Shareholder Report, Average Annual Return (Details)	12 Months Ended	60 Months Ended	120 Months Ended
Shareholder Report, Average Annual Return (Details)	Jun. 30, 2026	Jun. 30, 2026	Jun. 30, 2026
C000005587
Average Annual Return [Line Items]
Average Annual Return, Percent	5.14%	5.58%	7.87%
C000005589
Average Annual Return [Line Items]
Average Annual Return, Percent	9.24%	5.94%	7.78%
Without Sales Load [Member] \| C000199787
Average Annual Return [Line Items]
Average Annual Return, Percent	11.31%	7.05%	8.78%
Without Sales Load [Member] \| C000005591
Average Annual Return [Line Items]
Average Annual Return, Percent	10.65%	6.40%	8.03%
Without Sales Load [Member] \| C000005590
Average Annual Return [Line Items]
Average Annual Return, Percent	11.19%	6.99%	8.69%
Without Sales Load [Member] \| C000005587
Average Annual Return [Line Items]
Average Annual Return, Percent	10.96%	6.72%	8.45%
Without Sales Load [Member] \| C000005589
Average Annual Return [Line Items]
Average Annual Return, Percent	10.18%	5.94%	7.78%
MSCI EAFE Index (Net)
Average Annual Return [Line Items]
Average Annual Return, Percent	20.23%	9.05%	9.66%
MSCI EAFE Index (Net)
Average Annual Return [Line Items]
Average Annual Return, Percent	20.23%	9.05%	9.66%
MSCI EAFE Index (Net)
Average Annual Return [Line Items]
Average Annual Return, Percent	20.23%	9.05%	9.66%
MSCI EAFE Index (Net)
Average Annual Return [Line Items]
Average Annual Return, Percent	20.23%	9.05%	9.66%
MSCI EAFE Index (Net)
Average Annual Return [Line Items]
Average Annual Return, Percent	20.23%	9.05%	9.66%