| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | MFS VARIABLE INSURANCE TRUST III |
| Entity Central Index Key | 0001065698 |
| 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 | MFS VARIABLE INSURANCE TRUST III | |
| Entity Central Index Key | 0001065698 | |
| Document Period End Date | Jun. 30, 2024 | |
| C000052149 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Mid Cap Value Portfolio | |
| Class Name | Initial Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Mid Cap Value Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Initial Class $ 0.78 % | |
| Expenses Paid, Amount | $ 40 | |
| Expense Ratio, Percent | 0.78% | |
| Net Assets | $ 509,405,436 | |
| Holdings Count | Holding | 146 | |
| Investment Company Portfolio Turnover | 13% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 509,405,436 Portfolio Turnover (%): 13 Total Number of Holdings: 146 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Equities 98.1 % Money Market Funds 1.9 % GICS equity sectors Financials 18.3 % Industrials 18.2 % Materials 9.8 % Consumer Discretionary 9.5 % Health Care 7.7 % Utilities 7.5 % Information Technology 7.3 % Real Estate 6.9 % Energy 6.3 % Consumer Staples 5.9 % Communication Services 0.7 % Top ten holdings Hartford Financial Services Group, Inc. 1.6 % Diamondback Energy, Inc. 1.3 % PG&E Corp. 1.3 % Cencora, Inc. 1.2 % Targa Resources Corp. 1.2 % Raymond James Financial, Inc. 1.1 % Extra Space Storage, Inc., REIT 1.1 % Universal Health Services, Inc. 1.1 % M&T Bank Corp. 1.1 % LKQ Corp. 1.0 % MFS uses the Global Industry Classification Standard (GICS ® | |
| Largest Holdings [Text Block] | Top ten holdings Hartford Financial Services Group, Inc. 1.6 % Diamondback Energy, Inc. 1.3 % PG&E Corp. 1.3 % Cencora, Inc. 1.2 % Targa Resources Corp. 1.2 % Raymond James Financial, Inc. 1.1 % Extra Space Storage, Inc., REIT 1.1 % Universal Health Services, Inc. 1.1 % M&T Bank Corp. 1.1 % LKQ Corp. 1.0 % | |
| C000052150 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Mid Cap Value Portfolio | |
| Class Name | Service Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Mid Cap Value Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Service Class $ 1.03 % | |
| Expenses Paid, Amount | $ 53 | |
| Expense Ratio, Percent | 1.03% | |
| Net Assets | $ 509,405,436 | |
| Holdings Count | Holding | 146 | |
| Investment Company Portfolio Turnover | 13% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 509,405,436 Portfolio Turnover (%): 13 Total Number of Holdings: 146 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Equities 98.1 % Money Market Funds 1.9 % GICS equity sectors Financials 18.3 % Industrials 18.2 % Materials 9.8 % Consumer Discretionary 9.5 % Health Care 7.7 % Utilities 7.5 % Information Technology 7.3 % Real Estate 6.9 % Energy 6.3 % Consumer Staples 5.9 % Communication Services 0.7 % Top ten holdings Hartford Financial Services Group, Inc. 1.6 % Diamondback Energy, Inc. 1.3 % PG&E Corp. 1.3 % Cencora, Inc. 1.2 % Targa Resources Corp. 1.2 % Raymond James Financial, Inc. 1.1 % Extra Space Storage, Inc., REIT 1.1 % Universal Health Services, Inc. 1.1 % M&T Bank Corp. 1.1 % LKQ Corp. 1.0 % MFS uses the Global Industry Classification Standard (GICS ® | |
| Largest Holdings [Text Block] | Top ten holdings Hartford Financial Services Group, Inc. 1.6 % Diamondback Energy, Inc. 1.3 % PG&E Corp. 1.3 % Cencora, Inc. 1.2 % Targa Resources Corp. 1.2 % Raymond James Financial, Inc. 1.1 % Extra Space Storage, Inc., REIT 1.1 % Universal Health Services, Inc. 1.1 % M&T Bank Corp. 1.1 % LKQ Corp. 1.0 % | |
| C000021901 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Global Real Estate Portfolio | |
| Class Name | Initial Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Global Real Estate Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Initial Class $ 0.90 % | |
| Expenses Paid, Amount | $ 44 | |
| Expense Ratio, Percent | 0.90% | |
| Net Assets | $ 163,533,248 | |
| Holdings Count | Holding | 51 | |
| Investment Company Portfolio Turnover | 23% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 163,533,248 Portfolio Turnover (%): 23 Total Number of Holdings: 51 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Equities 99.1 % Money Market Funds 0.9 % Top ten holdings Prologis, Inc., REIT 8.7 % Equinix, Inc., REIT 5.9 % Goodman Group, REIT 5.1 % Extra Space Storage, Inc., REIT 4.5 % Mid-America Apartment Communities, Inc., REIT 3.9 % Digital Realty Trust, Inc., REIT 3.5 % Equity Lifestyle Properties, Inc., REIT 3.5 % Mitsui Fudosan Co. Ltd. 3.4 % Ventas, Inc., REIT 2.8 % Sun Communities, Inc., REIT 2.7 % Issuer country weightings United States 66.8 % United Kingdom 8.3 % Japan 7.5 % Australia 6.7 % Singapore 2.7 % Germany 2.0 % Canada 1.7 % Spain 1.2 % Hong Kong 1.2 % Other Countries 1.9 % | |
| Largest Holdings [Text Block] | Top ten holdings Prologis, Inc., REIT 8.7 % Equinix, Inc., REIT 5.9 % Goodman Group, REIT 5.1 % Extra Space Storage, Inc., REIT 4.5 % Mid-America Apartment Communities, Inc., REIT 3.9 % Digital Realty Trust, Inc., REIT 3.5 % Equity Lifestyle Properties, Inc., REIT 3.5 % Mitsui Fudosan Co. Ltd. 3.4 % Ventas, Inc., REIT 2.8 % Sun Communities, Inc., REIT 2.7 % | |
| C000021902 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Global Real Estate Portfolio | |
| Class Name | Service Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Global Real Estate Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Service Class $ 1.15 % | |
| Expenses Paid, Amount | $ 56 | |
| Expense Ratio, Percent | 1.15% | |
| Net Assets | $ 163,533,248 | |
| Holdings Count | Holding | 51 | |
| Investment Company Portfolio Turnover | 23% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 163,533,248 Portfolio Turnover (%): 23 Total Number of Holdings: 51 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Equities 99.1 % Money Market Funds 0.9 % Top ten holdings Prologis, Inc., REIT 8.7 % Equinix, Inc., REIT 5.9 % Goodman Group, REIT 5.1 % Extra Space Storage, Inc., REIT 4.5 % Mid-America Apartment Communities, Inc., REIT 3.9 % Digital Realty Trust, Inc., REIT 3.5 % Equity Lifestyle Properties, Inc., REIT 3.5 % Mitsui Fudosan Co. Ltd. 3.4 % Ventas, Inc., REIT 2.8 % Sun Communities, Inc., REIT 2.7 % Issuer country weightings United States 66.8 % United Kingdom 8.3 % Japan 7.5 % Australia 6.7 % Singapore 2.7 % Germany 2.0 % Canada 1.7 % Spain 1.2 % Hong Kong 1.2 % Other Countries 1.9 % | |
| Largest Holdings [Text Block] | Top ten holdings Prologis, Inc., REIT 8.7 % Equinix, Inc., REIT 5.9 % Goodman Group, REIT 5.1 % Extra Space Storage, Inc., REIT 4.5 % Mid-America Apartment Communities, Inc., REIT 3.9 % Digital Realty Trust, Inc., REIT 3.5 % Equity Lifestyle Properties, Inc., REIT 3.5 % Mitsui Fudosan Co. Ltd. 3.4 % Ventas, Inc., REIT 2.8 % Sun Communities, Inc., REIT 2.7 % | |
| C000052151 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Limited Maturity Portfolio | |
| Class Name | Initial Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Limited Maturity Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Initial Class $ 0.47 % | |
| Expenses Paid, Amount | $ 24 | |
| Expense Ratio, Percent | 0.47% | |
| Net Assets | $ 297,173,578 | |
| Holdings Count | Holding | 298 | |
| Investment Company Portfolio Turnover | 17% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 297,173,578 Average Effective Maturity (yrs): 2.2 Total Number of Holdings: 298 Average Effective Duration (yrs): 2.1 Portfolio Turnover (%): 17 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Fixed Income 98.2 % Money Market Funds 1.8 % Composition including fixed income credit quality AAA 10.0 % AA 9.2 % A 22.6 % BBB 29.6 % BB 0.2 % U.S. Government 25.5 % Federal Agencies 1.1 % Money Market Funds 1.8 % Ratings are assigned using Moody’s, Fitch, and Standard & Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&P and Fitch scale (e.g., AAA). All ratings are subject to change. | |
