v3.26.1
Shareholder Report, Holdings (Details)
Jun. 30, 2026
Fidelity Series Opportunistic Insights Fund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
Fidelity Series Opportunistic Insights Fund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
Fidelity Series Opportunistic Insights Fund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
Fidelity Series Opportunistic Insights Fund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
Fidelity Series Opportunistic Insights Fund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Series Opportunistic Insights Fund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Series Opportunistic Insights Fund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Series Opportunistic Insights Fund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Series Opportunistic Insights Fund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Series Opportunistic Insights Fund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
Fidelity Series Opportunistic Insights Fund | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
Fidelity Series Opportunistic Insights Fund | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 31.70%
Fidelity Series Opportunistic Insights Fund | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
Fidelity Series Opportunistic Insights Fund | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
Fidelity Series Opportunistic Insights Fund | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
Fidelity Series Opportunistic Insights Fund | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Series Opportunistic Insights Fund | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Series Opportunistic Insights Fund | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Series Opportunistic Insights Fund | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
Fidelity Series Opportunistic Insights Fund | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Series Opportunistic Insights Fund | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Series Opportunistic Insights Fund | United States  
Holdings [Line Items]  
Percent of Net Asset Value 90.80%
Fidelity Series Opportunistic Insights Fund | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Series Opportunistic Insights Fund | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Series Opportunistic Insights Fund | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Series Opportunistic Insights Fund | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Series Opportunistic Insights Fund | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Series Opportunistic Insights Fund | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Series Opportunistic Insights Fund | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Series Opportunistic Insights Fund | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Series Opportunistic Insights Fund | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Series Opportunistic Insights Fund | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 95.70%
Fidelity Series Opportunistic Insights Fund | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Series Opportunistic Insights Fund | AABondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Series Opportunistic Insights Fund | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Series Opportunistic Insights Fund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
Fidelity Contrafund K6 | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
Fidelity Contrafund K6 | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Contrafund K6 | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.60%
Fidelity Contrafund K6 | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
Fidelity Contrafund K6 | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
Fidelity Contrafund K6 | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Contrafund K6 | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Contrafund K6 | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
Fidelity Contrafund K6 | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Contrafund K6 | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Contrafund K6 | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
Fidelity Contrafund K6 | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
Fidelity Contrafund K6 | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
Fidelity Contrafund K6 | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Contrafund K6 | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Contrafund K6 | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Contrafund K6 | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
Fidelity Contrafund K6 | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Contrafund K6 | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
Fidelity Contrafund K6 | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
Fidelity Contrafund K6 | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Contrafund K6 | United States  
Holdings [Line Items]  
Percent of Net Asset Value 90.70%
Fidelity Contrafund K6 | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Contrafund K6 | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Contrafund K6 | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Contrafund K6 | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
Fidelity Contrafund K6 | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Contrafund K6 | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Contrafund K6 | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Contrafund K6 | China  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Contrafund K6 | Finland  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Contrafund K6 | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 98.00%
Fidelity Contrafund K6 | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Contrafund K6 | AABondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Contrafund K6 | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Contrafund K6 | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Contrafund | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Contrafund | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Contrafund | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
Fidelity Contrafund | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
Fidelity Contrafund | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Contrafund | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Contrafund | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Contrafund | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Contrafund | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Contrafund | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Contrafund | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
Fidelity Contrafund | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 30.70%
Fidelity Contrafund | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
Fidelity Contrafund | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Contrafund | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Contrafund | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Contrafund | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
Fidelity Contrafund | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Contrafund | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 22.20%
Fidelity Contrafund | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Contrafund | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Contrafund | United States  
Holdings [Line Items]  
Percent of Net Asset Value 91.00%
Fidelity Contrafund | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Contrafund | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Contrafund | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Contrafund | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Contrafund | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Contrafund | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Contrafund | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Contrafund | China  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Contrafund | Finland  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Contrafund | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 97.40%
Fidelity Contrafund | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Contrafund | AABondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Contrafund | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Contrafund | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Contrafund - Class K | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.40%
Fidelity Contrafund - Class K | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Contrafund - Class K | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
Fidelity Contrafund - Class K | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
Fidelity Contrafund - Class K | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
Fidelity Contrafund - Class K | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Contrafund - Class K | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
Fidelity Contrafund - Class K | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Contrafund - Class K | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Contrafund - Class K | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Contrafund - Class K | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
