Mega Cap Stock Fund - Class I | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Advisor Mega Cap Stock Fund - Class I | France  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor Mega Cap Stock Fund - Class I | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor Mega Cap Stock Fund - Class I | Denmark  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Advisor Mega Cap Stock Fund - Class I | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 92.80%
Fidelity Advisor Mega Cap Stock Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor Mega Cap Stock Fund - Class C | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Advisor Mega Cap Stock Fund - Class C | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Advisor Mega Cap Stock Fund - Class C | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Advisor Mega Cap Stock Fund - Class C | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Advisor Mega Cap Stock Fund - Class C | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class C | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class C | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Mega Cap Stock Fund - Class C | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Mega Cap Stock Fund - Class C | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor Mega Cap Stock Fund - Class C | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor Mega Cap Stock Fund - Class C | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
Fidelity Advisor Mega Cap Stock Fund - Class C | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 26.70%
Fidelity Advisor Mega Cap Stock Fund - Class C | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
Fidelity Advisor Mega Cap Stock Fund - Class C | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor Mega Cap Stock Fund - Class C | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
Fidelity Advisor Mega Cap Stock Fund - Class C | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Advisor Mega Cap Stock Fund - Class C | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Advisor Mega Cap Stock Fund - Class C | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class C | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
Fidelity Advisor Mega Cap Stock Fund - Class C | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
Fidelity Advisor Mega Cap Stock Fund - Class C | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Advisor Mega Cap Stock Fund - Class C | United States  
Holdings [Line Items]  
Percent of Net Asset Value 93.10%
Fidelity Advisor Mega Cap Stock Fund - Class C | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Advisor Mega Cap Stock Fund - Class C | Zambia  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor Mega Cap Stock Fund - Class C | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Advisor Mega Cap Stock Fund - Class C | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor Mega Cap Stock Fund - Class C | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Advisor Mega Cap Stock Fund - Class C | France  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor Mega Cap Stock Fund - Class C | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor Mega Cap Stock Fund - Class C | Denmark  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Advisor Mega Cap Stock Fund - Class C | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 92.80%
Fidelity Advisor Mega Cap Stock Fund - Class C | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor Mega Cap Stock Fund - Class A | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Advisor Mega Cap Stock Fund - Class A | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Advisor Mega Cap Stock Fund - Class A | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Advisor Mega Cap Stock Fund - Class A | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Advisor Mega Cap Stock Fund - Class A | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class A | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class A | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Mega Cap Stock Fund - Class A | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor Mega Cap Stock Fund - Class A | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Advisor Mega Cap Stock Fund - Class A | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
Fidelity Advisor Mega Cap Stock Fund - Class A | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
Fidelity Advisor Mega Cap Stock Fund - Class A | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 26.70%
Fidelity Advisor Mega Cap Stock Fund - Class A | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.40%
Fidelity Advisor Mega Cap Stock Fund - Class A | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor Mega Cap Stock Fund - Class A | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
Fidelity Advisor Mega Cap Stock Fund - Class A | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Advisor Mega Cap Stock Fund - Class A | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Advisor Mega Cap Stock Fund - Class A | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Advisor Mega Cap Stock Fund - Class A | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
Fidelity Advisor Mega Cap Stock Fund - Class A | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
Fidelity Advisor Mega Cap Stock Fund - Class A | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Advisor Mega Cap Stock Fund - Class A | United States  
Holdings [Line Items]  
Percent of Net Asset Value 93.10%
Fidelity Advisor Mega Cap Stock Fund - Class A | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Advisor Mega Cap Stock Fund - Class A | Zambia  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor Mega Cap Stock Fund - Class A | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Advisor Mega Cap Stock Fund - Class A | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor Mega Cap Stock Fund - Class A | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Advisor Mega Cap Stock Fund - Class A | France  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor Mega Cap Stock Fund - Class A | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor Mega Cap Stock Fund - Class A | Denmark  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Advisor Mega Cap Stock Fund - Class A | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 92.80%
Fidelity Advisor Mega Cap Stock Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Growth Discovery Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
Fidelity Growth Discovery Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
Fidelity Growth Discovery Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Fidelity Growth Discovery Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Growth Discovery Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Growth Discovery Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Growth Discovery Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Growth Discovery Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Growth Discovery Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Growth Discovery Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Growth Discovery Fund | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
Fidelity Growth Discovery Fund | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 31.30%
Fidelity Growth Discovery Fund | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
Fidelity Growth Discovery Fund | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Growth Discovery Fund | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Growth Discovery Fund | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Growth Discovery Fund | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.70%
Fidelity Growth Discovery Fund | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Growth Discovery Fund | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
Fidelity Growth Discovery Fund | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Growth Discovery Fund | United States  
Holdings [Line Items]  
Percent of Net Asset Value 88.90%