| Credit Ratings Selection [Text Block] | Ratings are assigned using Moody’s, Fitch, and Standard & Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&P and Fitch scale (e.g., AAA). All ratings are subject to change. | |
| C000052152 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Limited Maturity Portfolio | |
| Class Name | Service Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Limited Maturity Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Service Class $ 0.72 % | |
| Expenses Paid, Amount | $ 36 | |
| Expense Ratio, Percent | 0.72% | |
| Net Assets | $ 297,173,578 | |
| Holdings Count | Holding | 298 | |
| Investment Company Portfolio Turnover | 17% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 297,173,578 Average Effective Maturity (yrs): 2.2 Total Number of Holdings: 298 Average Effective Duration (yrs): 2.1 Portfolio Turnover (%): 17 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Fixed Income 98.2 % Money Market Funds 1.8 % Composition including fixed income credit quality AAA 10.0 % AA 9.2 % A 22.6 % BBB 29.6 % BB 0.2 % U.S. Government 25.5 % Federal Agencies 1.1 % Money Market Funds 1.8 % Ratings are assigned using Moody’s, Fitch, and Standard & Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&P and Fitch scale (e.g., AAA). All ratings are subject to change. | |
| Credit Ratings Selection [Text Block] | Ratings are assigned using Moody’s, Fitch, and Standard & Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&P and Fitch scale (e.g., AAA). All ratings are subject to change. | |
| C000068444 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Growth Allocation Portfolio | |
| Class Name | Initial Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Growth Allocation Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment ~ Initial Class $ 0.04 % ˜ Expenses are direct expenses and do not include underlying fund fees and expenses. | |
| Expenses Paid, Amount | $ 2 | [1] |
| Expense Ratio, Percent | 0.04% | [1] |
| Net Assets | $ 291,556,289 | |
| Holdings Count | Holding | 18 | |
| Investment Company Portfolio Turnover | 4% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 291,556,289 Portfolio Turnover (%): 4 Total Number of Holdings: 18 | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio allocation Portfolio holdings MFS Value Series 11.0 % MFS Growth Series 10.2 % MFS Research International Portfolio 10.0 % MFS Research Series 9.3 % MFS Mid Cap Growth Series 9.0 % MFS Mid Cap Value Portfolio 9.0 % MFS Global Real Estate Portfolio 5.0 % MFS High Yield Portfolio 5.0 % MFS International Growth Portfolio 5.0 % MFS International Intrinsic Value Portfolio 5.0 % MFS Inflation-Adjusted Bond Portfolio 4.9 % MFS Total Return Bond Series 4.3 % MFS Global Governments Portfolio 4.0 % MFS Institutional Money Market Portfolio 2.3 % MFS New Discovery Series 2.0 % MFS New Discovery Value Portfolio 2.0 % MFS Emerging Markets Equity Portfolio 1.0 % MFS Limited Maturity Portfolio 1.0 % | |
| C000068445 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Growth Allocation Portfolio | |
| Class Name | Service Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Growth Allocation Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment ~ Service Class $ 0.29 % ˜ Expenses are direct expenses and do not include underlying fund fees and expenses. | |
| Expenses Paid, Amount | $ 15 | [2] |
| Expense Ratio, Percent | 0.29% | [2] |
| Net Assets | $ 291,556,289 | |
| Holdings Count | Holding | 18 | |
| Investment Company Portfolio Turnover | 4% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 291,556,289 Portfolio Turnover (%): 4 Total Number of Holdings: 18 | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio allocation Portfolio holdings MFS Value Series 11.0 % MFS Growth Series 10.2 % MFS Research International Portfolio 10.0 % MFS Research Series 9.3 % MFS Mid Cap Growth Series 9.0 % MFS Mid Cap Value Portfolio 9.0 % MFS Global Real Estate Portfolio 5.0 % MFS High Yield Portfolio 5.0 % MFS International Growth Portfolio 5.0 % MFS International Intrinsic Value Portfolio 5.0 % MFS Inflation-Adjusted Bond Portfolio 4.9 % MFS Total Return Bond Series 4.3 % MFS Global Governments Portfolio 4.0 % MFS Institutional Money Market Portfolio 2.3 % MFS New Discovery Series 2.0 % MFS New Discovery Value Portfolio 2.0 % MFS Emerging Markets Equity Portfolio 1.0 % MFS Limited Maturity Portfolio 1.0 % | |
| C000068442 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® ModerateAllocation Portfolio | |
| Class Name | Initial Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Moderate Allocation Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment ~ Initial Class $ 0.02 % ˜ Expenses are direct expenses and do not include underlying fund fees and expenses. | |
| Expenses Paid, Amount | $ 1 | [3] |
| Expense Ratio, Percent | 0.02% | [3] |
| Net Assets | $ 949,440,776 | |
| Holdings Count | Holding | 18 | |
| Investment Company Portfolio Turnover | 0% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 949,440,776 Portfolio Turnover (%): 0 Total Number of Holdings: 18 | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio allocation Portfolio holdings MFS Total Return Bond Series 11.3 % MFS Government Securities Portfolio 9.3 % MFS Value Series 9.0 % MFS Growth Series 8.2 % MFS Research International Portfolio 7.9 % MFS Research Series 7.3 % MFS Mid Cap Growth Series 7.0 % MFS Mid Cap Value Portfolio 7.0 % MFS High Yield Portfolio 5.1 % MFS Global Governments Portfolio 5.0 % MFS Inflation-Adjusted Bond Portfolio 4.9 % MFS Global Real Estate Portfolio 3.0 % MFS Limited Maturity Portfolio 3.0 % MFS International Growth Portfolio 3.0 % MFS Institutional Money Market Portfolio 3.0 % MFS International Intrinsic Value Portfolio 3.0 % MFS New Discovery Series 1.5 % MFS New Discovery Value Portfolio 1.5 % | |
| C000068443 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® ModerateAllocation Portfolio | |
| Class Name | Service class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Moderate Allocation Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment ~ Service Class $ 0.27 % ˜ Expenses are direct expenses and do not include underlying fund fees and expenses. | |
| Expenses Paid, Amount | $ 14 | [4] |
| Expense Ratio, Percent | 0.27% | [4] |
| Net Assets | $ 949,440,776 | |
| Holdings Count | Holding | 18 | |
| Investment Company Portfolio Turnover | 0% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 949,440,776 Portfolio Turnover (%): 0 Total Number of Holdings: 18 | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio allocation Portfolio holdings MFS Total Return Bond Series 11.3 % MFS Government Securities Portfolio 9.3 % MFS Value Series 9.0 % MFS Growth Series 8.2 % MFS Research International Portfolio 7.9 % MFS Research Series 7.3 % MFS Mid Cap Growth Series 7.0 % MFS Mid Cap Value Portfolio 7.0 % MFS High Yield Portfolio 5.1 % MFS Global Governments Portfolio 5.0 % MFS Inflation-Adjusted Bond Portfolio 4.9 % MFS Global Real Estate Portfolio 3.0 % MFS Limited Maturity Portfolio 3.0 % MFS International Growth Portfolio 3.0 % MFS Institutional Money Market Portfolio 3.0 % MFS International Intrinsic Value Portfolio 3.0 % MFS New Discovery Series 1.5 % MFS New Discovery Value Portfolio 1.5 % | |
| C000068454 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Inflation-AdjustedBond Portfolio | |
| Class Name | Initial Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Inflation-Adjusted Bond Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Initial Class $ 0.58 % | |
| Expenses Paid, Amount | $ 28 | |
| Expense Ratio, Percent | 0.58% | |
| Net Assets | $ 165,495,769 | |
| Holdings Count | Holding | 85 | |
