UPDATE: 5/16/14, 12:35 p.m. EDT. Energy Future Holdings has paid $23.5 million to Sidley Austin and Kirkland & Ellis in the prelude to its Chapter 11 case, according to reports by Bloomberg and The Wall Street Journal.

Energy Future Holdings Corp., the Texas energy giant formerly known as TXU until a record-setting $45 billion private equity buyout in 2007, filed for bankruptcy Tuesday in Delaware.