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Shareholder Report
6 Months Ended
May 31, 2024
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Natixis Funds Trust II
Entity Central Index Key 0000052136
Entity Investment Company Type N-1A
Document Period End Date May 31, 2024
C000188120  
Shareholder Report [Line Items]  
Fund Name Vaughan Nelson Select Fund
Class Name Class N
Trading Symbol VNSNX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Vaughan Nelson Select Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class N
$42
0.80%
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.80%
AssetsNet $ 760,352,001
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,434,812
InvestmentCompanyPortfolioTurnover 41.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$760,352,001
# of Portfolio Holdings
26
Portfolio Turnover Rate
41%
Total Advisory Fees Paid
$2,434,812
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
7.1%
Short-Term Investments
3.1%
Insurance
3.2%
Capital Markets
3.5%
Specialty Retail
3.6%
Health Care Equipment & Supplies
3.7%
Financial Services
3.9%
Entertainment
3.9%
Pharmaceuticals
4.5%
Oil, Gas & Consumable Fuels
4.7%
Life Sciences Tools & Services
5.0%
Banks
5.2%
Broadline Retail
5.7%
Chemicals
6.0%
Interactive Media & Services
6.1%
Ground Transportation
6.2%
Software
9.0%
Semiconductors & Semiconductor Equipment
15.6%
Footnote Description
Footnote*
Net of other assets less liabilities
Largest Holdings [Text Block]

Top Ten Holdings

Microsoft Corp.
7.1%
NVIDIA Corp.
6.3%
Alphabet, Inc., Class A
6.1%
Amazon.com, Inc.
5.8%
Monolithic Power Systems, Inc.
5.2%
JPMorgan Chase & Co.
5.2%
Danaher Corp.
5.0%
Zoetis, Inc.
4.5%
ON Semiconductor Corp.
4.1%
Walt Disney Co.
3.9%
C000115833  
Shareholder Report [Line Items]  
Fund Name Vaughan Nelson Select Fund
Class Name Class Y
Trading Symbol VNSYX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Vaughan Nelson Select Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class Y
$44
0.85%
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.85%
AssetsNet $ 760,352,001
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,434,812
InvestmentCompanyPortfolioTurnover 41.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$760,352,001
# of Portfolio Holdings
26
Portfolio Turnover Rate
41%
Total Advisory Fees Paid
$2,434,812
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
7.1%
Short-Term Investments
3.1%
Insurance
3.2%
Capital Markets
3.5%
Specialty Retail
3.6%
Health Care Equipment & Supplies
3.7%
Financial Services
3.9%
Entertainment
3.9%
Pharmaceuticals
4.5%
Oil, Gas & Consumable Fuels
4.7%
Life Sciences Tools & Services
5.0%
Banks
5.2%
Broadline Retail
5.7%
Chemicals
6.0%
Interactive Media & Services
6.1%
Ground Transportation
6.2%
Software
9.0%
Semiconductors & Semiconductor Equipment
15.6%
Footnote Description
Footnote*
Net of other assets less liabilities
Largest Holdings [Text Block]

Top Ten Holdings

Microsoft Corp.
7.1%
NVIDIA Corp.
6.3%
Alphabet, Inc., Class A
6.1%
Amazon.com, Inc.
5.8%
Monolithic Power Systems, Inc.
5.2%
JPMorgan Chase & Co.
5.2%
Danaher Corp.
5.0%
Zoetis, Inc.
4.5%
ON Semiconductor Corp.
4.1%
Walt Disney Co.
3.9%
C000105119  
Shareholder Report [Line Items]  
Fund Name Loomis Sayles Senior Floating Rate and Fixed Income Fund
Class Name Class C
Trading Symbol LSFCX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Loomis Sayles Senior Floating Rate and Fixed Income Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class C
$90
1.75%
Expenses Paid, Amount $ 90
Expense Ratio, Percent 1.75%
Material Change Description [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Material Change Date Jul. 01, 2024
AssetsNet $ 813,711,453
Holdings Count | Holding 292
Advisory Fees Paid, Amount $ 2,287,407
InvestmentCompanyPortfolioTurnover 50.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$813,711,453
# of Portfolio Holdings
292
Portfolio Turnover Rate
50%
Total Advisory Fees Paid
$2,287,407
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
30.3%
Short-Term Investments
9.6%
Exchange-Traded Funds
1.5%
Consumer Products
3.5%
Property & Casualty Insurance
3.7%
Building Materials
3.7%
Brokerage
4.1%
Consumer Cyclical Services
6.7%
Retailers
7.7%
Media Entertainment
7.7%
Healthcare
7.9%
Technology
13.6%
Footnote Description
Footnote*
Net of other assets less liabilities
Material Fund Change Expenses [Text Block]

Expenses: The expense limit as a percentage of average daily net assets was reduced to 1.73% from 1.75%.

C000167848  
Shareholder Report [Line Items]  
Fund Name Loomis Sayles Global Growth Fund
Class Name Class A
Trading Symbol LSAGX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Loomis Sayles Global Growth Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$63
1.20%
Expenses Paid, Amount $ 63
Expense Ratio, Percent 1.20%
AssetsNet $ 95,166,661
Holdings Count | Holding 45
Advisory Fees Paid, Amount $ 274,509
InvestmentCompanyPortfolioTurnover 4.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$95,166,661
# of Portfolio Holdings
45
Portfolio Turnover Rate
4%
Total Advisory Fees Paid
$274,509
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
15.5%
Automobiles
3.7%
Aerospace & Defense
3.8%
Entertainment
4.3%
Hotels, Restaurants & Leisure
4.8%
Biotechnology
5.0%
Semiconductors & Semiconductor Equipment
5.9%
Financial Services
7.9%
Pharmaceuticals
8.1%
Software
10.3%
Broadline Retail
14.0%
Interactive Media & Services
16.7%
Footnote Description
Footnote*
Net of other assets less liabilities
C000188118  
Shareholder Report [Line Items]  
Fund Name Loomis Sayles Senior Floating Rate and Fixed Income Fund
Class Name Class N
Trading Symbol LSFNX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Loomis Sayles Senior Floating Rate and Fixed Income Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class N
$36
0.70%
Expenses Paid, Amount $ 36
Expense Ratio, Percent 0.70%
Material Change Description [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Material Change Date Jul. 01, 2024
AssetsNet $ 813,711,453
Holdings Count | Holding 292
Advisory Fees Paid, Amount $ 2,287,407
InvestmentCompanyPortfolioTurnover 50.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$813,711,453
# of Portfolio Holdings
292
Portfolio Turnover Rate
50%
Total Advisory Fees Paid
$2,287,407
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
30.3%
Short-Term Investments
9.6%
Exchange-Traded Funds
1.5%
Consumer Products
3.5%
Property & Casualty Insurance
3.7%
Building Materials
3.7%
Brokerage
4.1%
Consumer Cyclical Services
6.7%
Retailers
7.7%
Media Entertainment
7.7%
Healthcare
7.9%
Technology
13.6%
Footnote Description
Footnote*
Net of other assets less liabilities
Material Fund Change Expenses [Text Block]

Expenses: The expense limit as a percentage of average daily net assets was reduced to 0.68% from 0.70%.

C000105120  
Shareholder Report [Line Items]  
Fund Name Loomis Sayles Senior Floating Rate and Fixed Income Fund
Class Name Class Y
Trading Symbol LSFYX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Loomis Sayles Senior Floating Rate and Fixed Income Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class Y
$38
0.75%
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75%
Material Change Description [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Material Change Date Jul. 01, 2024
AssetsNet $ 813,711,453
Holdings Count | Holding 292
Advisory Fees Paid, Amount $ 2,287,407
InvestmentCompanyPortfolioTurnover 50.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$813,711,453
# of Portfolio Holdings
292
Portfolio Turnover Rate
50%
Total Advisory Fees Paid
$2,287,407
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
30.3%
Short-Term Investments
9.6%
Exchange-Traded Funds
1.5%
Consumer Products
3.5%
Property & Casualty Insurance
3.7%
Building Materials
3.7%
Brokerage
4.1%
Consumer Cyclical Services
6.7%
Retailers
7.7%
Media Entertainment
7.7%
Healthcare
7.9%
Technology
13.6%
Footnote Description
Footnote*
Net of other assets less liabilities
Material Fund Change Expenses [Text Block]

Expenses: The expense limit as a percentage of average daily net assets was reduced to 0.73% from 0.75%.

C000115831  
Shareholder Report [Line Items]  
Fund Name Vaughan Nelson Select Fund
Class Name Class A
Trading Symbol VNSAX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Vaughan Nelson Select Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$58
1.10%
Expenses Paid, Amount $ 58
Expense Ratio, Percent 1.10%
AssetsNet $ 760,352,001
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,434,812
InvestmentCompanyPortfolioTurnover 41.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$760,352,001
# of Portfolio Holdings
26
Portfolio Turnover Rate
41%
Total Advisory Fees Paid
$2,434,812
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
7.1%
Short-Term Investments
3.1%
Insurance
3.2%
Capital Markets
3.5%
Specialty Retail
3.6%
Health Care Equipment & Supplies
3.7%
Financial Services
3.9%
Entertainment
3.9%
Pharmaceuticals
4.5%
Oil, Gas & Consumable Fuels
4.7%
Life Sciences Tools & Services
5.0%
Banks
5.2%
Broadline Retail
5.7%
Chemicals
6.0%
Interactive Media & Services
6.1%
Ground Transportation
6.2%
Software
9.0%
Semiconductors & Semiconductor Equipment
15.6%
Footnote Description
Footnote*
Net of other assets less liabilities
Largest Holdings [Text Block]

Top Ten Holdings

Microsoft Corp.
7.1%
NVIDIA Corp.
6.3%
Alphabet, Inc., Class A
6.1%
Amazon.com, Inc.
5.8%
Monolithic Power Systems, Inc.
5.2%
JPMorgan Chase & Co.
5.2%
Danaher Corp.
5.0%
Zoetis, Inc.
4.5%
ON Semiconductor Corp.
4.1%
Walt Disney Co.
3.9%
C000167849  
Shareholder Report [Line Items]  
Fund Name Loomis Sayles Global Growth Fund
Class Name Class C
Trading Symbol LSCGX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Loomis Sayles Global Growth Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class C
$102
1.95%
Expenses Paid, Amount $ 102
Expense Ratio, Percent 1.95%
AssetsNet $ 95,166,661
Holdings Count | Holding 45
Advisory Fees Paid, Amount $ 274,509
InvestmentCompanyPortfolioTurnover 4.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$95,166,661
# of Portfolio Holdings
45
Portfolio Turnover Rate
4%
Total Advisory Fees Paid
$274,509
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
15.5%
Automobiles
3.7%
Aerospace & Defense
3.8%
Entertainment
4.3%
Hotels, Restaurants & Leisure
4.8%
Biotechnology
5.0%
Semiconductors & Semiconductor Equipment
5.9%
Financial Services
7.9%
Pharmaceuticals
8.1%
Software
10.3%
Broadline Retail
14.0%
Interactive Media & Services
16.7%
Footnote Description
Footnote*
Net of other assets less liabilities
C000105118  
Shareholder Report [Line Items]  
Fund Name Loomis Sayles Senior Floating Rate and Fixed Income Fund
Class Name Class A
Trading Symbol LSFAX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Loomis Sayles Senior Floating Rate and Fixed Income Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$51
1.00%
Expenses Paid, Amount $ 51
Expense Ratio, Percent 1.00%
Material Change Description [Text Block] This report describes changes to the Fund that occurred during the reporting period.
Material Change Date Jul. 01, 2024
AssetsNet $ 813,711,453
Holdings Count | Holding 292
Advisory Fees Paid, Amount $ 2,287,407
InvestmentCompanyPortfolioTurnover 50.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$813,711,453
# of Portfolio Holdings
292
Portfolio Turnover Rate
50%
Total Advisory Fees Paid
$2,287,407
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
30.3%
Short-Term Investments
9.6%
Exchange-Traded Funds
1.5%
Consumer Products
3.5%
Property & Casualty Insurance
3.7%
Building Materials
3.7%
Brokerage
4.1%
Consumer Cyclical Services
6.7%
Retailers
7.7%
Media Entertainment
7.7%
Healthcare
7.9%
Technology
13.6%
Footnote Description
Footnote*
Net of other assets less liabilities
Material Fund Change Expenses [Text Block]

Expenses: The expense limit as a percentage of average daily net assets was reduced to 0.98% from 1.00%.