| Investment Company Portfolio Turnover | 27% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 165,495,769 Average Effective Maturity (yrs): 10.6 Total Number of Holdings: 85 Average Effective Duration (yrs): 9.6 Portfolio Turnover (%): 27 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Fixed Income 97.4 % Money Market Funds 2.6 % Issuer country weightings United States 51.2 % United Kingdom 20.5 % Italy 10.1 % Spain 6.5 % Canada 4.6 % Japan 2.6 % Australia 1.5 % France 1.4 % Germany 0.9 % Other Countries 0.7 % Composition including fixed income credit quality AAA 9.1 % AA 22.3 % A 4.5 % BBB 15.3 % U.S. Government 45.3 % Federal Agencies 0.9 % Money Market Funds 2.6 % Ratings are assigned using Moody’s, Fitch, and Standard & Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&P and Fitch scale (e.g., AAA). All ratings are subject to change. | |
| Credit Ratings Selection [Text Block] | Ratings are assigned using Moody’s, Fitch, and Standard & Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&P and Fitch scale (e.g., AAA). All ratings are subject to change. | |
| C000068455 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Inflation-AdjustedBond Portfolio | |
| Class Name | Service Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Inflation-Adjusted Bond Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Service Class $ 0.83 % | |
| Expenses Paid, Amount | $ 41 | |
| Expense Ratio, Percent | 0.83% | |
| Net Assets | $ 165,495,769 | |
| Holdings Count | Holding | 85 | |
| Investment Company Portfolio Turnover | 27% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 165,495,769 Average Effective Maturity (yrs): 10.6 Total Number of Holdings: 85 Average Effective Duration (yrs): 9.6 Portfolio Turnover (%): 27 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Fixed Income 97.4 % Money Market Funds 2.6 % Issuer country weightings United States 51.2 % United Kingdom 20.5 % Italy 10.1 % Spain 6.5 % Canada 4.6 % Japan 2.6 % Australia 1.5 % France 1.4 % Germany 0.9 % Other Countries 0.7 % Composition including fixed income credit quality AAA 9.1 % AA 22.3 % A 4.5 % BBB 15.3 % U.S. Government 45.3 % Federal Agencies 0.9 % Money Market Funds 2.6 % Ratings are assigned using Moody’s, Fitch, and Standard & Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&P and Fitch scale (e.g., AAA). All ratings are subject to change. | |
| Credit Ratings Selection [Text Block] | Ratings are assigned using Moody’s, Fitch, and Standard & Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&P and Fitch scale (e.g., AAA). All ratings are subject to change. | |
| C000021905 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Blended Research®Small Cap Equity Portfolio | |
| Class Name | Initial Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Blended Research Small Cap Equity Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Initial Class $ 0.54 % | |
| Expenses Paid, Amount | $ 27 | |
| Expense Ratio, Percent | 0.54% | |
| Net Assets | $ 81,406,178 | |
| Holdings Count | Holding | 179 | |
| Investment Company Portfolio Turnover | 35% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 81,406,178 Portfolio Turnover (%): 35 Total Number of Holdings: 179 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Equities 99.0 % Money Market Funds 1.0 % GICS equity sectors Health Care 16.0 % Financials 15.8 % Industrials 15.6 % Information Technology 15.1 % Consumer Discretionary 11.6 % Energy 6.9 % Real Estate 6.7 % Materials 4.8 % Communication Services 2.8 % Consumer Staples 2.4 % Utilities 1.3 % Top ten holdings e.l.f. Beauty, Inc. 1.8 % Grand Canyon Education, Inc. 1.6 % APi Group, Inc. 1.6 % Prestige Consumer Healthcare, Inc. 1.6 % Verint Systems, Inc. 1.6 % Axcelis Technologies, Inc. 1.5 % Encompass Health Corp. 1.5 % Element Solutions, Inc. 1.5 % Organon & Co. 1.5 % Skechers USA, Inc., "A" 1.5 % MFS uses the Global Industry Classification Standard (GICS ® | |
| Largest Holdings [Text Block] | Top ten holdings e.l.f. Beauty, Inc. 1.8 % Grand Canyon Education, Inc. 1.6 % APi Group, Inc. 1.6 % Prestige Consumer Healthcare, Inc. 1.6 % Verint Systems, Inc. 1.6 % Axcelis Technologies, Inc. 1.5 % Encompass Health Corp. 1.5 % Element Solutions, Inc. 1.5 % Organon & Co. 1.5 % Skechers USA, Inc., "A" 1.5 % | |
| C000021906 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® Blended Research®Small Cap Equity Portfolio | |
| Class Name | Service Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Blended Research Small Cap Equity Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Service Class $ 0.79 % | |
| Expenses Paid, Amount | $ 39 | |
| Expense Ratio, Percent | 0.79% | |
| Net Assets | $ 81,406,178 | |
| Holdings Count | Holding | 179 | |
| Investment Company Portfolio Turnover | 35% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 81,406,178 Portfolio Turnover (%): 35 Total Number of Holdings: 179 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Equities 99.0 % Money Market Funds 1.0 % GICS equity sectors Health Care 16.0 % Financials 15.8 % Industrials 15.6 % Information Technology 15.1 % Consumer Discretionary 11.6 % Energy 6.9 % Real Estate 6.7 % Materials 4.8 % Communication Services 2.8 % Consumer Staples 2.4 % Utilities 1.3 % Top ten holdings e.l.f. Beauty, Inc. 1.8 % Grand Canyon Education, Inc. 1.6 % APi Group, Inc. 1.6 % Prestige Consumer Healthcare, Inc. 1.6 % Verint Systems, Inc. 1.6 % Axcelis Technologies, Inc. 1.5 % Encompass Health Corp. 1.5 % Element Solutions, Inc. 1.5 % Organon & Co. 1.5 % Skechers USA, Inc., "A" 1.5 % MFS uses the Global Industry Classification Standard (GICS ® | |
| Largest Holdings [Text Block] | Top ten holdings e.l.f. Beauty, Inc. 1.8 % Grand Canyon Education, Inc. 1.6 % APi Group, Inc. 1.6 % Prestige Consumer Healthcare, Inc. 1.6 % Verint Systems, Inc. 1.6 % Axcelis Technologies, Inc. 1.5 % Encompass Health Corp. 1.5 % Element Solutions, Inc. 1.5 % Organon & Co. 1.5 % Skechers USA, Inc., "A" 1.5 % | |
| C000068440 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® ConservativeAllocation Portfolio | |
| Class Name | Initial Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Conservative Allocation Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment ~ Initial Class $ 0.04 % ˜ Expenses are direct expenses and do not include underlying fund fees and expenses. | |
| Expenses Paid, Amount | $ 2 | [5] |
| Expense Ratio, Percent | 0.04% | [5] |
| Net Assets | $ 265,879,798 | |
| Holdings Count | Holding | 18 | |
| Investment Company Portfolio Turnover | 1% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 265,879,798 Portfolio Turnover (%): 1 Total Number of Holdings: 18 | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio allocation Portfolio holdings MFS Total Return Bond Series 15.3 % MFS Limited Maturity Portfolio 11.1 % MFS Inflation-Adjusted Bond Portfolio 9.9 % MFS Government Securities Portfolio 9.3 % MFS Global Governments Portfolio 8.0 % MFS Research Series 6.3 % MFS Value Series 6.0 % MFS Growth Series 5.2 % MFS High Yield Portfolio 5.0 % MFS Research International Portfolio 4.9 % MFS Mid Cap Growth Series 4.0 % MFS Mid Cap Value Portfolio 4.0 % MFS Institutional Money Market Portfolio 3.0 % MFS Global Real Estate Portfolio 2.0 % MFS International Growth Portfolio 2.0 % MFS International Intrinsic Value Portfolio 2.0 % MFS New Discovery Series 1.0 % MFS New Discovery Value Portfolio 1.0 % | |
| C000068441 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® ConservativeAllocation Portfolio | |
| Class Name | Service Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS Conservative Allocation Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment ~ Service Class $ 0.29 % ˜ Expenses are direct expenses and do not include underlying fund fees and expenses. | |
| Expenses Paid, Amount | $ 15 | [6] |
| Expense Ratio, Percent | 0.29% | [6] |
| Net Assets | $ 265,879,798 | |
| Holdings Count | Holding | 18 | |
