Vanguard Consumer Discretionary Index Fund Average Annual Total Returns - Admiral Prospectus [Member]	12 Months Ended	60 Months Ended	120 Months Ended
	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2024
Consumer Discretionary Spliced Index (reflects no deduction for fees, expenses, or taxes)[Member]
Prospectus [Line Items]
Average Annual Return, Percent	24.48%	16.03%	13.87%
MSCI US IMI/Consumer Discretionary 25/50 (reflects no deduction for fees, expenses, or taxes)[Member]
Prospectus [Line Items]
Average Annual Return, Percent	24.48%	16.03%	14.04%
MSCI US Investable Market 2500 Index (reflects no deduction for fees, expenses, or taxes)[Member]
Prospectus [Line Items]
Average Annual Return, Percent	23.82%	14.02%	12.64%
Admiral Shares
Prospectus [Line Items]
Average Annual Return, Percent	24.39%	15.95%	13.79%
Admiral Shares \| After Taxes on Distributions
Prospectus [Line Items]
Average Annual Return, Percent	24.14%	15.58%	13.43%
Admiral Shares \| After Taxes on Distributions and Sales
Prospectus [Line Items]
Average Annual Return, Percent	14.58%	12.77%	11.47%