v3.26.1
Shareholder Report, Holdings (Details)
Jun. 30, 2026
C000162768 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.20% [1],[2]
C000162768 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 54.90% [1]
C000162768 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 4.00% [1]
C000162768 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Total Investments 5.80% [1]
C000162768 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Total Investments 1.50% [1]
C000162768 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Total Investments 2.10% [1]
C000162768 [Member] | ITALY  
Holdings [Line Items]  
Percent of Total Investments 3.30% [1]
C000162768 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Total Investments 1.50% [1]
C000162768 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 2.00% [1]
C000162768 [Member] | CHINA  
Holdings [Line Items]  
Percent of Total Investments 4.20% [1]
C000162768 [Member] | CAYMAN ISLANDS  
Holdings [Line Items]  
Percent of Total Investments 2.50% [1]
C000162768 [Member] | Capital Trusts [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60% [1]
C000162768 [Member] | Floating Rate Loan Interests [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.40% [1]
C000162768 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.20% [1]
C000162768 [Member] | Non Agency Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.50% [1]
C000162768 [Member] | U S Government Sponsored Agency Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 20.50% [1]
C000162768 [Member] | Foreign Agency Obligations [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.30% [1]
C000162768 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [1],[3]
C000162768 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [1]
C000162768 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70% [1]
C000162768 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20% [1]
C000162768 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.30% [1]
C000038980 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.20% [4],[5]
C000038980 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 54.90% [4]
C000038980 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 4.00% [4]
C000038980 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Total Investments 5.80% [4]
C000038980 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Total Investments 1.50% [4]
C000038980 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Total Investments 2.10% [4]
C000038980 [Member] | ITALY  
Holdings [Line Items]  
Percent of Total Investments 3.30% [4]
C000038980 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Total Investments 1.50% [4]
C000038980 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 2.00% [4]
C000038980 [Member] | CHINA  
Holdings [Line Items]  
Percent of Total Investments 4.20% [4]
C000038980 [Member] | CAYMAN ISLANDS  
Holdings [Line Items]  
Percent of Total Investments 2.50% [4]
C000038980 [Member] | Capital Trusts [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60% [4]
C000038980 [Member] | Floating Rate Loan Interests [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.40% [4]
C000038980 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.20% [4]
C000038980 [Member] | Non Agency Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.50% [4]
C000038980 [Member] | U S Government Sponsored Agency Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 20.50% [4]
C000038980 [Member] | Foreign Agency Obligations [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.30% [4]
C000038980 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [4],[6]
C000038980 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [4]
C000038980 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70% [4]
C000038980 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20% [4]
C000038980 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.30% [4]
C000007879 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.20% [7],[8]
C000007879 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 54.90% [7]
C000007879 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 4.00% [7]
C000007879 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Total Investments 5.80% [7]
C000007879 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Total Investments 1.50% [7]
C000007879 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Total Investments 2.10% [7]
C000007879 [Member] | ITALY  
Holdings [Line Items]  
Percent of Total Investments 3.30% [7]
C000007879 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Total Investments 1.50% [7]
C000007879 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 2.00% [7]
C000007879 [Member] | CHINA  
Holdings [Line Items]  
Percent of Total Investments 4.20% [7]
C000007879 [Member] | CAYMAN ISLANDS  
Holdings [Line Items]  
Percent of Total Investments 2.50% [7]
C000007879 [Member] | Capital Trusts [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60% [7]
C000007879 [Member] | Floating Rate Loan Interests [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.40% [7]
C000007879 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.20% [7]
C000007879 [Member] | Non Agency Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.50% [7]
C000007879 [Member] | U S Government Sponsored Agency Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 20.50% [7]
C000007879 [Member] | Foreign Agency Obligations [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.30% [7]
C000007879 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [7],[9]
C000007879 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [7]
C000007879 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70% [7]
C000007879 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20% [7]
C000007879 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.30% [7]
C000007882 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.20% [10],[11]
C000007882 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Total Investments 54.90% [10]
C000007882 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Total Investments 4.00% [10]
C000007882 [Member] | SPAIN  
Holdings [Line Items]  
Percent of Total Investments 5.80% [10]
C000007882 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Total Investments 1.50% [10]
C000007882 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Total Investments 2.10% [10]
C000007882 [Member] | ITALY  
Holdings [Line Items]  
Percent of Total Investments 3.30% [10]
C000007882 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Total Investments 1.50% [10]
C000007882 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Total Investments 2.00% [10]
C000007882 [Member] | CHINA  
Holdings [Line Items]  
Percent of Total Investments 4.20% [10]
C000007882 [Member] | CAYMAN ISLANDS  
Holdings [Line Items]  
Percent of Total Investments 2.50% [10]
C000007882 [Member] | Capital Trusts [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.60% [10]
C000007882 [Member] | Floating Rate Loan Interests [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.40% [10]
C000007882 [Member] | Investment Companies [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.20% [10]
C000007882 [Member] | Non Agency Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.50% [10]
C000007882 [Member] | U S Government Sponsored Agency Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 20.50% [10]
C000007882 [Member] | Foreign Agency Obligations [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.30% [10]
C000007882 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.30% [10],[12]
C000007882 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [10]
C000007882 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.70% [10]
C000007882 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.20% [10]
C000007882 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.30% [10]
[1]
Excludes short-term securities, short investments and options, if any.
[2]
Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other.
[3]
Ten largest investment types are presented. Additional investment types are found in Other.
[4]
Excludes short-term securities, short investments and options, if any.
[5] Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other.
[6] Ten largest investment types are presented. Additional investment types are found in Other.
[7]
Excludes short-term securities, short investments and options, if any.
[8]
Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other.
[9]
Ten largest investment types are presented. Additional investment types are found in Other.
[10]
Excludes short-term securities, short investments and options, if any.
[11]
Ten largest countries/geographic regions are presented. Additional countries/geographic regions are found in Other.
[12]
Ten largest investment types are presented. Additional investment types are found in Other.