v3.26.3
Shareholder Report, Holdings (Details)
Aug. 31, 2026
C000080842 [Member] | Two to 3 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70%
C000080842 [Member] | One to 2 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.50%
C000080842 [Member] | Under 1 Year [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000080842 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000080841 [Member] | Two to 3 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70%
C000080841 [Member] | One to 2 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.50%
C000080841 [Member] | Under 1 Year [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000080841 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000080843 [Member] | Two to 3 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70%
C000080843 [Member] | One to 2 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.50%
C000080843 [Member] | Under 1 Year [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000080843 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000080846 [Member] | Two To 4 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.50%
C000080846 [Member] | Four To 6 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.50%
C000080846 [Member] | Six To 8 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.40%
C000080846 [Member] | Eight To 10 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000080846 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000080844 [Member] | Two To 4 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.50%
C000080844 [Member] | Four To 6 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.50%
C000080844 [Member] | Six To 8 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.40%
C000080844 [Member] | Eight To 10 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000080844 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000080845 [Member] | Two To 4 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.50%
C000080845 [Member] | Four To 6 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.50%
C000080845 [Member] | Six To 8 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.40%
C000080845 [Member] | Eight To 10 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000080845 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000080848 [Member] | Over 25 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.90%
C000080848 [Member] | Twenty To 25 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000080848 [Member] | Fifteen To 20 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.70%
C000080848 [Member] | Ten To 15 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
C000080848 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000080847 [Member] | Over 25 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.90%
C000080847 [Member] | Twenty To 25 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000080847 [Member] | Fifteen To 20 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.70%
C000080847 [Member] | Ten To 15 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
C000080847 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000080849 [Member] | Over 25 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.90%
C000080849 [Member] | Twenty To 25 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.10%
C000080849 [Member] | Fifteen To 20 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.70%
C000080849 [Member] | Ten To 15 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
C000080849 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000080852 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000080852 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.50%
C000080852 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
C000080852 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000080852 [Member] | Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
C000080852 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000080852 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000080852 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000080852 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000080852 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000080852 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000080852 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000080852 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000080850 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000080850 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.50%
C000080850 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
C000080850 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000080850 [Member] | Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
C000080850 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000080850 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000080850 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000080850 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000080850 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000080850 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000080850 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000080850 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000080851 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000080851 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.50%
C000080851 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70%
C000080851 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000080851 [Member] | Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
C000080851 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000080851 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000080851 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000080851 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000080851 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000080851 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000080851 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000080851 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000080854 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000080854 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.70%
C000080854 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
C000080854 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000080854 [Member] | Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000080854 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
C000080854 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000080854 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000080854 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000080854 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000080854 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000080854 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000080854 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000080853 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000080853 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.70%
C000080853 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
C000080853 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000080853 [Member] | Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000080853 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
C000080853 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000080853 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000080853 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000080853 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000080853 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000080853 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000080853 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000080855 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000080855 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.70%
C000080855 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
C000080855 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000080855 [Member] | Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000080855 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.70%
C000080855 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000080855 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000080855 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000080855 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000080855 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000080855 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000080855 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000080858 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000080858 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
C000080858 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.90%
C000080858 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000080858 [Member] | Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000080858 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000080858 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000080858 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000080858 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000080858 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000080858 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000080858 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000080858 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000080856 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000080856 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
C000080856 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.90%
C000080856 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000080856 [Member] | Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000080856 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000080856 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000080856 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000080856 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000080856 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000080856 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000080856 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000080856 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000080857 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000080857 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.30%
C000080857 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.90%
C000080857 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000080857 [Member] | Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000080857 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000080857 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000080857 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000080857 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000080857 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000080857 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000080857 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000080857 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000080860 [Member] | Thirty To 40 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000080860 [Member] | Twenty To 30 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 83.90%
C000080860 [Member] | Ten To 20 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
C000080860 [Member] | Zero To 10 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000080860 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000080859 [Member] | Thirty To 40 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000080859 [Member] | Twenty To 30 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 83.90%
C000080859 [Member] | Ten To 20 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
C000080859 [Member] | Zero To 10 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000080859 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000080861 [Member] | Thirty To 40 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000080861 [Member] | Twenty To 30 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 83.90%
C000080861 [Member] | Ten To 20 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.50%
C000080861 [Member] | Zero To 10 Years [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000080861 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000195056 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000195056 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.30%
C000195056 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.20%
C000195056 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000195056 [Member] | Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
C000195056 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
C000195056 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
C000195056 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000195056 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.70%
C000195056 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000195056 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00%
C000195056 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000195056 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000203194 [Member] | Other Assets and Liabilities Net [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000203194 [Member] | Vanguard Total International Bond ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 48.90%
C000203194 [Member] | Vanguard Total Bond Market ETF [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.10%