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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Document Type dei_DocumentType Other
Document Period End Date dei_DocumentPeriodEndDate Nov. 30, 2013
Registrant Name dei_EntityRegistrantName Natixis Funds Trust II
Central Index Key dei_EntityCentralIndexKey 0000052136
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Feb. 18, 2014
Document Effective Date dei_DocumentEffectiveDate Feb. 18, 2014
Prospectus Date rr_ProspectusDate May 01, 2013
Supplement [Text Block] asgmanafutstg_SupplementTextBlock

 

ASG MANAGED FUTURES STRATEGY FUND

Supplement dated February 18, 2014 to the ASG Managed Futures Strategy Fund Summary Prospectus and Prospectus, each dated May 1, 2013, as each may be revised and supplemented from time to time.

 

Effective March 1, 2014, the Newedge Trend Index will replace the FTSE StableRisk Trend Composite Index as the ASG Managed Futures Strategy Fund's primary benchmark.

Effective March 1, 2014, the "Average Annual Total Returns" chart in the Fund's Summary Prospectus is amended and restated as follows:

 

Average Annual Total Returns (for the periods ended
December 31, 2012) 		  Past 1
Year 		     Life of Fund
(07/30/10)
ASG Managed Futures Strategy Fund        
Class A – Return Before Taxes   -16.20%   -1.97%
Return After Taxes on Distributions   -16.46%   -3.29%
Return After Taxes on Distributions & Sale of Fund Shares   -10.52%   -2.32%
Class C – Return Before Taxes   -12.62%   -0.31%
Class Y – Return Before Taxes   -10.90%   0.66%
Newedge Trend Index1     -3.52%   1.01%
FTSE StableRisk Trend Composite Index   -30.03%   -5.88%

 

1 Effective March 1, 2014, the Newedge Trend Index replaced the FTSE StableRisk Trend Composite Index as the Fund's primary benchmark because the FTSE StableRisk Trend Composite Index will be discontinued effective March 31, 2014.

 
­ | (ASG Managed Futures Strategy Fund)
  
Risk/Return: rr_RiskReturnAbstract  
Performance Table Heading rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2012)
Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged Effective March 1, 2014, the Newedge trend Index replaced the FTSE StableRisk trend Composite Index as the Fund's primary benchmark because the FTSE StableRisk trend Composite Index will be discontinued effective March 31, 2014.
­ | (ASG Managed Futures Strategy Fund) | Newedge Trend Index
  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (3.52%) [1]
Life of Fund rr_AverageAnnualReturnSinceInception 1.01% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 30, 2010
­ | (ASG Managed Futures Strategy Fund) | FTSE StableRisk Trend Composite Index
  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (30.03%)
Life of Fund rr_AverageAnnualReturnSinceInception (5.88%)
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 30, 2010
­ | (ASG Managed Futures Strategy Fund) | Class A
  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (16.20%)
Life of Fund rr_AverageAnnualReturnSinceInception (1.97%)
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 30, 2010
­ | (ASG Managed Futures Strategy Fund) | Class A | Return After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (16.46%)
Life of Fund rr_AverageAnnualReturnSinceInception (3.29%)
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 30, 2010
­ | (ASG Managed Futures Strategy Fund) | Class A | Return After Taxes on Distributions & Sale of Fund Shares
  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (10.52%)
Life of Fund rr_AverageAnnualReturnSinceInception (2.32%)
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 30, 2010
­ | (ASG Managed Futures Strategy Fund) | Class C
  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (12.62%)
Life of Fund rr_AverageAnnualReturnSinceInception (0.31%)
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 30, 2010
­ | (ASG Managed Futures Strategy Fund) | Class Y
  
Risk/Return: rr_RiskReturnAbstract  
Past 1 Year rr_AverageAnnualReturnYear01 (10.90%)
Life of Fund rr_AverageAnnualReturnSinceInception 0.66%
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 30, 2010
[1] Effective March 1, 2014, the Newedge Trend Index replaced the FTSE StableRisk Trend Composite Index as the Fund's primary benchmark because the FTSE StableRisk Trend Composite Index will be discontinued effective March 31, 2014.