| Investment Company Portfolio Turnover | 1% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 265,879,798 Portfolio Turnover (%): 1 Total Number of Holdings: 18 | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio allocation Portfolio holdings MFS Total Return Bond Series 15.3 % MFS Limited Maturity Portfolio 11.1 % MFS Inflation-Adjusted Bond Portfolio 9.9 % MFS Government Securities Portfolio 9.3 % MFS Global Governments Portfolio 8.0 % MFS Research Series 6.3 % MFS Value Series 6.0 % MFS Growth Series 5.2 % MFS High Yield Portfolio 5.0 % MFS Research International Portfolio 4.9 % MFS Mid Cap Growth Series 4.0 % MFS Mid Cap Value Portfolio 4.0 % MFS Institutional Money Market Portfolio 3.0 % MFS Global Real Estate Portfolio 2.0 % MFS International Growth Portfolio 2.0 % MFS International Intrinsic Value Portfolio 2.0 % MFS New Discovery Series 1.0 % MFS New Discovery Value Portfolio 1.0 % | |
| C000068446 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® New DiscoveryValue Portfolio | |
| Class Name | Initial Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS New Discovery Value Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Initial Class $ 0.88 % | |
| Expenses Paid, Amount | $ 44 | |
| Expense Ratio, Percent | 0.88% | |
| Net Assets | $ 48,652,485 | |
| Holdings Count | Holding | 127 | |
| Investment Company Portfolio Turnover | 19% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 48,652,485 Portfolio Turnover (%): 19 Total Number of Holdings: 127 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Equities 97.4 % Money Market Funds 2.6 % GICS equity sectors Financials 20.6 % Industrials 17.9 % Consumer Discretionary 12.1 % Materials 10.1 % Real Estate 8.7 % Energy 7.9 % Information Technology 7.2 % Utilities 5.5 % Health Care 5.3 % Consumer Staples 2.1 % Top ten holdings ACI Worldwide, Inc. 1.6 % Portland General Electric Co. 1.4 % Air Lease Corp. 1.3 % NorthWestern Corp. 1.3 % Element Solutions, Inc. 1.3 % Permian Resources Corp. 1.2 % Prosperity Bancshares, Inc. 1.2 % LKQ Corp. 1.2 % National Storage Affiliates Trust, REIT 1.2 % Plains GP Holdings LP 1.2 % MFS uses the Global Industry Classification Standard (GICS ® | |
| Largest Holdings [Text Block] | Top ten holdings ACI Worldwide, Inc. 1.6 % Portland General Electric Co. 1.4 % Air Lease Corp. 1.3 % NorthWestern Corp. 1.3 % Element Solutions, Inc. 1.3 % Permian Resources Corp. 1.2 % Prosperity Bancshares, Inc. 1.2 % LKQ Corp. 1.2 % National Storage Affiliates Trust, REIT 1.2 % Plains GP Holdings LP 1.2 % | |
| C000068447 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | MFS® New DiscoveryValue Portfolio | |
| Class Name | Service Class | |
| No Trading Symbol Flag | true | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about MFS New Discovery Value Portfolio 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 insurancefunds.mfs.com | |
| Additional Information Phone Number | 1‑800‑225‑2606 | |
| Additional Information Email | orderliterature@mfs.com | |
| Additional Information Website | insurancefunds.mfs.com | |
| Expenses [Text Block] | FUND EXPENSES What were the fund costs for the last six months? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Service Class $ 1.13 % | |
| Expenses Paid, Amount | $ 56 | |
| Expense Ratio, Percent | 1.13% | |
| Net Assets | $ 48,652,485 | |
| Holdings Count | Holding | 127 | |
| Investment Company Portfolio Turnover | 19% | |
| Additional Fund Statistics [Text Block] | FUND STATISTICS AS OF 6/30/24 Net Assets ($): 48,652,485 Portfolio Turnover (%): 19 Total Number of Holdings: 127 Where the fund holds derivatives, they are not included in the total number of portfolio holdings. | |
| Holdings [Text Block] | PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 6/30/24) Portfolio structure Equities 97.4 % Money Market Funds 2.6 % GICS equity sectors Financials 20.6 % Industrials 17.9 % Consumer Discretionary 12.1 % Materials 10.1 % Real Estate 8.7 % Energy 7.9 % Information Technology 7.2 % Utilities 5.5 % Health Care 5.3 % Consumer Staples 2.1 % Top ten holdings ACI Worldwide, Inc. 1.6 % Portland General Electric Co. 1.4 % Air Lease Corp. 1.3 % NorthWestern Corp. 1.3 % Element Solutions, Inc. 1.3 % Permian Resources Corp. 1.2 % Prosperity Bancshares, Inc. 1.2 % LKQ Corp. 1.2 % National Storage Affiliates Trust, REIT 1.2 % Plains GP Holdings LP 1.2 % MFS uses the Global Industry Classification Standard (GICS ® | |
| Largest Holdings [Text Block] | Top ten holdings ACI Worldwide, Inc. 1.6 % Portland General Electric Co. 1.4 % Air Lease Corp. 1.3 % NorthWestern Corp. 1.3 % Element Solutions, Inc. 1.3 % Permian Resources Corp. 1.2 % Prosperity Bancshares, Inc. 1.2 % LKQ Corp. 1.2 % National Storage Affiliates Trust, REIT 1.2 % Plains GP Holdings LP 1.2 % | |
| [1]Expenses are direct expenses and do not include underlying fund fees and expenses.[2]Expenses are direct expenses and do not include underlying fund fees and expenses.[3]Expenses are direct expenses and do not include underlying fund fees and expenses.[4]Expenses are direct expenses and do not include underlying fund fees and expenses.[5]Expenses are direct expenses and do not include underlying fund fees and expenses.[6]Expenses are direct expenses and do not include underlying fund fees and expenses. | ||
| Shareholder Report, Holdings (Details) | Jun. 30, 2024 |
| C000052149 [Member] | Hartford Financial Services Group Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000052149 [Member] | Diamondback Energy Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000052149 [Member] | PG And E Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000052149 [Member] | Cencora Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000052149 [Member] | Targa Resources Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000052149 [Member] | Raymond James Financial Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000052149 [Member] | Extra Space Storage Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000052149 [Member] | Universal Health Services Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000052149 [Member] | M And T Bank Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000052149 [Member] | LKQ Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000052149 [Member] | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.30% |
| C000052149 [Member] | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.70% |
| C000052149 [Member] | Real Estate Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.90% |
| C000052149 [Member] | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.70% |
| C000052149 [Member] | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.50% |
| C000052149 [Member] | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.90% |
| C000052149 [Member] | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.20% |
| C000052149 [Member] | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| C000052149 [Member] | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.80% |
| C000052149 [Member] | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.50% |
| C000052149 [Member] | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.30% |
| C000052149 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 98.10% |
| C000052149 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| C000052150 [Member] | Hartford Financial Services Group Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000052150 [Member] | Diamondback Energy Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000052150 [Member] | PG And E Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000052150 [Member] | Cencora Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000052150 [Member] | Targa Resources Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000052150 [Member] | Raymond James Financial Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000052150 [Member] | Extra Space Storage Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000052150 [Member] | Universal Health Services Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000052150 [Member] | M And T Bank Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000052150 [Member] | LKQ Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000052150 [Member] | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.30% |
