The FRED series Total Credit Market Instruments - Liabilities - Balance Sheet of Nonfarm Nonfinancial Corporate Business is now known as Nonfinancial Corporate Business; Credit Market Instruments; Liability.
The source series id is FL104104005.Q.
This series appears in both Table B.102 and Table L.1. For further information see the assistance provided in the guide to the Financial Accounts at http://www.federalreserve.gov/apps/fof/.
Board of Governors of the Federal Reserve System (US), Nonfinancial Corporate Business; Credit Market Instruments; Liability, Level [TCMILBSNNCB], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/TCMILBSNNCB, June 20, 2018.