Fidelity Contrafund - Class K | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 30.70%
Fidelity Contrafund - Class K | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
Fidelity Contrafund - Class K | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
Fidelity Contrafund - Class K | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
Fidelity Contrafund - Class K | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
Fidelity Contrafund - Class K | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
Fidelity Contrafund - Class K | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
Fidelity Contrafund - Class K | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 22.20%
Fidelity Contrafund - Class K | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
Fidelity Contrafund - Class K | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Contrafund - Class K | United States  
Holdings [Line Items]  
Percent of Net Asset Value 91.00%
Fidelity Contrafund - Class K | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
Fidelity Contrafund - Class K | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Contrafund - Class K | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Contrafund - Class K | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Contrafund - Class K | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
Fidelity Contrafund - Class K | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
Fidelity Contrafund - Class K | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Contrafund - Class K | China  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Contrafund - Class K | Finland  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Contrafund - Class K | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 97.40%
Fidelity Contrafund - Class K | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Contrafund - Class K | AABondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Contrafund - Class K | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Contrafund - Class K | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
Fidelity Advisor New Insights Fund - Class Z | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
Fidelity Advisor New Insights Fund - Class Z | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Advisor New Insights Fund - Class Z | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor New Insights Fund - Class Z | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor New Insights Fund - Class Z | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Advisor New Insights Fund - Class Z | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Insights Fund - Class Z | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Advisor New Insights Fund - Class Z | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Advisor New Insights Fund - Class Z | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Insights Fund - Class Z | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor New Insights Fund - Class Z | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
Fidelity Advisor New Insights Fund - Class Z | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 30.40%
Fidelity Advisor New Insights Fund - Class Z | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor New Insights Fund - Class Z | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor New Insights Fund - Class Z | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
Fidelity Advisor New Insights Fund - Class Z | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Insights Fund - Class Z | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Advisor New Insights Fund - Class Z | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Advisor New Insights Fund - Class Z | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
Fidelity Advisor New Insights Fund - Class Z | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Advisor New Insights Fund - Class Z | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor New Insights Fund - Class Z | United States  
Holdings [Line Items]  
Percent of Net Asset Value 91.00%
Fidelity Advisor New Insights Fund - Class Z | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Advisor New Insights Fund - Class Z | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor New Insights Fund - Class Z | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Advisor New Insights Fund - Class Z | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor New Insights Fund - Class Z | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor New Insights Fund - Class Z | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Advisor New Insights Fund - Class Z | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Advisor New Insights Fund - Class Z | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Advisor New Insights Fund - Class Z | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Insights Fund - Class Z | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 95.10%
Fidelity Advisor New Insights Fund - Class Z | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Insights Fund - Class Z | AABondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Insights Fund - Class Z | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Insights Fund - Class Z | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Insights Fund - Class M | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
Fidelity Advisor New Insights Fund - Class M | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Advisor New Insights Fund - Class M | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor New Insights Fund - Class M | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor New Insights Fund - Class M | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Advisor New Insights Fund - Class M | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Insights Fund - Class M | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Advisor New Insights Fund - Class M | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Advisor New Insights Fund - Class M | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Insights Fund - Class M | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor New Insights Fund - Class M | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
Fidelity Advisor New Insights Fund - Class M | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 30.40%
Fidelity Advisor New Insights Fund - Class M | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor New Insights Fund - Class M | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor New Insights Fund - Class M | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
Fidelity Advisor New Insights Fund - Class M | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Insights Fund - Class M | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Advisor New Insights Fund - Class M | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Advisor New Insights Fund - Class M | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
Fidelity Advisor New Insights Fund - Class M | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Advisor New Insights Fund - Class M | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor New Insights Fund - Class M | United States  
Holdings [Line Items]  
Percent of Net Asset Value 91.00%
Fidelity Advisor New Insights Fund - Class M | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Advisor New Insights Fund - Class M | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor New Insights Fund - Class M | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Advisor New Insights Fund - Class M | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor New Insights Fund - Class M | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor New Insights Fund - Class M | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Advisor New Insights Fund - Class M | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Advisor New Insights Fund - Class M | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Advisor New Insights Fund - Class M | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Insights Fund - Class M | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 95.10%
Fidelity Advisor New Insights Fund - Class M | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Insights Fund - Class M | AABondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Insights Fund - Class M | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Insights Fund - Class M | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Insights Fund - Class I | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
Fidelity Advisor New Insights Fund - Class I | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Advisor New Insights Fund - Class I | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor New Insights Fund - Class I | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor New Insights Fund - Class I | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Advisor New Insights Fund - Class I | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Insights Fund - Class I | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Advisor New Insights Fund - Class I | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Advisor New Insights Fund - Class I | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Insights Fund - Class I | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor New Insights Fund - Class I | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
