497

Natixis Funds Trust II

Exhibit Index

Exhibit	Exhibit Description
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

XML

Label	Element	Value
Prospectus:	rr_ProspectusTable
Document Type	dei_DocumentType	Other
Document Period End Date	dei_DocumentPeriodEndDate	Jun. 30, 2016
Registrant Name	dei_EntityRegistrantName	Natixis Funds Trust II
Central Index Key	dei_EntityCentralIndexKey	0000052136
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Jun. 30, 2016
Document Effective Date	dei_DocumentEffectiveDate	Jun. 30, 2016
Prospectus Date	rr_ProspectusDate	Jun. 30, 2016

XML

Jun. 30, 2016

NATIXIS FUNDS

Supplement dated June 30, 2016 to the Natixis Funds Summary Prospectuses and Statutory Prospectuses, dated April 1, 2016 and May 1, 2016 as may be revised or supplemented from time to time, for the following funds.

LOOMIS SAYLES DIVIDEND INCOME FUND

Effective July 1, 2016, Loomis, Sayles & Company, L.P. has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses (exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses) to 1.10%, 1.85% and 0.85% of the Fund's average daily net assets for Class A, Class C and Class Y shares, respectively.

This undertaking is in effect through March 31, 2018.

Accordingly, the Annual Fund Operating Expenses table and the Example table within the section "Fund Fees & Expenses" are amended and restated as follows with respect to the Fund:

Annual Fund Operating Expenses

(expenses that you pay each year as a percentage of the value of your investment)

	Class A			Class C			Class Y
Management fees		0.60	%		0.60	%		0.60	%
Distribution and/or service (12b-1) fees		0.25	%		1.00	%		0.00	%
Other expenses		0.75	%		0.75	%		0.72	%
Total annual fund operating expenses		1.60	%		2.35	%		1.32	%
Fee waiver and/or expense reimbursement1		0.50	%		0.50	%		0.47	%
Total annual fund operating expenses after fee waiver and/or expense reimbursement		1.10	%		1.85	%		0.85	%

1 Loomis, Sayles & Company, L.P. ("Loomis Sayles" or the "Adviser") has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.10%, 1.85% and 0.85% of the Fund's average daily net assets for Class A, C and Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through March 31, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Adviser will be permitted to recover, on a class by class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitations for Class A, C and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fees or expenses were waived/reimbursed.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same, except that the example is based on Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the first 21 months and on the Total Annual Fund Operating Expenses for the remaining periods. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

If shares are redeemed:
	1 year		3 years		5 years		10 years
Class A	$	681	$	969	$	1,316	$	2,295
Class C	$	288	$	648	$	1,174	$	2,618
Class Y	$	87	$	335	$	643	$	1,517

If shares are not redeemed:
	1 year		3 years		5 years		10 years
Class C	$	188	$	648	$	1,174	$	2,618

VAUGHAN NELSON SELECT FUND

Effective July 1, 2016, NGAM Advisors, L.P. has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses (exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses) to 1.30%, 2.05% and 1.05% of the Fund's average daily net assets for Class A, Class C and Class Y shares, respectively.

This undertaking is in effect through March 31, 2018.

Accordingly, the Annual Fund Operating Expenses table and the Example table within the section "Fund Fees & Expenses" are amended and restated as follows with respect to the Fund:

Annual Fund Operating Expenses

(expenses that you pay each year as a percentage of the value of your investment)

	Class A			Class C			Class Y
Management fees		0.85	%		0.85	%		0.85	%
Distribution and/or service (12b-1) fees		0.25	%		1.00	%		0.00	%
Other expenses		0.30	%		0.30	%		0.30	%
Acquired fund fees and expenses1,2		0.14	%		0.14	%		0.14	%
Total annual fund operating expenses		1.54	%		2.29	%		1.29	%
Fee waiver and/or expense reimbursement		0.10	%		0.10	%		0.10	%
Total annual fund operating expenses after the fee waiver and/or expense reimbursement		1.44	%		2.19	%		1.19	%

1

The expense information shown in the table above may differ from the expense information disclosed in the Fund's financial highlights table because the financial highlights table reflects the operating expenses of the Fund and does not include acquired fund fees and expenses.

2

NGAM Advisors, L.P. ("NGAM Advisors") has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.30%, 2.05% and 1.05% of the Fund's average daily net assets for Class A, C and Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, dividend expenses on securities sold short, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through March 31, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Fund's investment adviser will be permitted to recover, on a class by class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitations for Class A, C and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fees or expenses were waived/reimbursed.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same, except that the example is based on Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the first 21 months and on the Total Annual Fund Operating Expenses for the remaining periods. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

If shares are redeemed:
	1 year		3 years		5 years		10 years
Class A	$	713	$	1,017	$	1,350	$	2,290
Class C	$	322	$	698	$	1,209	$	2,612
Class Y	$	121	$	391	$	691	$	1,541

If shares are not redeemed:
	1 year		3 years		5 years		10 years
Class C	$	222	$	698	$	1,209	$	2,612

SEEYOND^SM MULTI-ASSET ALLOCATION FUND

Effective July 1, 2016, Natixis Asset Management U.S., LLC has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses (exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses) to 1.25%, 2.00%, and 1.00% of the Fund's average daily net assets for Class A, Class C and Class Y shares, respectively.

This undertaking is in effect through April 30, 2018.

Additionally, effective July 1, 2016, Natixis Asset Management U.S., LLC has reduced the advisory fee for the Fund.

Accordingly, the Annual Fund Operating Expenses table and the Example table within the section "Fund Fees & Expenses" are amended and restated as follows with respect to the Fund:

Annual Fund Operating Expenses¹

(expenses that you pay each year as a percentage of the value of your investment)

	Class A			Class C			Class Y
Management fees		0.80	%		0.80	%		0.80	%
Distribution and/or service (12b-1) fees		0.25	%		1.00	%		0.00	%
Other expenses		0.50	%		0.48	%		0.44	%
Acquired fund fees and expenses2		0.05	%		0.05	%		0.05	%
Total annual fund operating expenses		1.60	%		2.33	%		1.29	%
Fee waiver and/or expense reimbursement3		0.25	%		0.23	%		0.20	%
Total annual fund operating expenses after fee waiver and/or expense reimbursement		1.35	%		2.10	%		1.09	%

1	The Fund's operating expenses have been restated to reflect a reduction in management fees, effective as of July 1, 2016, as if such reduction had been in effect during the fiscal year ended December 31, 2015. The information has been restated to better reflect anticipated expenses of the Fund.
2	The expense information shown in the table differs from the expense information disclosed in the Fund's financial highlights table because the financial highlights table reflects the operating expenses of the Fund and does not include acquired fund fees and expenses.
3	Natixis Asset Management U.S., LLC ("Natixis AM US" or the "Adviser") has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.25%, 2.00% and 1.00% of the Fund's average daily net assets for Class A, Class C and Class Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through April 30, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Adviser will be permitted to recover, on a class-by-class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitations for Class A, C and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fee/expense was waived/reimbursed.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same, except that the example is based on the Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the first 22 months and on the Total Annual Fund Operating Expenses for the remaining periods. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

If shares are redeemed:
	1 year		3 years		5 years		10 years
Class A	$	705	$	1,008	$	1,354	$	2,329
Class C	$	313	$	686	$	1,206	$	2,633
Class Y	$	111	$	372	$	672	$	1,524

If shares are not redeemed:
	1 year		3 years		5 years		10 years
Class C	$	213	$	686	$	1,206	$	2,633

XML

Label

Element

Value

Prospectus:

rr_ProspectusTable

Supplement Text Block

natfdstrtii-20160630_SupplementTextBlock

NATIXIS FUNDS

Supplement dated June 30, 2016 to the Natixis Funds Summary Prospectuses and Statutory Prospectuses, dated April 1, 2016 and May 1, 2016 as may be revised or supplemented from time to time, for the following funds.

LOOMIS SAYLES DIVIDEND INCOME FUND

Effective July 1, 2016, Loomis, Sayles & Company, L.P. has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses (exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses) to 1.10%, 1.85% and 0.85% of the Fund's average daily net assets for Class A, Class C and Class Y shares, respectively.

This undertaking is in effect through March 31, 2018.

Accordingly, the Annual Fund Operating Expenses table and the Example table within the section "Fund Fees & Expenses" are amended and restated as follows with respect to the Fund:

Annual Fund Operating Expenses

(expenses that you pay each year as a percentage of the value of your investment)

	Class A			Class C			Class Y
Management fees		0.60	%		0.60	%		0.60	%
Distribution and/or service (12b-1) fees		0.25	%		1.00	%		0.00	%
Other expenses		0.75	%		0.75	%		0.72	%
Total annual fund operating expenses		1.60	%		2.35	%		1.32	%
Fee waiver and/or expense reimbursement1		0.50	%		0.50	%		0.47	%
Total annual fund operating expenses after fee waiver and/or expense reimbursement		1.10	%		1.85	%		0.85	%

1 Loomis, Sayles & Company, L.P. ("Loomis Sayles" or the "Adviser") has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.10%, 1.85% and 0.85% of the Fund's average daily net assets for Class A, C and Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through March 31, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Adviser will be permitted to recover, on a class by class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitations for Class A, C and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fees or expenses were waived/reimbursed.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same, except that the example is based on Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the first 21 months and on the Total Annual Fund Operating Expenses for the remaining periods. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

If shares are redeemed:
	1 year		3 years		5 years		10 years
Class A	$	681	$	969	$	1,316	$	2,295
Class C	$	288	$	648	$	1,174	$	2,618
Class Y	$	87	$	335	$	643	$	1,517

If shares are not redeemed:
	1 year		3 years		5 years		10 years
Class C	$	188	$	648	$	1,174	$	2,618

VAUGHAN NELSON SELECT FUND

Effective July 1, 2016, NGAM Advisors, L.P. has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses (exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses) to 1.30%, 2.05% and 1.05% of the Fund's average daily net assets for Class A, Class C and Class Y shares, respectively.

This undertaking is in effect through March 31, 2018.

Accordingly, the Annual Fund Operating Expenses table and the Example table within the section "Fund Fees & Expenses" are amended and restated as follows with respect to the Fund:

Annual Fund Operating Expenses

(expenses that you pay each year as a percentage of the value of your investment)

	Class A			Class C			Class Y
Management fees		0.85	%		0.85	%		0.85	%
Distribution and/or service (12b-1) fees		0.25	%		1.00	%		0.00	%
Other expenses		0.30	%		0.30	%		0.30	%
Acquired fund fees and expenses1,2		0.14	%		0.14	%		0.14	%
Total annual fund operating expenses		1.54	%		2.29	%		1.29	%
Fee waiver and/or expense reimbursement		0.10	%		0.10	%		0.10	%
Total annual fund operating expenses after the fee waiver and/or expense reimbursement		1.44	%		2.19	%		1.19	%

1

The expense information shown in the table above may differ from the expense information disclosed in the Fund's financial highlights table because the financial highlights table reflects the operating expenses of the Fund and does not include acquired fund fees and expenses.

2

NGAM Advisors, L.P. ("NGAM Advisors") has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.30%, 2.05% and 1.05% of the Fund's average daily net assets for Class A, C and Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, dividend expenses on securities sold short, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through March 31, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Fund's investment adviser will be permitted to recover, on a class by class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitations for Class A, C and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fees or expenses were waived/reimbursed.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same, except that the example is based on Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the first 21 months and on the Total Annual Fund Operating Expenses for the remaining periods. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

If shares are redeemed:
	1 year		3 years		5 years		10 years
Class A	$	713	$	1,017	$	1,350	$	2,290
Class C	$	322	$	698	$	1,209	$	2,612
Class Y	$	121	$	391	$	691	$	1,541

If shares are not redeemed:
	1 year		3 years		5 years		10 years
Class C	$	222	$	698	$	1,209	$	2,612

SEEYOND^SM MULTI-ASSET ALLOCATION FUND

Effective July 1, 2016, Natixis Asset Management U.S., LLC has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses (exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses) to 1.25%, 2.00%, and 1.00% of the Fund's average daily net assets for Class A, Class C and Class Y shares, respectively.

This undertaking is in effect through April 30, 2018.

Additionally, effective July 1, 2016, Natixis Asset Management U.S., LLC has reduced the advisory fee for the Fund.

