Shareholder Report, Line Graph (Details) - USD ($) |
12 Months Ended | 24 Months Ended | 36 Months Ended | 48 Months Ended | 60 Months Ended | 72 Months Ended | 84 Months Ended | 96 Months Ended | 108 Months Ended | 120 Months Ended | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jul. 31, 2016 |
Jul. 31, 2026 |
Jul. 31, 2017 |
Jul. 31, 2018 |
Jul. 31, 2019 |
Jul. 31, 2020 |
Jul. 31, 2021 |
Jul. 31, 2022 |
Jul. 31, 2023 |
Jul. 31, 2024 |
Jul. 31, 2025 |
Jul. 31, 2026 |
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| C000131671 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $25,666 Fidelity<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> MSCI Communication Services Index ETF | |||||||||||
| Accumulated Value | $ 10,000 | $ 10,459 | $ 9,921 | $ 12,038 | $ 13,410 | $ 19,553 | $ 13,284 | $ 15,469 | $ 18,925 | $ 24,529 | $ 25,666 | |
| C000131662 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $34,977 Fidelity<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> MSCI Consumer Discretionary Index ETF | |||||||||||
| Accumulated Value | 10,000 | 11,442 | 13,886 | 15,018 | 18,812 | 26,892 | 23,156 | 25,482 | 28,310 | 32,768 | 34,977 | |
| C000131664 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $21,024 Fidelity<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> MSCI Consumer Staples Index ETF | |||||||||||
| Accumulated Value | 10,000 | 10,383 | 10,377 | 11,742 | 12,651 | 15,065 | 15,938 | 16,926 | 18,124 | 19,316 | 21,024 | |
| C000131665 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $25,194 Fidelity<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> MSCI Energy Index ETF | |||||||||||
| Accumulated Value | 10,000 | 9,908 | 11,941 | 9,623 | 5,842 | 8,693 | 14,404 | 16,723 | 18,437 | 17,849 | 25,194 | |
| C000131666 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $34,784 Fidelity<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> MSCI Financials Index ETF | |||||||||||
| Accumulated Value | 10,000 | 13,129 | 14,866 | 15,282 | 13,024 | 20,336 | 19,094 | 20,324 | 25,757 | 31,342 | 34,784 | |
| C000131667 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $25,656 Fidelity<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> MSCI Health Care Index ETF | |||||||||||
| Accumulated Value | 10,000 | 10,928 | 12,604 | 13,088 | 15,665 | 20,038 | 19,373 | 19,887 | 22,386 | 19,959 | 25,656 | |
| C000131668 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $36,860 Fidelity<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> MSCI Industrials Index ETF | |||||||||||
| Accumulated Value | 10,000 | 11,808 | 13,589 | 14,028 | 13,419 | 19,749 | 18,346 | 21,862 | 26,072 | 30,785 | 36,860 | |
| C000131669 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $84,407 Fidelity<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> MSCI Information Technology Index ETF | |||||||||||
| Accumulated Value | 10,000 | 12,884 | 16,482 | 19,109 | 26,177 | 36,798 | 33,335 | 41,289 | 52,269 | 63,904 | 84,407 | |
| C000131670 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $24,690 Fidelity<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> MSCI Materials Index ETF | |||||||||||
| Accumulated Value | 10,000 | 11,616 | 12,956 | 12,435 | 12,843 | 18,623 | 17,751 | 19,955 | 21,905 | 21,285 | 24,690 | |
| C000151119 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $16,861 Fidelity<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> MSCI Real Estate Index ETF | |||||||||||
| Accumulated Value | 10,000 | 9,848 | 10,294 | 11,651 | 11,037 | 14,965 | 14,328 | 12,916 | 14,284 | 14,656 | 16,861 | |
| C000131663 | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $23,068 Fidelity<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> MSCI Utilities Index ETF | |||||||||||
| Accumulated Value | 10,000 | 10,662 | 11,070 | 12,833 | 13,235 | 14,885 | 17,132 | 15,997 | 17,998 | 21,727 | 23,068 | |
| Fidelity Index: S&P 500® Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $40,742 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | |||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,489 | 14,566 | 16,308 | 22,251 | 21,219 | 23,980 | 29,292 | 34,076 | 40,742 | |
| Fidelity Index: S&P 500® Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $40,742 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | |||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,489 | 14,566 | 16,308 | 22,251 | 21,219 | 23,980 | 29,292 | 34,076 | 40,742 | |
| Fidelity Index: S&P 500® Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $40,742 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | |||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,489 | 14,566 | 16,308 | 22,251 | 21,219 | 23,980 | 29,292 | 34,076 | 40,742 | |
| Fidelity Index: S&P 500® Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $40,742 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | |||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,489 | 14,566 | 16,308 | 22,251 | 21,219 | 23,980 | 29,292 | 34,076 | 40,742 | |
| Fidelity Index: S&P 500® Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $40,742 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | |||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,489 | 14,566 | 16,308 | 22,251 | 21,219 | 23,980 | 29,292 | 34,076 | 40,742 | |
