Label	Element	Value
Compass EMP U.S. Discovery 500 Enhanced Volatility Weighted Index ETF
Risk/Return:	rr_RiskReturnAbstract
Supplement [Text Block]	ck0001547580_SupplementTextBlock	Compass EMP U.S. 500 Volatility Weighted Index ETF Compass EMP U.S. 500 Enhanced Volatility Weighted Index ETF Compass EMP U.S. EQ Income 100 Enhanced Volatility Weighted Index ETF Compass EMP U.S. Discovery 500 Enhanced Volatility Weighted Index ETF Compass EMP Developed 500 Enhanced Volatility Weighted Index ETF (the “Funds” and each a “Fund”) each a series of COMPASS EMP FUNDS TRUST Supplement dated July 10, 2015 to the Prospectus dated June 30, 2014, as amended on September 29, 2014 and supplemented May 1, 2015 The Prospectus is being supplemented to revise certain information contained therein with respect to the Funds.
Risk/Return [Heading]	rr_RiskReturnHeading	Compass EMP U.S. Discovery 500 Enhanced Volatility Weighted Index ETF
Strategy [Heading]	rr_StrategyHeading	1. The third paragraph under Principal Investment Strategies on page 6 of the Prospectus pertaining to the Compass EMP U.S. Discovery 500 Enhanced Volatility Weighted Index ETF is hereby replaced in its entirety with the following:
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Index seeks to limit risk during unfavorable (non-normal) market conditions by reducing its exposure to the market. Market conditions are measured by reference to the CEMP U.S. Small Cap 500 Volatility Weighted Index. During a period of market decline, defined as a decline of 11% or more from the all-time daily high value of the CEMP U.S. Small Cap 500 Volatility Weighted Index based on the month-end value, exposure to the market may be as low as 25% depending on the magnitude and duration of such decline. If the value of the CEMP U.S. Small Cap 500 Volatility Weighted Index declines 11% or more the Index will liquidate 75% of the stocks included in the Index. The Index will reinvest in stocks as follows: · The Index will return to being fully invested if the month-end value of the stocks in the CEMP U.S. Small Cap 500 Volatility Weighted Index returns to a level that is less than an 11% decline from its all-time daily high. · If the CEMP U.S. Small Cap 500 Volatility Weighted Index declines by 22% (or more) from its recent highest value, 25% of the Index will be reinvested back into the stocks of the CEMP U.S. Small Cap 500 Volatility Weighted Index at their current securities weighting. · If the CEMP U.S. Small Cap 500 Volatility Weighted Index declines by 33% (or more) from the recent highest value, another 25% of the Index will be reinvested back into the stocks ofthe CEMP U.S. Small Cap 500 Volatility Weighted Index at their current securities weighting. · If the CEMP U.S. Small Cap 500 Volatility Weighted Index declines by 44% (or more) from the recent highest value, the remaining 25% of the Index will be reinvested back into the stocks of the CEMP U.S. Small Cap 500 Volatility Weighted Index at their current securities weighting and the Index will then be 100% invested in stocks. The Index’s exposure to the market is dictated by a mathematical index construction algorithm. Under normal market conditions, the Fund invests at least 80% of its assets (defined as net assets plus any borrowing for investment purposes) in securities of U.S. issuers included in the Index as of its most recent reconstitution. * * * * * * * * * * This Supplement and the existing Statement of Additional Information dated June 30, 2014, as supplemented, provide relevant information for all shareholders and should be retained for future reference. Both the Prospectus and the Statement of Additional Information have been filed with the Securities and Exchange Commission, are incorporated herein by reference, and can be obtained without charge by calling the Funds at 1-888-944-4367. Please retain this Supplement for future reference.

Label

Element

Value

Compass EMP U.S. Discovery 500 Enhanced Volatility Weighted Index ETF

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

ck0001547580_SupplementTextBlock

Compass EMP U.S. 500 Volatility Weighted Index ETF

Compass EMP U.S. 500 Enhanced Volatility Weighted Index ETF

Compass EMP U.S. EQ Income 100 Enhanced Volatility Weighted Index ETF

Compass EMP U.S. Discovery 500 Enhanced Volatility Weighted Index ETF

Compass EMP Developed 500 Enhanced Volatility Weighted Index ETF

(the “Funds” and each a “Fund”)

each a series of COMPASS EMP FUNDS TRUST

Supplement dated July 10, 2015 to the

Prospectus dated June 30, 2014, as amended on September 29, 2014 and supplemented

May 1, 2015

The Prospectus is being supplemented to revise certain information contained therein with respect to the Funds.

Risk/Return [Heading]

rr_RiskReturnHeading

Compass EMP U.S. Discovery 500 Enhanced Volatility Weighted Index ETF

Strategy [Heading]

rr_StrategyHeading

1. The third paragraph under Principal Investment Strategies on page 6 of the Prospectus pertaining to the Compass EMP U.S. Discovery 500 Enhanced Volatility Weighted Index ETF is hereby replaced in its entirety with the following:

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Index seeks to limit risk during unfavorable (non-normal) market conditions by reducing its exposure to the market. Market conditions are measured by reference to the CEMP U.S. Small Cap 500 Volatility Weighted Index. During a period of market decline, defined as a decline of 11% or more from the all-time daily high value of the CEMP U.S. Small Cap 500 Volatility Weighted Index based on the month-end value, exposure to the market may be as low as 25% depending on the magnitude and duration of such decline.

If the value of the CEMP U.S. Small Cap 500 Volatility Weighted Index declines 11% or more the Index will liquidate 75% of the stocks included in the Index. The Index will reinvest in stocks as follows:

· The Index will return to being fully invested if the month-end value of the stocks in the CEMP U.S. Small Cap 500 Volatility Weighted Index returns to a level that is less than an 11% decline from its all-time daily high.

· If the CEMP U.S. Small Cap 500 Volatility Weighted Index declines by 22% (or more) from its recent highest value, 25% of the Index will be reinvested back into the stocks of the CEMP U.S. Small Cap 500 Volatility Weighted Index at their current securities weighting.

· If the CEMP U.S. Small Cap 500 Volatility Weighted Index declines by 33% (or more) from the recent highest value, another 25% of the Index will be reinvested back into the stocks ofthe CEMP U.S. Small Cap 500 Volatility Weighted Index at their current securities weighting.

· If the CEMP U.S. Small Cap 500 Volatility Weighted Index declines by 44% (or more) from the recent highest value, the remaining 25% of the Index will be reinvested back into the stocks of the CEMP U.S. Small Cap 500 Volatility Weighted Index at their current securities weighting and the Index will then be 100% invested in stocks.

The Index’s exposure to the market is dictated by a mathematical index construction algorithm. Under normal market conditions, the Fund invests at least 80% of its assets (defined as net assets plus any borrowing for investment purposes) in securities of U.S. issuers included in the Index as of its most recent reconstitution.

* * * * * * * * * *

This Supplement and the existing Statement of Additional Information dated June 30, 2014, as supplemented, provide relevant information for all shareholders and should be retained for future reference. Both the Prospectus and the Statement of Additional Information have been filed with the Securities and Exchange Commission, are incorporated herein by reference, and can be obtained without charge by calling the Funds at 1-888-944-4367.

Please retain this Supplement for future reference.