Annual Total Returns - Fidelity® Series Small Cap Opportunities Fund [BarChart] - 07.31 Fidelity Series Small Cap Opportunities Fund Series PRO-08 - Fidelity® Series Small Cap Opportunities Fund - Fidelity Series Small Cap Opportunities Fund-Default	Sep. 29, 2021
Bar Chart Table:
Annual Return 2011	(2.90%)
Annual Return 2012	11.89%
Annual Return 2013	35.51%
Annual Return 2014	2.27%
Annual Return 2015	(0.55%)
Annual Return 2016	15.18%
Annual Return 2017	12.02%
Annual Return 2018	(7.63%)
Annual Return 2019	29.91%
Annual Return 2020	17.04%

Annual Total Returns - Fidelity® Series Small Cap Opportunities Fund [BarChart] - 07.31 Fidelity Series Small Cap Opportunities Fund Series PRO-08 - Fidelity® Series Small Cap Opportunities Fund - Fidelity Series Small Cap Opportunities Fund-Default

Sep. 29, 2021

(2.90%)

Annual Return 2012

11.89%

35.51%

2.27%

(0.55%)

15.18%

12.02%

(7.63%)

29.91%

17.04%

If the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Subsection b
-Paragraph 2
-Subparagraph instructions
-Clause 3
-Exhibit a

+ Details

Name:	rr_AnnualReturn2011
Namespace Prefix:	rr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

+ References