Fidelity Advisor New Insights Fund - Class I | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 30.40%
Fidelity Advisor New Insights Fund - Class I | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor New Insights Fund - Class I | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor New Insights Fund - Class I | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
Fidelity Advisor New Insights Fund - Class I | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Insights Fund - Class I | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Advisor New Insights Fund - Class I | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Advisor New Insights Fund - Class I | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
Fidelity Advisor New Insights Fund - Class I | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Advisor New Insights Fund - Class I | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor New Insights Fund - Class I | United States  
Holdings [Line Items]  
Percent of Net Asset Value 91.00%
Fidelity Advisor New Insights Fund - Class I | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Advisor New Insights Fund - Class I | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor New Insights Fund - Class I | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Advisor New Insights Fund - Class I | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor New Insights Fund - Class I | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor New Insights Fund - Class I | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Advisor New Insights Fund - Class I | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Advisor New Insights Fund - Class I | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Advisor New Insights Fund - Class I | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Insights Fund - Class I | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 95.10%
Fidelity Advisor New Insights Fund - Class I | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Insights Fund - Class I | AABondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Insights Fund - Class I | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Insights Fund - Class I | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Insights Fund - Class C | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
Fidelity Advisor New Insights Fund - Class C | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Advisor New Insights Fund - Class C | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor New Insights Fund - Class C | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor New Insights Fund - Class C | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Advisor New Insights Fund - Class C | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Insights Fund - Class C | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Advisor New Insights Fund - Class C | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Advisor New Insights Fund - Class C | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Insights Fund - Class C | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor New Insights Fund - Class C | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
Fidelity Advisor New Insights Fund - Class C | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 30.40%
Fidelity Advisor New Insights Fund - Class C | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor New Insights Fund - Class C | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor New Insights Fund - Class C | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
Fidelity Advisor New Insights Fund - Class C | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Insights Fund - Class C | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Advisor New Insights Fund - Class C | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Advisor New Insights Fund - Class C | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
Fidelity Advisor New Insights Fund - Class C | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Advisor New Insights Fund - Class C | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor New Insights Fund - Class C | United States  
Holdings [Line Items]  
Percent of Net Asset Value 91.00%
Fidelity Advisor New Insights Fund - Class C | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Advisor New Insights Fund - Class C | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor New Insights Fund - Class C | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Advisor New Insights Fund - Class C | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor New Insights Fund - Class C | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor New Insights Fund - Class C | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Advisor New Insights Fund - Class C | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Advisor New Insights Fund - Class C | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Advisor New Insights Fund - Class C | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Insights Fund - Class C | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 95.10%
Fidelity Advisor New Insights Fund - Class C | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Insights Fund - Class C | AABondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Insights Fund - Class C | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Insights Fund - Class C | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
Fidelity Advisor New Insights Fund - Class A | TH0Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.20%
Fidelity Advisor New Insights Fund - Class A | TH1Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
Fidelity Advisor New Insights Fund - Class A | TH2Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor New Insights Fund - Class A | TH3Member  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
Fidelity Advisor New Insights Fund - Class A | TH4Member  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
Fidelity Advisor New Insights Fund - Class A | TH5Member  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
Fidelity Advisor New Insights Fund - Class A | TH6Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Advisor New Insights Fund - Class A | TH7Member  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
Fidelity Advisor New Insights Fund - Class A | TH8Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Insights Fund - Class A | TH9Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor New Insights Fund - Class A | MSFinancialsSectorMember  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
Fidelity Advisor New Insights Fund - Class A | Information Technology Member  
Holdings [Line Items]  
Percent of Net Asset Value 30.40%
Fidelity Advisor New Insights Fund - Class A | Healthcare Sector  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
Fidelity Advisor New Insights Fund - Class A | Real Estate Sector  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor New Insights Fund - Class A | Industrial Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
Fidelity Advisor New Insights Fund - Class A | Materials Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
Fidelity Advisor New Insights Fund - Class A | Consumer Discretionary Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
Fidelity Advisor New Insights Fund - Class A | Consumer Staples Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
Fidelity Advisor New Insights Fund - Class A | Communications Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
Fidelity Advisor New Insights Fund - Class A | Energy Sector  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
Fidelity Advisor New Insights Fund - Class A | Utilities Sector Member  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor New Insights Fund - Class A | United States  
Holdings [Line Items]  
Percent of Net Asset Value 91.00%
Fidelity Advisor New Insights Fund - Class A | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
Fidelity Advisor New Insights Fund - Class A | Taiwan  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
Fidelity Advisor New Insights Fund - Class A | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
Fidelity Advisor New Insights Fund - Class A | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
Fidelity Advisor New Insights Fund - Class A | Korea, Republic of  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
Fidelity Advisor New Insights Fund - Class A | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Advisor New Insights Fund - Class A | Belgium  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
Fidelity Advisor New Insights Fund - Class A | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
Fidelity Advisor New Insights Fund - Class A | OtherMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Insights Fund - Class A | AACommonStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 95.10%
Fidelity Advisor New Insights Fund - Class A | AAPreferredStocksMember  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
Fidelity Advisor New Insights Fund - Class A | AABondsMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Insights Fund - Class A | AAPreferredSecuritiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
Fidelity Advisor New Insights Fund - Class A | AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%