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

Release: H.8 Assets and Liabilities of Commercial Banks in the United States  

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

Frequency:  Monthly

The source has discontinued this series, and as such, will no longer be updated in FRED. For more information, please see the H.8 announcements.
For further information, please refer to the Board of Governors of the Federal Reserve System's H.8 release, online at http://www.federalreserve.gov/releases/h8/.