| C000052150 [Member] | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.70% |
| C000052150 [Member] | Real Estate Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.90% |
| C000052150 [Member] | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.70% |
| C000052150 [Member] | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.50% |
| C000052150 [Member] | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.90% |
| C000052150 [Member] | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.20% |
| C000052150 [Member] | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| C000052150 [Member] | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.80% |
| C000052150 [Member] | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.50% |
| C000052150 [Member] | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 18.30% |
| C000052150 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 98.10% |
| C000052150 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| C000021901 [Member] | Extra Space Storage Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.50% |
| C000021901 [Member] | Prologis Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.70% |
| C000021901 [Member] | Equinix Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.90% |
| C000021901 [Member] | Goodman Group REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.10% |
| C000021901 [Member] | Mid America Apartment Communities Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.90% |
| C000021901 [Member] | Digital Realty Trust Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000021901 [Member] | Equity Lifestyle Properties Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000021901 [Member] | Mitsui Fudosan Co Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.40% |
| C000021901 [Member] | Ventas Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.80% |
| C000021901 [Member] | Sun Communities Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.70% |
| C000021901 [Member] | Other Countries [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| C000021901 [Member] | AUSTRALIA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.70% |
| C000021901 [Member] | CANADA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.70% |
| C000021901 [Member] | GERMANY | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000021901 [Member] | SPAIN | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000021901 [Member] | UNITED KINGDOM | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.30% |
| C000021901 [Member] | HONG KONG | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000021901 [Member] | JAPAN | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.50% |
| C000021901 [Member] | SINGAPORE | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.70% |
| C000021901 [Member] | UNITED STATES | |
| Holdings [Line Items] | |
| Percent of Total Investments | 66.80% |
| C000021901 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 99.10% |
| C000021901 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.90% |
| C000021902 [Member] | Extra Space Storage Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.50% |
| C000021902 [Member] | Prologis Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.70% |
| C000021902 [Member] | Equinix Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.90% |
| C000021902 [Member] | Goodman Group REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.10% |
| C000021902 [Member] | Mid America Apartment Communities Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.90% |
| C000021902 [Member] | Digital Realty Trust Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000021902 [Member] | Equity Lifestyle Properties Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.50% |
| C000021902 [Member] | Mitsui Fudosan Co Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3.40% |
| C000021902 [Member] | Ventas Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.80% |
| C000021902 [Member] | Sun Communities Inc REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.70% |
| C000021902 [Member] | Other Countries [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.90% |
| C000021902 [Member] | AUSTRALIA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.70% |
| C000021902 [Member] | CANADA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.70% |
| C000021902 [Member] | GERMANY | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000021902 [Member] | SPAIN | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000021902 [Member] | UNITED KINGDOM | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.30% |
| C000021902 [Member] | HONG KONG | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000021902 [Member] | JAPAN | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.50% |
| C000021902 [Member] | SINGAPORE | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.70% |
| C000021902 [Member] | UNITED STATES | |
| Holdings [Line Items] | |
| Percent of Total Investments | 66.80% |
| C000021902 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 99.10% |
| C000021902 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.90% |
| C000052151 [Member] | Money Market Funds Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.80% |
| C000052151 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.80% |
| C000052151 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 98.20% |
| C000052151 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 25.50% |
| C000052151 [Member] | Federal Agencies [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000052152 [Member] | Money Market Funds Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.80% |
| C000052152 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.80% |
| C000052152 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 98.20% |
| C000052152 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 25.50% |
| C000052152 [Member] | Federal Agencies [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.10% |
| C000068444 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.30% |
| C000068444 [Member] | U S Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 52.50% |
| C000068444 [Member] | International Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21% |
| C000068444 [Member] | Bond Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 19.20% |
| C000068444 [Member] | Non Traditional Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068444 [Member] | MFS Value Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11% |
| C000068444 [Member] | MFS Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.20% |
| C000068444 [Member] | MFS Research International Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10% |
| C000068444 [Member] | MFS Research Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000068444 [Member] | MFS Mid Cap Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000068444 [Member] | MFS Mid Cap Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000068444 [Member] | MFS Global Real Estate Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068444 [Member] | MFS High Yield Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068444 [Member] | MFS International Growth Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068444 [Member] | MFS International Intrinsic Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068444 [Member] | MFS Inflation Adjusted Bond Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
| C000068444 [Member] | MFS Total Return Bond Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000068444 [Member] | MFS Global Governments Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4% |
| C000068444 [Member] | MFS Institutional Money Market Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.30% |
| C000068444 [Member] | MFS New Discovery Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068444 [Member] | MFS New Discovery Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068444 [Member] | MFS Emerging Markets Equity Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000068444 [Member] | MFS Limited Maturity Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000068445 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.30% |
| C000068445 [Member] | U S Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 52.50% |
| C000068445 [Member] | International Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 21% |
| C000068445 [Member] | Bond Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 19.20% |
| C000068445 [Member] | Non Traditional Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068445 [Member] | MFS Value Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11% |
| C000068445 [Member] | MFS Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.20% |
| C000068445 [Member] | MFS Research International Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10% |
| C000068445 [Member] | MFS Research Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000068445 [Member] | MFS Mid Cap Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000068445 [Member] | MFS Mid Cap Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000068445 [Member] | MFS Global Real Estate Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068445 [Member] | MFS High Yield Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068445 [Member] | MFS International Growth Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068445 [Member] | MFS International Intrinsic Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068445 [Member] | MFS Inflation Adjusted Bond Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
| C000068445 [Member] | MFS Total Return Bond Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.30% |
| C000068445 [Member] | MFS Global Governments Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4% |
| C000068445 [Member] | MFS Institutional Money Market Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.30% |
| C000068445 [Member] | MFS New Discovery Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068445 [Member] | MFS New Discovery Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068445 [Member] | MFS Emerging Markets Equity Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000068445 [Member] | MFS Limited Maturity Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000068442 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068442 [Member] | U S Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 41.50% |
| C000068442 [Member] | International Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 13.90% |
| C000068442 [Member] | Bond Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 38.60% |
| C000068442 [Member] | Non Traditional Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068442 [Member] | MFS Value Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000068442 [Member] | MFS Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.20% |
| C000068442 [Member] | MFS Research International Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.90% |
| C000068442 [Member] | MFS Research Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| C000068442 [Member] | MFS Mid Cap Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7% |
| C000068442 [Member] | MFS Mid Cap Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7% |
| C000068442 [Member] | MFS Global Real Estate Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068442 [Member] | MFS High Yield Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.10% |
| C000068442 [Member] | MFS International Growth Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068442 [Member] | MFS International Intrinsic Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068442 [Member] | MFS Inflation Adjusted Bond Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
| C000068442 [Member] | MFS Total Return Bond Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.30% |
| C000068442 [Member] | MFS Global Governments Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068442 [Member] | MFS Institutional Money Market Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068442 [Member] | MFS New Discovery Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000068442 [Member] | MFS New Discovery Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000068442 [Member] | MFS Limited Maturity Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068442 [Member] | MFS Government Securities Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000068443 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068443 [Member] | U S Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 41.50% |
| C000068443 [Member] | International Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 13.90% |
| C000068443 [Member] | Bond Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 38.60% |
| C000068443 [Member] | Non Traditional Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068443 [Member] | MFS Value Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9% |
| C000068443 [Member] | MFS Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.20% |
| C000068443 [Member] | MFS Research International Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.90% |
| C000068443 [Member] | MFS Research Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.30% |
| C000068443 [Member] | MFS Mid Cap Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7% |
| C000068443 [Member] | MFS Mid Cap Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7% |
| C000068443 [Member] | MFS Global Real Estate Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068443 [Member] | MFS High Yield Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.10% |
| C000068443 [Member] | MFS International Growth Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068443 [Member] | MFS International Intrinsic Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068443 [Member] | MFS Inflation Adjusted Bond Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
| C000068443 [Member] | MFS Total Return Bond Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.30% |
| C000068443 [Member] | MFS Global Governments Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068443 [Member] | MFS Institutional Money Market Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068443 [Member] | MFS New Discovery Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000068443 [Member] | MFS New Discovery Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000068443 [Member] | MFS Limited Maturity Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068443 [Member] | MFS Government Securities Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000068454 [Member] | Other Countries [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.70% |
| C000068454 [Member] | Money Market Funds Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000068454 [Member] | AUSTRALIA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000068454 [Member] | CANADA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.60% |
| C000068454 [Member] | GERMANY | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.90% |
| C000068454 [Member] | SPAIN | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.50% |
| C000068454 [Member] | UNITED KINGDOM | |
| Holdings [Line Items] | |
| Percent of Total Investments | 20.50% |
| C000068454 [Member] | JAPAN | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000068454 [Member] | UNITED STATES | |
| Holdings [Line Items] | |
| Percent of Total Investments | 51.20% |
| C000068454 [Member] | FRANCE | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.40% |
| C000068454 [Member] | ITALY | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.10% |
| C000068454 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000068454 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 97.40% |
| C000068454 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 45.30% |
| C000068454 [Member] | Federal Agencies [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.90% |
| C000068455 [Member] | Other Countries [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.70% |
| C000068455 [Member] | Money Market Funds Quality [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000068455 [Member] | AUSTRALIA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000068455 [Member] | CANADA | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.60% |
| C000068455 [Member] | GERMANY | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.90% |
| C000068455 [Member] | SPAIN | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.50% |
| C000068455 [Member] | UNITED KINGDOM | |
| Holdings [Line Items] | |
| Percent of Total Investments | 20.50% |
| C000068455 [Member] | JAPAN | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000068455 [Member] | UNITED STATES | |
| Holdings [Line Items] | |
| Percent of Total Investments | 51.20% |
| C000068455 [Member] | FRANCE | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.40% |
| C000068455 [Member] | ITALY | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.10% |
| C000068455 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000068455 [Member] | Fixed Income Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 97.40% |
| C000068455 [Member] | US Government Debt Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 45.30% |
| C000068455 [Member] | Federal Agencies [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 0.90% |
| C000021905 [Member] | e l f Beauty Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.80% |
| C000021905 [Member] | Grand Canyon Education Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000021905 [Member] | APi Group Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000021905 [Member] | Prestige Consumer Healthcare Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000021905 [Member] | Verint Systems Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000021905 [Member] | Axcelis Technologies Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000021905 [Member] | Encompass Health Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000021905 [Member] | Element Solutions Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000021905 [Member] | Organon And Co [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000021905 [Member] | Skechers USA Inc A [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000021905 [Member] | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.90% |
| C000021905 [Member] | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 16% |
| C000021905 [Member] | Real Estate Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.70% |
| C000021905 [Member] | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.80% |
| C000021905 [Member] | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.60% |
| C000021905 [Member] | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.40% |
| C000021905 [Member] | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.60% |
| C000021905 [Member] | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.10% |
| C000021905 [Member] | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| C000021905 [Member] | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000021905 [Member] | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.80% |
| C000021905 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 99% |
| C000021905 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000021906 [Member] | e l f Beauty Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.80% |
| C000021906 [Member] | Grand Canyon Education Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000021906 [Member] | APi Group Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000021906 [Member] | Prestige Consumer Healthcare Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000021906 [Member] | Verint Systems Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000021906 [Member] | Axcelis Technologies Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000021906 [Member] | Encompass Health Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000021906 [Member] | Element Solutions Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000021906 [Member] | Organon And Co [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000021906 [Member] | Skechers USA Inc A [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.50% |
| C000021906 [Member] | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.90% |
| C000021906 [Member] | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 16% |
| C000021906 [Member] | Real Estate Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.70% |
| C000021906 [Member] | Communications Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.80% |
| C000021906 [Member] | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.60% |
| C000021906 [Member] | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.40% |
| C000021906 [Member] | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.60% |
| C000021906 [Member] | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.10% |
| C000021906 [Member] | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.80% |
| C000021906 [Member] | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000021906 [Member] | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.80% |
| C000021906 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 99% |
| C000021906 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000068440 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068440 [Member] | U S Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 27.50% |
| C000068440 [Member] | International Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.90% |
| C000068440 [Member] | Bond Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 58.60% |
| C000068440 [Member] | Non Traditional Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068440 [Member] | MFS Value Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6% |
| C000068440 [Member] | MFS Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.20% |
| C000068440 [Member] | MFS Research International Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
| C000068440 [Member] | MFS Research Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.30% |
| C000068440 [Member] | MFS Mid Cap Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4% |
| C000068440 [Member] | MFS Mid Cap Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4% |
| C000068440 [Member] | MFS Global Real Estate Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068440 [Member] | MFS High Yield Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068440 [Member] | MFS International Growth Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068440 [Member] | MFS International Intrinsic Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068440 [Member] | MFS Inflation Adjusted Bond Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.90% |
| C000068440 [Member] | MFS Total Return Bond Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.30% |
| C000068440 [Member] | MFS Global Governments Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8% |
| C000068440 [Member] | MFS Institutional Money Market Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068440 [Member] | MFS New Discovery Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000068440 [Member] | MFS New Discovery Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000068440 [Member] | MFS Limited Maturity Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.10% |
| C000068440 [Member] | MFS Government Securities Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000068441 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068441 [Member] | U S Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 27.50% |
