Label

Element

Value

Risk/Return:

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Registrant Name

dei_EntityRegistrantName

SPDR SERIES TRUST

Prospectus Date

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Oct. 31, 2019

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio S&P 1500 Composite Stock Market ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S & P 600 Small Cap Value ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Global Dow ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Dow Jones REIT ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P Bank ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P Capital Markets ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P Insurance ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) NYSE Technology ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Dividend ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio S&P 500 ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio S&P 500 Growth ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio S&P 500 Value ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio S&P 400 Mid Cap ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S & P 400 Mid Cap Growth ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S & P 400 Mid Cap Value ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S & P 600 Small Cap ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S & P 600 Small Cap Growth ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Biotech ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Homebuilders ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Semiconductor ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Aerospace & Defense ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Oil & Gas Exploration & Production ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Pharmaceuticals ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Retail ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Telecom ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Transportation ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P Regional Banking(SM) ETF

Risk/Return:

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Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Software & Services ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Health Care Equipment ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Health Care Services ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Metals & Mining ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) S&P(R) Oil & Gas Equipment & Services ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Bloomberg Barclays 1-3 Month T-Bill ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Nuveen Bloomberg Barclays Short Term Municipal Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio Intermediate Term Treasury ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio Long Term Treasury ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio TIPS ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Nuveen Bloomberg Barclays Municipal Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio Aggregate Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Bloomberg Barclays International Treasury Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) FTSE International Government Inflation-Protected Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio Short Term Treasury ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio Short Term Corporate Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Bloomberg Barclays High Yield Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Bloomberg Barclays Emerging Markets Local Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio Mortgage Backed Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio Intermediate Term Corporate Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio Long Term Corporate Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Bloomberg Barclays Convertible Securities ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Bloomberg Barclays Short Term International Treasury Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Wells Fargo Preferred Stock ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Nuveen Bloomberg Barclays High Yield Municipal Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Bloomberg Barclays International Corporate Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR Portfolio Corporate Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P 1500 Value Tilt ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

rr_SupplementToProspectusTextBlock

SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P 1500 Momentum Tilt ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR Bloomberg Barclays Investment Grade Floating Rate ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR Bloomberg Barclays Short Term High Yield Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR Portfolio High Yield Bond ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR SSGA US Large Cap Low Volatility Index ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR SSGA US Small Cap Low Volatility Index ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR Bloomberg Barclays 1-10 Year TIPS ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio S&P 600 Small Cap ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P 500(R) Buyback ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR MSCI USA StrategicFactors ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR(R) Portfolio S&P 500 High Dividend ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR FactSet Innovative Technology ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P 500 Fossil Fuel Reserves Free ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR Russell 1000 Yield Focus ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR Russell 1000 Momentum Focus ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR Russell 1000 Low Volatility Focus ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR Dorsey Wright Fixed Income Allocation ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR SSGA Gender Diversity Index ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P Technology Hardware ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P Internet ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P Kensho Intelligent Structures ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P Kensho Smart Mobility ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P Kensho Future Security ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P Kensho Clean Power ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P Kensho Final Frontiers ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. 

SPDR S&P Kensho New Economies Composite ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement to Prospectus [Text Block]

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SPDR^® Series Trust 

Supplement dated April 3, 2020 to the currently effective Prospectuses and  

Summary Prospectuses, as each may be supplemented from time to time 

1. Effective immediately, the “Market Risk” discussion included in each “PRINCIPAL RISKS OF INVESTING IN THE FUND” section in the Prospectuses and Summary Prospectuses is deleted and replaced with the following:  

Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, acts of terrorism, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments.