| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | AMG Funds III |
| Entity Central Index Key | 0000720309 |
| Document Period End Date | Jun. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | AMG Funds III |
| Entity Central Index Key | 0000720309 |
| Document Period End Date | Jun. 30, 2024 |
| C000027311 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | AMG GW&K High Income Fund |
| Class Name | Class N |
| Trading Symbol | MGGBX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about AMG GW&K High Income Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://wealth.amg.com/resources/order-literature |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 800-548-4539 |
| Additional Information Website | https://wealth.amg.com/resources/order-literature |
| Expenses [Text Block] | Fund Expenses What were the Fund costs for the last six months? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment AMG GW&K High Income Fund $ 0.82 % |
| Expenses Paid, Amount | $ 41 |
| Expense Ratio, Percent | 0.82% |
| Material Change Date | Jan. 01, 2024 |
| Net Assets | $ 6,686,315 |
| Holdings Count | Holding | 1 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 25% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of Fund net assets $ % Total number of portfolio holdings $ % Net advisory fees paid $ % Portfolio turnover rate as of the end of the reporting period $ % |
| Holdings [Text Block] | Graphical Representation of Holdings (as of June 30, 2024) Top ten holdings and portfolio breakdown are shown as a percentage of net assets of the Fund. Top Ten Holdings Dreyfus Institutional Preferred Government Money Market Fund, Institutional Shares, 5.270% 100.9 % Top Ten as a Group 100.9 % Portfolio Breakdown |
| Largest Holdings [Text Block] | Top Ten Holdings Dreyfus Institutional Preferred Government Money Market Fund, Institutional Shares, 5.270% 100.9 % Top Ten as a Group 100.9 % |
| Material Fund Change [Text Block] | Recent Fund Changes This is a summary of certain changes to the Fund since January 1, 2024. For more complete https://wealth.amg.com/resources/order-literature The Board of Trustees of AMG Funds III |
| Updated Prospectus Phone Number | 800.548.4539 |
| Updated Prospectus Email Address | shareholderservices@amg.com |
| Updated Prospectus Web Address | https://wealth.amg.com/resources/order-literature |
| C000225453 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | AMG GW&K High Income Fund |
| Class Name | Class I |
| Trading Symbol | GWHIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about AMG GW&K High Income Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://wealth.amg.com/resources/order-literature |
| Material Fund Change Notice [Text Block] | This report describes changes to the Fund that occurred during the reporting period. |
| Additional Information Phone Number | 800-548-4539 |
| Additional Information Website | https://wealth.amg.com/resources/order-literature |
| Expenses [Text Block] | Fund Expenses What were the Fund costs for the last six months? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment AMG GW&K High Income Fund $ 0.62 % |
| Expenses Paid, Amount | $ 31 |
| Expense Ratio, Percent | 0.62% |
| Material Change Date | Jan. 01, 2024 |
| Net Assets | $ 6,686,315 |
| Holdings Count | Holding | 1 |
| Advisory Fees Paid, Amount | $ 0 |
| Investment Company Portfolio Turnover | 25% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of Fund net assets $ % Total number of portfolio holdings $ % Net advisory fees paid $ % Portfolio turnover rate as of the end of the reporting period $ % |
| Holdings [Text Block] | Graphical Representation of Holdings (as of June 30, 2024) Top ten holdings and portfolio breakdown are shown as a percentage of net assets of the Fund. Top Ten Holdings Dreyfus Institutional Preferred Government Money Market Fund, Institutional Shares, 5.270% 100.9 % Top Ten as a Group 100.9 % Portfolio Breakdown |
| Largest Holdings [Text Block] | Top Ten Holdings Dreyfus Institutional Preferred Government Money Market Fund, Institutional Shares, 5.270% 100.9 % Top Ten as a Group 100.9 % |
| Material Fund Change [Text Block] | Recent Fund Changes This is a summary of certain changes to the Fund since January 1, 2024. For more complete https://wealth.amg.com/resources/order-literature The Board of Trustees of AMG Funds III |
| Updated Prospectus Phone Number | 800.548.4539 |
| Updated Prospectus Email Address | shareholderservices@amg.com |
| Updated Prospectus Web Address | https://wealth.amg.com/resources/order-literature |
| C000027305 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | AMG Veritas Asia Pacific Fund |
| Class Name | Class N |
| Trading Symbol | MGSEX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about AMG Veritas Asia Pacific Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://wealth.amg.com/resources/order-literature |
| Additional Information Phone Number | 800-548-4539 |
| Additional Information Website | https://wealth.amg.com/resources/order-literature |
| Expenses [Text Block] | Fund Expenses What were the Fund costs for the last six months? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment AMG Veritas Asia Pacific Fund $ 1.17 % |
| Expenses Paid, Amount | $ 61 |
| Expense Ratio, Percent | 1.17% |
| Net Assets | $ 88,229,688 |
| Holdings Count | Holding | 46 |
| Advisory Fees Paid, Amount | $ 228,065 |
| Investment Company Portfolio Turnover | 39% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of Fund net assets $ % Total number of portfolio holdings $ % Net advisory fees paid $ % Portfolio turnover rate as of the end of the reporting period $ % |
| Holdings [Text Block] | Graphical Representation of Holdings (as of June 30, 2024) Top ten holdings and portfolio breakdown are shown as a percentage of net assets of the Fund and country allocation is shown as a percentage of total long-term investments of the Fund. Top Ten Holdings Taiwan Semiconductor Manufacturing Co., Ltd. (Taiwan) 17.0 % Tencent Holdings, Ltd. (China) 7.8 % Samsung Electronics Co., Ltd. (South Korea) 7.8 % Alibaba Group Holding, Ltd. (China) 6.1 % Goodman Group (Australia) 4.6 % HDFC Bank, Ltd., ADR (India) 4.1 % SK Hynix, Inc. (South Korea) 4.0 % REA Group, Ltd. (Australia) 3.6 % Aristocrat Leisure, Ltd. (Australia) 3.3 % Hanwha Aerospace Co., Ltd. (South Korea) 2.6 % Top Ten as a Group 60.9 % Portfolio Breakdown Country Allocation |
| Largest Holdings [Text Block] | Top Ten Holdings Taiwan Semiconductor Manufacturing Co., Ltd. (Taiwan) 17.0 % Tencent Holdings, Ltd. (China) 7.8 % Samsung Electronics Co., Ltd. (South Korea) 7.8 % Alibaba Group Holding, Ltd. (China) 6.1 % Goodman Group (Australia) 4.6 % HDFC Bank, Ltd., ADR (India) 4.1 % SK Hynix, Inc. (South Korea) 4.0 % REA Group, Ltd. (Australia) 3.6 % Aristocrat Leisure, Ltd. (Australia) 3.3 % Hanwha Aerospace Co., Ltd. (South Korea) 2.6 % Top Ten as a Group 60.9 % |
| C000027306 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | AMG Veritas Asia Pacific Fund |
| Class Name | Class I |
| Trading Symbol | MSEIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about AMG Veritas Asia Pacific Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://wealth.amg.com/resources/order-literature |
| Additional Information Phone Number | 800-548-4539 |
| Additional Information Website | https://wealth.amg.com/resources/order-literature |
| Expenses [Text Block] | Fund Expenses What were the Fund costs for the last six months? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment AMG Veritas Asia Pacific Fund $ 0.93 % |
| Expenses Paid, Amount | $ 48 |
| Expense Ratio, Percent | 0.93% |
| Net Assets | $ 88,229,688 |
| Holdings Count | Holding | 46 |
| Advisory Fees Paid, Amount | $ 228,065 |
| Investment Company Portfolio Turnover | 39% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of Fund net assets $ % Total number of portfolio holdings $ % Net advisory fees paid $ % Portfolio turnover rate as of the end of the reporting period $ % |
| Holdings [Text Block] | Graphical Representation of Holdings (as of June 30, 2024) Top ten holdings and portfolio breakdown are shown as a percentage of net assets of the Fund and country allocation is shown as a percentage of total long-term investments of the Fund. Top Ten Holdings Taiwan Semiconductor Manufacturing Co., Ltd. (Taiwan) 17.0 % Tencent Holdings, Ltd. (China) 7.8 % Samsung Electronics Co., Ltd. (South Korea) 7.8 % Alibaba Group Holding, Ltd. (China) 6.1 % Goodman Group (Australia) 4.6 % HDFC Bank, Ltd., ADR (India) 4.1 % SK Hynix, Inc. (South Korea) 4.0 % REA Group, Ltd. (Australia) 3.6 % Aristocrat Leisure, Ltd. (Australia) 3.3 % Hanwha Aerospace Co., Ltd. (South Korea) 2.6 % Top Ten as a Group 60.9 % Portfolio Breakdown Country Allocation |
| Largest Holdings [Text Block] | Top Ten Holdings Taiwan Semiconductor Manufacturing Co., Ltd. (Taiwan) 17.0 % Tencent Holdings, Ltd. (China) 7.8 % Samsung Electronics Co., Ltd. (South Korea) 7.8 % Alibaba Group Holding, Ltd. (China) 6.1 % Goodman Group (Australia) 4.6 % HDFC Bank, Ltd., ADR (India) 4.1 % SK Hynix, Inc. (South Korea) 4.0 % REA Group, Ltd. (Australia) 3.6 % Aristocrat Leisure, Ltd. (Australia) 3.3 % Hanwha Aerospace Co., Ltd. (South Korea) 2.6 % Top Ten as a Group 60.9 % |
| C000027310 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | AMG GW&K ESG Bond Fund |
| Class Name | Class N |
| Trading Symbol | MGFIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about AMG GW&K ESG Bond Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://wealth.amg.com/resources/order-literature |
| Additional Information Phone Number | 800-548-4539 |
| Additional Information Website | https://wealth.amg.com/resources/order-literature |
| Expenses [Text Block] | Fund Expenses What were the Fund costs for the last six months? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment AMG GW&K ESG Bond Fund $ 0.68 % |
| Expenses Paid, Amount | $ 34 |
| Expense Ratio, Percent | 0.68% |
| Net Assets | $ 397,878,366 |
| Holdings Count | Holding | 149 |
| Advisory Fees Paid, Amount | $ 406,227 |
| Investment Company Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of Fund net assets $ % Total number of portfolio holdings $ % Net advisory fees paid $ % Portfolio turnover rate as of the end of the reporting period $ % |
| Holdings [Text Block] | Graphical Representation of Holdings (as of June 30, 2024) Top ten holdings and portfolio breakdown are shown as a percentage of net assets of the Fund and ratings are shown as a percentage of total long-term investments of the Fund. Top Ten Holdings FHLMC, 3.000%, 04/01/51 3.2 % U.S. Treasury Bonds, 2.250%, 05/15/41 3.0 % FNMA, 3.500%, 08/01/49 2.2 % U.S. Treasury Bonds, 1.875%, 02/15/51 2.2 % U.S. Treasury Bonds, 3.125%, 05/15/48 2.2 % FNMA, 3.500%, 02/01/35 2.1 % FNMA, 3.500%, 02/01/47 1.8 % FHLMC, 3.500%, 02/01/50 1.8 % FHLMC, 4.500%, 12/01/48 1.7 % FNMA, 4.000%, 06/01/48 1.7 % Top Ten as a Group 21.9 % Portfolio Breakdown Ratings |
| Largest Holdings [Text Block] | Top Ten Holdings FHLMC, 3.000%, 04/01/51 3.2 % U.S. Treasury Bonds, 2.250%, 05/15/41 3.0 % FNMA, 3.500%, 08/01/49 2.2 % U.S. Treasury Bonds, 1.875%, 02/15/51 2.2 % U.S. Treasury Bonds, 3.125%, 05/15/48 2.2 % FNMA, 3.500%, 02/01/35 2.1 % FNMA, 3.500%, 02/01/47 1.8 % FHLMC, 3.500%, 02/01/50 1.8 % FHLMC, 4.500%, 12/01/48 1.7 % FNMA, 4.000%, 06/01/48 1.7 % Top Ten as a Group 21.9 % |
| C000125498 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | AMG GW&K ESG Bond Fund |
| Class Name | Class I |
| Trading Symbol | MGBIX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about AMG GW&K ESG Bond Fund (the “Fund”) for the period of January 1, 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://wealth.amg.com/resources/order-literature |
| Additional Information Phone Number | 800-548-4539 |
| Additional Information Website | https://wealth.amg.com/resources/order-literature |
| Expenses [Text Block] | Fund Expenses What were the Fund costs for the last six months? (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment AMG GW&K ESG Bond Fund $ 0.48 % |
| Expenses Paid, Amount | $ 24 |
| Expense Ratio, Percent | 0.48% |
| Net Assets | $ 397,878,366 |
| Holdings Count | Holding | 149 |
| Advisory Fees Paid, Amount | $ 406,227 |
| Investment Company Portfolio Turnover | 18% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of Fund net assets $ % Total number of portfolio holdings $ % Net advisory fees paid $ % Portfolio turnover rate as of the end of the reporting period $ % |
| Holdings [Text Block] | Graphical Representation of Holdings (as of June 30, 2024) Top ten holdings and portfolio breakdown are shown as a percentage of net assets of the Fund and ratings are shown as a percentage of total long-term investments of the Fund. Top Ten Holdings FHLMC, 3.000%, 04/01/51 3.2 % U.S. Treasury Bonds, 2.250%, 05/15/41 3.0 % FNMA, 3.500%, 08/01/49 2.2 % U.S. Treasury Bonds, 1.875%, 02/15/51 2.2 % U.S. Treasury Bonds, 3.125%, 05/15/48 2.2 % FNMA, 3.500%, 02/01/35 2.1 % FNMA, 3.500%, 02/01/47 1.8 % FHLMC, 3.500%, 02/01/50 1.8 % FHLMC, 4.500%, 12/01/48 1.7 % FNMA, 4.000%, 06/01/48 1.7 % Top Ten as a Group 21.9 % Portfolio Breakdown Ratings |
| Largest Holdings [Text Block] | Top Ten Holdings FHLMC, 3.000%, 04/01/51 3.2 % U.S. Treasury Bonds, 2.250%, 05/15/41 3.0 % FNMA, 3.500%, 08/01/49 2.2 % U.S. Treasury Bonds, 1.875%, 02/15/51 2.2 % U.S. Treasury Bonds, 3.125%, 05/15/48 2.2 % FNMA, 3.500%, 02/01/35 2.1 % FNMA, 3.500%, 02/01/47 1.8 % FHLMC, 3.500%, 02/01/50 1.8 % FHLMC, 4.500%, 12/01/48 1.7 % FNMA, 4.000%, 06/01/48 1.7 % Top Ten as a Group 21.9 % |
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| C000027311 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100.90% |
| C000027311 [Member] | Dreyfus Institutional Preferred Government Money Market Fund Institutional Shares 5 270 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100.90% |
| C000027311 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100.90% |
| C000027311 [Member] | Other Assets less Liabilities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.90%) |
| C000225453 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100.90% |
| C000225453 [Member] | Dreyfus Institutional Preferred Government Money Market Fund Institutional Shares 5 270 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100.90% |
| C000225453 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100.90% |
| C000225453 [Member] | Other Assets less Liabilities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.90%) |
| C000027305 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 60.90% |
| C000027305 [Member] | Taiwan Semiconductor Manufacturing Co Ltd Taiwan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000027305 [Member] | Tencent Holdings Ltd China [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000027305 [Member] | Samsung Electronics Co Ltd South Korea [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000027305 [Member] | Alibaba Group Holding Ltd China [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000027305 [Member] | Goodman Group Australia [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| C000027305 [Member] | HDFC Bank Ltd ADR India [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000027305 [Member] | SK Hynix Inc South Korea [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000027305 [Member] | REA Group Ltd Australia [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000027305 [Member] | Aristocrat Leisure Ltd Australia [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000027305 [Member] | Hanwha Aerospace Co Ltd South Korea [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000027305 [Member] | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000027305 [Member] | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000027305 [Member] | Real Estate Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| C000027305 [Member] | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.80% |
| C000027305 [Member] | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| C000027305 [Member] | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000027305 [Member] | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000027305 [Member] | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 37.30% |
| C000027305 [Member] | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000027305 [Member] | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000027305 [Member] | AUSTRALIA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.90% |
| C000027305 [Member] | CHINA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21.30% |
| C000027305 [Member] | HONG KONG | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000027305 [Member] | INDIA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.30% |
| C000027305 [Member] | KOREA, REPUBLIC OF | |
| Holdings [Line Items] | |
| Percent of Total Investments | 22.80% |
| C000027305 [Member] | MACAO | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.30% |
| C000027305 [Member] | TAIWAN | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21.30% |
| C000027305 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000027305 [Member] | Other Assets less Liabilities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000027306 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 60.90% |
| C000027306 [Member] | Taiwan Semiconductor Manufacturing Co Ltd Taiwan [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 17% |
| C000027306 [Member] | Tencent Holdings Ltd China [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000027306 [Member] | Samsung Electronics Co Ltd South Korea [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| C000027306 [Member] | Alibaba Group Holding Ltd China [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.10% |
| C000027306 [Member] | Goodman Group Australia [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| C000027306 [Member] | HDFC Bank Ltd ADR India [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000027306 [Member] | SK Hynix Inc South Korea [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000027306 [Member] | REA Group Ltd Australia [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000027306 [Member] | Aristocrat Leisure Ltd Australia [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.30% |
| C000027306 [Member] | Hanwha Aerospace Co Ltd South Korea [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000027306 [Member] | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000027306 [Member] | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000027306 [Member] | Real Estate Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.60% |
| C000027306 [Member] | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.80% |
| C000027306 [Member] | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.90% |
| C000027306 [Member] | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.60% |
| C000027306 [Member] | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.30% |
| C000027306 [Member] | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 37.30% |
| C000027306 [Member] | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000027306 [Member] | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| C000027306 [Member] | AUSTRALIA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 14.90% |
| C000027306 [Member] | CHINA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21.30% |
| C000027306 [Member] | HONG KONG | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000027306 [Member] | INDIA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.30% |
| C000027306 [Member] | KOREA, REPUBLIC OF | |
| Holdings [Line Items] | |
| Percent of Total Investments | 22.80% |
| C000027306 [Member] | MACAO | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.30% |
| C000027306 [Member] | TAIWAN | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21.30% |
| C000027306 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000027306 [Member] | Other Assets less Liabilities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0% |
| C000027310 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.90% |
| C000027310 [Member] | FHLMC 3 000 04 01 51 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000027310 [Member] | U S Treasury Bonds 2 250 05 15 41 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000027310 [Member] | FNMA 3 500 08 01 49 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000027310 [Member] | U S Treasury Bonds 1 875 02 15 51 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000027310 [Member] | U S Treasury Bonds 3 125 05 15 48 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000027310 [Member] | FNMA 3 500 02 01 35 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| C000027310 [Member] | FNMA 3 500 02 01 47 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000027310 [Member] | FHLMC 3 500 02 01 50 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000027310 [Member] | FHLMC 4 500 12 01 48 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000027310 [Member] | FNMA 4 000 06 01 48 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000027310 [Member] | Aaa AAA [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| C000027310 [Member] | Aa AA [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6% |
| C000027310 [Member] | A [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.70% |
| C000027310 [Member] | Baa BBB [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 20.40% |
| C000027310 [Member] | Ba BB [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.60% |
| C000027310 [Member] | B [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.70% |
| C000027310 [Member] | US Government Corporations and Agencies Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 41.30% |
| C000027310 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| C000027310 [Member] | Other Assets less Liabilities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (3.80%) |
| C000027310 [Member] | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000027310 [Member] | Collateralized Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000027310 [Member] | Municipal Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000027310 [Member] | US Government Corporations and Agencies Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 40.80% |
| C000027310 [Member] | Corporate Bonds and Notes [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 49.40% |
| C000125498 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.90% |
| C000125498 [Member] | FHLMC 3 000 04 01 51 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| C000125498 [Member] | U S Treasury Bonds 2 250 05 15 41 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| C000125498 [Member] | FNMA 3 500 08 01 49 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000125498 [Member] | U S Treasury Bonds 1 875 02 15 51 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000125498 [Member] | U S Treasury Bonds 3 125 05 15 48 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| C000125498 [Member] | FNMA 3 500 02 01 35 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| C000125498 [Member] | FNMA 3 500 02 01 47 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000125498 [Member] | FHLMC 3 500 02 01 50 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000125498 [Member] | FHLMC 4 500 12 01 48 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000125498 [Member] | FNMA 4 000 06 01 48 [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| C000125498 [Member] | Aaa AAA [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| C000125498 [Member] | Aa AA [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6% |
| C000125498 [Member] | A [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.70% |
| C000125498 [Member] | Baa BBB [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 20.40% |
| C000125498 [Member] | Ba BB [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.60% |
| C000125498 [Member] | B [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.70% |
| C000125498 [Member] | US Government Corporations and Agencies Securities Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 41.30% |
| C000125498 [Member] | Short-Term Investments [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.10% |
| C000125498 [Member] | Other Assets less Liabilities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (3.80%) |
| C000125498 [Member] | Asset-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000125498 [Member] | Collateralized Mortgage-Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| C000125498 [Member] | Municipal Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| C000125498 [Member] | US Government Corporations and Agencies Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 40.80% |
| C000125498 [Member] | Corporate Bonds and Notes [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 49.40% |