| C000068441 [Member] | International Stock Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.90% |
| C000068441 [Member] | Bond Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 58.60% |
| C000068441 [Member] | Non Traditional Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068441 [Member] | MFS Value Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6% |
| C000068441 [Member] | MFS Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.20% |
| C000068441 [Member] | MFS Research International Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
| C000068441 [Member] | MFS Research Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 6.30% |
| C000068441 [Member] | MFS Mid Cap Growth Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4% |
| C000068441 [Member] | MFS Mid Cap Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4% |
| C000068441 [Member] | MFS Global Real Estate Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068441 [Member] | MFS High Yield Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5% |
| C000068441 [Member] | MFS International Growth Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068441 [Member] | MFS International Intrinsic Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2% |
| C000068441 [Member] | MFS Inflation Adjusted Bond Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.90% |
| C000068441 [Member] | MFS Total Return Bond Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 15.30% |
| C000068441 [Member] | MFS Global Governments Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8% |
| C000068441 [Member] | MFS Institutional Money Market Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 3% |
| C000068441 [Member] | MFS New Discovery Series [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000068441 [Member] | MFS New Discovery Value Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1% |
| C000068441 [Member] | MFS Limited Maturity Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 11.10% |
| C000068441 [Member] | MFS Government Securities Portfolio [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 9.30% |
| C000068446 [Member] | LKQ Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000068446 [Member] | Element Solutions Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000068446 [Member] | ACI Worldwide Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000068446 [Member] | Portland General Electric Co [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.40% |
| C000068446 [Member] | Air Lease Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000068446 [Member] | NorthWestern Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000068446 [Member] | Permian Resources Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000068446 [Member] | Prosperity Bancshares Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000068446 [Member] | National Storage Affiliates Trust REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000068446 [Member] | Plains GP Holdings LP [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000068446 [Member] | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.90% |
| C000068446 [Member] | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| C000068446 [Member] | Real Estate Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.70% |
| C000068446 [Member] | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.10% |
| C000068446 [Member] | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.10% |
| C000068446 [Member] | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.90% |
| C000068446 [Member] | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.20% |
| C000068446 [Member] | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.10% |
| C000068446 [Member] | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| C000068446 [Member] | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 20.60% |
| C000068446 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 97.40% |
| C000068446 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| C000068447 [Member] | LKQ Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000068447 [Member] | Element Solutions Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000068447 [Member] | ACI Worldwide Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.60% |
| C000068447 [Member] | Portland General Electric Co [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.40% |
| C000068447 [Member] | Air Lease Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000068447 [Member] | NorthWestern Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.30% |
| C000068447 [Member] | Permian Resources Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000068447 [Member] | Prosperity Bancshares Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000068447 [Member] | National Storage Affiliates Trust REIT [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000068447 [Member] | Plains GP Holdings LP [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 1.20% |
| C000068447 [Member] | Energy Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.90% |
| C000068447 [Member] | Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.30% |
| C000068447 [Member] | Real Estate Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 8.70% |
| C000068447 [Member] | Consumer Discretionary Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 12.10% |
| C000068447 [Member] | Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.10% |
| C000068447 [Member] | Industrial Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 17.90% |
| C000068447 [Member] | Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 7.20% |
| C000068447 [Member] | Materials Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 10.10% |
| C000068447 [Member] | Utilities Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 5.50% |
| C000068447 [Member] | Financials [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 20.60% |
| C000068447 [Member] | Equity [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 97.40% |
| C000068447 [Member] | Money Market Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.60% |
| Label | Element | Value |
| C000068454 [Member] | Fitch, BBB Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 15.30% |
| C000068454 [Member] | Moody's, Aaa Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 9.10% |
| C000068454 [Member] | Fitch, AA Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 22.30% |
| C000068454 [Member] | Fitch, A Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 4.50% |
| C000068455 [Member] | Fitch, BBB Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 15.30% |
| C000068455 [Member] | Moody's, Aaa Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 9.10% |
| C000068455 [Member] | Fitch, AA Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 22.30% |
| C000068455 [Member] | Fitch, A Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 4.50% |
| C000052151 [Member] | Fitch, BBB Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 29.60% |
| C000052151 [Member] | Fitch, BB Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 0.20% |
| C000052151 [Member] | Moody's, Aaa Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 10% |
| C000052151 [Member] | Fitch, AA Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 9.20% |
| C000052151 [Member] | Fitch, A Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 22.60% |
| C000052152 [Member] | Fitch, BBB Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 29.60% |
| C000052152 [Member] | Fitch, BB Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 0.20% |
| C000052152 [Member] | Moody's, Aaa Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 10% |
| C000052152 [Member] | Fitch, AA Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 9.20% |
| C000052152 [Member] | Fitch, A Rating [Member] | ||
| Percent of Total Investments | oef_PctOfTotalInv | 22.60% |