Accordingly, the Annual Fund Operating Expenses table and the Example table within the section "Fund Fees & Expenses" are amended and restated as follows with respect to the Fund:

Annual Fund Operating Expenses¹

(expenses that you pay each year as a percentage of the value of your investment)

	Class A			Class C			Class Y
Management fees		0.80	%		0.80	%		0.80	%
Distribution and/or service (12b-1) fees		0.25	%		1.00	%		0.00	%
Other expenses		0.50	%		0.48	%		0.44	%
Acquired fund fees and expenses2		0.05	%		0.05	%		0.05	%
Total annual fund operating expenses		1.60	%		2.33	%		1.29	%
Fee waiver and/or expense reimbursement3		0.25	%		0.23	%		0.20	%
Total annual fund operating expenses after fee waiver and/or expense reimbursement		1.35	%		2.10	%		1.09	%

1	The Fund's operating expenses have been restated to reflect a reduction in management fees, effective as of July 1, 2016, as if such reduction had been in effect during the fiscal year ended December 31, 2015. The information has been restated to better reflect anticipated expenses of the Fund.
2	The expense information shown in the table differs from the expense information disclosed in the Fund's financial highlights table because the financial highlights table reflects the operating expenses of the Fund and does not include acquired fund fees and expenses.
3	Natixis Asset Management U.S., LLC ("Natixis AM US" or the "Adviser") has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.25%, 2.00% and 1.00% of the Fund's average daily net assets for Class A, Class C and Class Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through April 30, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Adviser will be permitted to recover, on a class-by-class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitations for Class A, C and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fee/expense was waived/reimbursed.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same, except that the example is based on the Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the first 22 months and on the Total Annual Fund Operating Expenses for the remaining periods. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

If shares are redeemed:
	1 year		3 years		5 years		10 years
Class A	$	705	$	1,008	$	1,354	$	2,329
Class C	$	313	$	686	$	1,206	$	2,633
Class Y	$	111	$	372	$	672	$	1,524

If shares are not redeemed:
	1 year		3 years		5 years		10 years
Class C	$	213	$	686	$	1,206	$	2,633

(Natixis Funds Trust II) | (Loomis Sayles Dividend Income Fund)

Prospectus:

rr_ProspectusTable

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses

(expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

March 31, 2018

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same, except that the example is based on Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the first 21 months and on the Total Annual Fund Operating Expenses for the remaining periods. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

If shares are redeemed:

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

If shares are not redeemed:

(Natixis Funds Trust II) | (Loomis Sayles Dividend Income Fund) | Class A

Prospectus:

rr_ProspectusTable

Management fees

rr_ManagementFeesOverAssets

0.60%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.75%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.60%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.50%

^[1]

Net Expenses Over Assets

rr_NetExpensesOverAssets

1.10%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 681

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

969

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,316

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,295

(Natixis Funds Trust II) | (Loomis Sayles Dividend Income Fund) | Class C

Prospectus:

rr_ProspectusTable

Management fees

rr_ManagementFeesOverAssets

0.60%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.75%

Total annual fund operating expenses

rr_ExpensesOverAssets

2.35%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.50%

^[1]

Net Expenses Over Assets

rr_NetExpensesOverAssets

1.85%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 288

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

648

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,174

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,618

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

188

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

648

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,174

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,618

(Natixis Funds Trust II) | (Loomis Sayles Dividend Income Fund) | Class Y

Prospectus:

rr_ProspectusTable

Management fees

rr_ManagementFeesOverAssets

0.60%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.72%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.32%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.47%

^[1]

Net Expenses Over Assets

rr_NetExpensesOverAssets

0.85%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 87

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

335

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

643

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,517

(Natixis Funds Trust II) | (Vaughan Nelson Select Fund)

Prospectus:

rr_ProspectusTable

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses

(expenses that you pay each year as a percentage of the value of your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

March 31, 2018

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same, except that the example is based on Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the first 21 months and on the Total Annual Fund Operating Expenses for the remaining periods. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

If shares are redeemed:

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

If shares are not redeemed:

(Natixis Funds Trust II) | (Vaughan Nelson Select Fund) | Class A

Prospectus:

rr_ProspectusTable

Management fees

rr_ManagementFeesOverAssets

0.85%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.30%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.14%

^[2],[3]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.54%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.10%

Net Expenses Over Assets

rr_NetExpensesOverAssets

1.44%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 713

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,017

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,350

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,290

(Natixis Funds Trust II) | (Vaughan Nelson Select Fund) | Class C

Prospectus:

rr_ProspectusTable

Management fees

rr_ManagementFeesOverAssets

0.85%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.30%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.14%

^[2],[3]

Total annual fund operating expenses

rr_ExpensesOverAssets

2.29%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.10%

Net Expenses Over Assets

rr_NetExpensesOverAssets

2.19%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 322

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

698

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,209

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,612

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

222

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

698

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,209

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,612

(Natixis Funds Trust II) | (Vaughan Nelson Select Fund) | Class Y

Prospectus:

rr_ProspectusTable

Management fees

rr_ManagementFeesOverAssets

0.85%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.30%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.14%

