Source: Board of Governors of the Federal Reserve System (US)  

Release: H.4.1 Factors Affecting Reserve Balances  

Units:  Millions of U.S. Dollars, Not Seasonally Adjusted

Frequency:  Weekly, As of Wednesday

This item is the sum of "Term deposits held by depository institutions," "U.S. Treasury, general account," "U.S. Treasury, supplementary financing account," "foreign official accounts," "service-related deposits," and "other deposits.