| Fidelity Index: S&P 500® Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $40,742 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | |||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,489 | 14,566 | 16,308 | 22,251 | 21,219 | 23,980 | 29,292 | 34,076 | 40,742 | |
| Fidelity Index: S&P 500® Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $40,742 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | |||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,489 | 14,566 | 16,308 | 22,251 | 21,219 | 23,980 | 29,292 | 34,076 | 40,742 | |
| Fidelity Index: S&P 500® Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $40,742 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | |||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,489 | 14,566 | 16,308 | 22,251 | 21,219 | 23,980 | 29,292 | 34,076 | 40,742 | |
| Fidelity Index: S&P 500® Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $40,742 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | |||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,489 | 14,566 | 16,308 | 22,251 | 21,219 | 23,980 | 29,292 | 34,076 | 40,742 | |
| Fidelity Index: S&P 500® Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $40,742 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | |||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,489 | 14,566 | 16,308 | 22,251 | 21,219 | 23,980 | 29,292 | 34,076 | 40,742 | |
| Fidelity Index: S&P 500® Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $40,742 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | |||||||||||
| Accumulated Value | 10,000 | 11,604 | 13,489 | 14,566 | 16,308 | 22,251 | 21,219 | 23,980 | 29,292 | 34,076 | 40,742 | |
| Fidelity Index: MSCI USA IMI Communication Services 25/50 Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $25,947 MSCI USA IMI Communication Services 25/50 Index | |||||||||||
| Accumulated Value | 10,000 | 10,483 | 9,943 | 12,081 | 13,475 | 19,665 | 13,371 | 15,585 | 19,087 | 24,762 | 25,947 | |
| Fidelity Index: Fidelity MSCI Consumer Discretionary Index ETF Capped Linked Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $35,044 Fidelity MSCI Consumer Discretionary Index ETF Capped Linked Index℠ | |||||||||||
| Accumulated Value | 10,000 | 11,454 | 13,915 | 15,056 | 18,851 | 26,826 | 23,124 | 25,471 | 28,323 | 32,814 | 35,044 | |
| Fidelity Index: Fidelity MSCI Consumer Staples Index ETF Capped Linked Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $21,248 Fidelity MSCI Consumer Staples Index ETF Capped Linked Index℠ | |||||||||||
| Accumulated Value | 10,000 | 10,393 | 10,403 | 11,781 | 12,717 | 15,160 | 16,053 | 17,064 | 18,289 | 19,508 | 21,248 | |
| Fidelity Index: Fidelity MSCI Energy Index ETF Capped Linked Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $25,410 Fidelity MSCI Energy Index ETF Capped Linked Index℠ | |||||||||||
| Accumulated Value | 10,000 | 9,921 | 11,970 | 9,649 | 5,857 | 8,725 | 14,476 | 16,823 | 18,562 | 17,987 | 25,410 | |
| Fidelity Index: Fidelity MSCI Financials Index ETF Capped Linked Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $35,108 Fidelity MSCI Financials Index ETF Capped Linked Index℠ | |||||||||||
| Accumulated Value | 10,000 | 13,152 | 14,904 | 15,332 | 13,084 | 20,445 | 19,211 | 20,465 | 25,959 | 31,618 | 35,108 | |
| Fidelity Index: Fidelity MSCI Health Care Index ETF Capped Linked Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $25,882 Fidelity MSCI Health Care Index ETF Capped Linked Index℠ | |||||||||||
| Accumulated Value | 10,000 | 10,939 | 12,631 | 13,128 | 15,727 | 20,135 | 19,481 | 20,012 | 22,546 | 20,118 | 25,882 | |
| Fidelity Index: Fidelity MSCI Industrials Index ETF Capped Linked Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $37,209 Fidelity MSCI Industrials Index ETF Capped Linked Index℠ | |||||||||||
| Accumulated Value | 10,000 | 11,819 | 13,617 | 14,066 | 13,470 | 19,843 | 18,447 | 22,003 | 26,270 | 31,048 | 37,209 | |
| Fidelity Index: Fidelity MSCI Information Technology Index ETF Capped Linked Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $85,174 Fidelity MSCI Information Technology Index ETF Capped Linked Index℠ | |||||||||||
| Accumulated Value | 10,000 | 12,900 | 16,523 | 19,172 | 26,291 | 36,991 | 33,534 | 41,574 | 52,617 | 64,386 | 85,174 | |
| Fidelity Index: Fidelity MSCI Materials Index ETF Capped Linked Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $24,839 Fidelity MSCI Materials Index ETF Capped Linked Index℠ | |||||||||||
| Accumulated Value | 10,000 | 11,626 | 12,962 | 12,458 | 12,879 | 18,652 | 17,795 | 20,022 | 21,999 | 21,395 | 24,839 | |
| Fidelity Index: Fidelity MSCI Real Estate Index ETF Capped Linked Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $17,018 Fidelity MSCI Real Estate Index ETF Capped Linked Index℠ | |||||||||||
| Accumulated Value | 10,000 | 9,852 | 10,307 | 11,669 | 11,085 | 15,063 | 14,416 | 13,009 | 14,413 | 14,781 | 17,018 | |
| Fidelity Index: Fidelity MSCI Utilities Index ETF Capped Linked Index | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | $23,308 Fidelity MSCI Utilities Index ETF Capped Linked Index℠ | |||||||||||
| Accumulated Value | $ 10,000 | $ 10,677 | $ 11,101 | $ 12,885 | $ 13,307 | $ 14,978 | $ 17,250 | $ 16,120 | $ 18,154 | $ 21,933 | $ 23,308 | |