Fidelity Growth Discovery Fund | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Growth Discovery Fund | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Growth Discovery Fund | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Growth Discovery Fund | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Growth Discovery Fund | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Growth Discovery Fund | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Growth Discovery Fund | China  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Growth Discovery Fund | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Growth Discovery Fund | Israel  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Growth Discovery Fund | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 98.80%
Fidelity Growth Discovery Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Growth Discovery Fund | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Growth Discovery Fund | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Growth Discovery Fund | AABondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Growth Discovery Fund - Class K | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
Fidelity Growth Discovery Fund - Class K | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
Fidelity Growth Discovery Fund - Class K | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
Fidelity Growth Discovery Fund - Class K | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
Fidelity Growth Discovery Fund - Class K | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
Fidelity Growth Discovery Fund - Class K | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Growth Discovery Fund - Class K | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Growth Discovery Fund - Class K | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Growth Discovery Fund - Class K | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Growth Discovery Fund - Class K | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Growth Discovery Fund - Class K | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
Fidelity Growth Discovery Fund - Class K | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 31.30%
Fidelity Growth Discovery Fund - Class K | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
Fidelity Growth Discovery Fund - Class K | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Growth Discovery Fund - Class K | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
Fidelity Growth Discovery Fund - Class K | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Growth Discovery Fund - Class K | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.70%
Fidelity Growth Discovery Fund - Class K | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Growth Discovery Fund - Class K | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
Fidelity Growth Discovery Fund - Class K | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Growth Discovery Fund - Class K | United States  
Holdings [Line Items]  
Percent of Net Asset Value 88.90%
Fidelity Growth Discovery Fund - Class K | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Growth Discovery Fund - Class K | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Growth Discovery Fund - Class K | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Growth Discovery Fund - Class K | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Growth Discovery Fund - Class K | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Growth Discovery Fund - Class K | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Growth Discovery Fund - Class K | China  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Growth Discovery Fund - Class K | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Growth Discovery Fund - Class K | Israel  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Growth Discovery Fund - Class K | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 98.80%
Fidelity Growth Discovery Fund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Growth Discovery Fund - Class K | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Growth Discovery Fund - Class K | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Growth Discovery Fund - Class K | AABondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
Fidelity Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
Fidelity Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Fund | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
Fidelity Fund | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 27.10%
Fidelity Fund | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
Fidelity Fund | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Fund | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
Fidelity Fund | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Fund | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Fund | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Fund | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.00%
Fidelity Fund | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Fund | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Fund | United States  
Holdings [Line Items]  
Percent of Net Asset Value 90.80%
Fidelity Fund | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Fund | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Fund | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Fund | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Fund | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Fund | China  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Fund | Italy  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Fund | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Fund | India  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Fund | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 98.90%
Fidelity Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Fund | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Fund - Class K | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
Fidelity Fund - Class K | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
Fidelity Fund - Class K | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
Fidelity Fund - Class K | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
Fidelity Fund - Class K | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
Fidelity Fund - Class K | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Fund - Class K | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
Fidelity Fund - Class K | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Fund - Class K | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Fund - Class K | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Fund - Class K | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
Fidelity Fund - Class K | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 27.10%
Fidelity Fund - Class K | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
Fidelity Fund - Class K | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Fund - Class K | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.30%
Fidelity Fund - Class K | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Fund - Class K | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
Fidelity Fund - Class K | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Fund - Class K | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 18.00%
Fidelity Fund - Class K | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Fund - Class K | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Fund - Class K | United States  
Holdings [Line Items]  
Percent of Net Asset Value 90.80%
Fidelity Fund - Class K | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Fund - Class K | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
Fidelity Fund - Class K | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Fund - Class K | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Fund - Class K | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Fund - Class K | China  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Fund - Class K | Italy  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Fund - Class K | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Fund - Class K | India  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Fund - Class K | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 98.90%
Fidelity Fund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Fund - Class K | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%