^[2],[3]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.29%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.10%

Net Expenses Over Assets

rr_NetExpensesOverAssets

1.19%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 121

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

391

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

691

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,541

(Natixis Funds Trust II) | (Seeyond℠ Multi-Asset Allocation Fund)

Prospectus:

rr_ProspectusTable

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses

(expenses that you pay each year as a percentage of the value of your investment)

^[4]

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

March 31, 2018

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods (except where indicated). The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same, except that the example is based on the Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the first 22 months and on the Total Annual Fund Operating Expenses for the remaining periods. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

If shares are redeemed:

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

If shares are not redeemed:

(Natixis Funds Trust II) | (Seeyond℠ Multi-Asset Allocation Fund) | Class A

Prospectus:

rr_ProspectusTable

Management fees

rr_ManagementFeesOverAssets

0.80%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.50%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.05%

^[5]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.60%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.25%

^[6]

Net Expenses Over Assets

rr_NetExpensesOverAssets

1.35%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 705

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,008

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,354

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,329

(Natixis Funds Trust II) | (Seeyond℠ Multi-Asset Allocation Fund) | Class C

Prospectus:

rr_ProspectusTable

Management fees

rr_ManagementFeesOverAssets

0.80%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.48%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.05%

^[5]

Total annual fund operating expenses

rr_ExpensesOverAssets

2.33%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.23%

^[6]

Net Expenses Over Assets

rr_NetExpensesOverAssets

2.10%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 313

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

686

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,206

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,633

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

213

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

686

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,206

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,633

(Natixis Funds Trust II) | (Seeyond℠ Multi-Asset Allocation Fund) | Class Y

Prospectus:

rr_ProspectusTable

Management fees

rr_ManagementFeesOverAssets

0.80%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.44%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.05%

^[5]

Total annual fund operating expenses

rr_ExpensesOverAssets

1.29%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.20%

^[6]

Net Expenses Over Assets

rr_NetExpensesOverAssets

1.09%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 111

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

372

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

672

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,524

[1] Loomis, Sayles & Company, L.P. ("Loomis Sayles" or the "Adviser") has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.10%, 1.85% and 0.85% of the Fund's average daily net assets for Class A, C and Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through March 31, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Adviser will be permitted to recover, on a class by class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitations for Class A, C and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fees or expenses were waived/reimbursed.

[2] NGAM Advisors, L.P. ("NGAM Advisors") has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.30%, 2.05% and 1.05% of the Fund's average daily net assets for Class A, C and Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, dividend expenses on securities sold short, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through March 31, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Fund's investment adviser will be permitted to recover, on a class by class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitations for Class A, C and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fees or expenses were waived/reimbursed.

[3] The expense information shown in the table above may differ from the expense information disclosed in the Fund's financial highlights table because the financial highlights table reflects the operating expenses of the Fund and does not include acquired fund fees and expenses.

[4] The Fund's operating expenses have been restated to reflect a reduction in management fees, effective as of July 1, 2016, as if such reduction had been in effect during the fiscal year ended December 31, 2015. The information has been restated to better reflect anticipated expenses of the Fund.

[5] The expense information shown in the table differs from the expense information disclosed in the Fund's financial highlights table because the financial highlights table reflects the operating expenses of the Fund and does not include acquired fund fees and expenses.

[6] Natixis Asset Management U.S., LLC ("Natixis AM US" or the "Adviser") has given a binding contractual undertaking to the Fund to limit the amount of the Fund's total annual fund operating expenses to 1.25%, 2.00% and 1.00% of the Fund's average daily net assets for Class A, Class C and Class Y shares, respectively, exclusive of brokerage expenses, interest expense, taxes, acquired fund fees and expenses, organizational and extraordinary expenses, such as litigation and indemnification expenses. This undertaking is in effect through April 30, 2018 and may be terminated before then only with the consent of the Fund's Board of Trustees. The Adviser will be permitted to recover, on a class-by-class basis, management fees waived and/or expenses reimbursed to the extent that expenses in later periods fall below the applicable expense limitations for Class A, C and Y shares. The Fund will not be obligated to repay any such waived/reimbursed fees and expenses more than one year after the end of the fiscal year in which the fee/expense was waived/reimbursed.