C000115832  
Shareholder Report [Line Items]  
Fund Name Vaughan Nelson Select Fund
Class Name Class C
Trading Symbol VNSCX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Vaughan Nelson Select Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class C
$97
1.85%
Expenses Paid, Amount $ 97
Expense Ratio, Percent 1.85%
AssetsNet $ 760,352,001
Holdings Count | Holding 26
Advisory Fees Paid, Amount $ 2,434,812
InvestmentCompanyPortfolioTurnover 41.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$760,352,001
# of Portfolio Holdings
26
Portfolio Turnover Rate
41%
Total Advisory Fees Paid
$2,434,812
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
7.1%
Short-Term Investments
3.1%
Insurance
3.2%
Capital Markets
3.5%
Specialty Retail
3.6%
Health Care Equipment & Supplies
3.7%
Financial Services
3.9%
Entertainment
3.9%
Pharmaceuticals
4.5%
Oil, Gas & Consumable Fuels
4.7%
Life Sciences Tools & Services
5.0%
Banks
5.2%
Broadline Retail
5.7%
Chemicals
6.0%
Interactive Media & Services
6.1%
Ground Transportation
6.2%
Software
9.0%
Semiconductors & Semiconductor Equipment
15.6%
Footnote Description
Footnote*
Net of other assets less liabilities
Largest Holdings [Text Block]

Top Ten Holdings

Microsoft Corp.
7.1%
NVIDIA Corp.
6.3%
Alphabet, Inc., Class A
6.1%
Amazon.com, Inc.
5.8%
Monolithic Power Systems, Inc.
5.2%
JPMorgan Chase & Co.
5.2%
Danaher Corp.
5.0%
Zoetis, Inc.
4.5%
ON Semiconductor Corp.
4.1%
Walt Disney Co.
3.9%
C000188122  
Shareholder Report [Line Items]  
Fund Name Loomis Sayles Global Growth Fund
Class Name Class N
Trading Symbol LSNGX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Loomis Sayles Global Growth Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class N
$47
0.90%
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.90%
AssetsNet $ 95,166,661
Holdings Count | Holding 45
Advisory Fees Paid, Amount $ 274,509
InvestmentCompanyPortfolioTurnover 4.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$95,166,661
# of Portfolio Holdings
45
Portfolio Turnover Rate
4%
Total Advisory Fees Paid
$274,509
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
15.5%
Automobiles
3.7%
Aerospace & Defense
3.8%
Entertainment
4.3%
Hotels, Restaurants & Leisure
4.8%
Biotechnology
5.0%
Semiconductors & Semiconductor Equipment
5.9%
Financial Services
7.9%
Pharmaceuticals
8.1%
Software
10.3%
Broadline Retail
14.0%
Interactive Media & Services
16.7%
Footnote Description
Footnote*
Net of other assets less liabilities
C000167850  
Shareholder Report [Line Items]  
Fund Name Loomis Sayles Global Growth Fund
Class Name Class Y
Trading Symbol LSGGX
Annual or Semi-Annual Statement [Text Block] This Semi-annual report contains important information about Loomis Sayles Global Growth Fund for the period of December 1, 2023 to May 31, 2024.
Shareholder Report Annual or Semi-Annual Semi-annual Shareholder Report
Additional Information [Text Block] You can find additional information (including tax information) about the Fund at im.natixis.com/funddocuments.You can also request the information by contacting us at 800-225-5478 or by contacting your financial intermediary directly.
Additional Information Phone Number 800-225-5478
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">im.natixis.com/funddocuments</span>
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class Y
$50
0.95%
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.95%
AssetsNet $ 95,166,661
Holdings Count | Holding 45
Advisory Fees Paid, Amount $ 274,509
InvestmentCompanyPortfolioTurnover 4.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets
$95,166,661
# of Portfolio Holdings
45
Portfolio Turnover Rate
4%
Total Advisory Fees Paid
$274,509
Holdings [Text Block]

Industry Summary

Group By Sector Chart
Value
Value
Other investments less than 3% of net assetsFootnote Reference*
15.5%
Automobiles
3.7%
Aerospace & Defense
3.8%
Entertainment
4.3%
Hotels, Restaurants & Leisure
4.8%
Biotechnology
5.0%
Semiconductors & Semiconductor Equipment
5.9%
Financial Services
7.9%
Pharmaceuticals
8.1%
Software
10.3%
Broadline Retail
14.0%
Interactive Media & Services
16.7%
Footnote Description
Footnote*
Net of other assets less liabilities