Alphabet Inc Class C [Member] Samsung Electronics Co Ltd [Member] Broadcom Inc [Member] Tencent Holdings Ltd [Member] Alphabet Inc Class A [Member] Amazon com Inc [Member] Microsoft Corp [Member] Taiwan Semiconductor Manufacturing Co Ltd [Member] Apple Inc [Member] NVIDIA Corp [Member] Liabilities in Excess of Other Assets [Member] C000012004 [Member] Diversified Equity Master Portfolio Real Estate Sector [Member] Healthcare Sector [Member] Financial Services Sector [Member] Energy Sector [Member] Short-Term Investments [Member] Corporate Bond Securities [Member] Commercial Paper [Member] Certificates of Deposit [Member] Municipal Bonds [Member] Repurchase Agreements [Member] C000012005 [Member] Money Market Master Portfolio U S Treasury Obligations [Member] Time Deposits [Member] Other Assets Less Liabilities [Member] Capital Trusts [Member] Berkshire Hathaway Inc Class B [Member] Tesla Inc [Member] Meta Platforms Inc Class A [Member] C000012007 [Member] P 500 Index Master Portfolio C000012008 [Member] Treasury Money Market Master Portfolio N R [Member] Non Agency Mortgage Backed Securities [Member] Foreign Agency Obligations [Member] U S Government Sponsored Agency Securities [Member] C000012009 [Member] U.S. Total Bond Index Master Portfolio Asset-Backed Securities [Member] Standard & Poor's, BBB Rating [Member] Standard & Poor's, A Rating [Member] Standard & Poor's, AA Rating [Member] Standard & Poor's, AAA Rating [Member] C000101834 [Member] Large Cap Index Master Portfolio Nestle SA Class N [Member] Novartis AG Class N [Member] HSBC Holdings PLC [Member] AstraZeneca PLC [Member] Roche Holding AG [Member] Alibaba Group Holding Ltd [Member] ASML Holding NV [Member] C000104371 [Member] Total International ex U.S. Index Master Portfolio UNITED STATES UNITED KINGDOM TAIWAN SWITZERLAND JAPAN INDIA GERMANY FRANCE CHINA CANADA AUSTRALIA ITALY NETHERLANDS SPAIN C000135466 [Member] International Tilts Master Portfolio Other [Member] SAP SE [Member] ABB Ltd Class N [Member] Safran SA [Member] Deutsche Telekom AG Class N [Member] Barclays PLC [Member] Sony Group Corp [Member] AIA Group Ltd [Member] Hitachi Ltd [Member] Investment Type [Axis] Net Assets Investment Company Portfolio Turnover No Trading Symbol Flag