State Street SPDR Portfolio SP 1500 Composite Stock Market ETF Average Annual Total Returns |
12 Months Ended | 28 Months Ended | 60 Months Ended | 65 Months Ended | 86 Months Ended | 96 Months Ended | 118 Months Ended | 120 Months Ended | |||
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| S&P Composite 1500 Index/SSGA Total Stock Market Index/Russell 3000 Index (reflects no deduction for fees, expenses or taxes)[Member] | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Average Annual Return, Percent | [1] | 17.02% | 13.96% | 14.47% | |||||||
| S&P 500 Index (reflects no deduction for fees, expenses or taxes)[Member] | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Average Annual Return, Percent | 17.88% | 21.76% | 14.42% | 16.50% | 15.33% | 14.27% | 15.31% | 15.77% | 14.82% | ||
| State Street SPDR Portfolio SP 1500 Composite Stock Market ETF | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Average Annual Return, Percent | 16.94% | 13.94% | 14.45% | ||||||||
| State Street SPDR Portfolio SP 1500 Composite Stock Market ETF | After Taxes on Distributions | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Average Annual Return, Percent | 16.59% | 13.54% | 13.98% | ||||||||
| State Street SPDR Portfolio SP 1500 Composite Stock Market ETF | After Taxes on Distributions and Sales | |||||||||||
| Prospectus [Line Items] | |||||||||||
| Average Annual Return, Percent | 10.22% | 11.10% | 12.02% | ||||||||
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