Constellation Energy Group has repaid the $1 billion it owed to Warren Buffett’s MidAmerican Energy Holdings Co., one of the conditions of the breakup of its merger with that company, according to regulatory filings Wednesday. Repayment of the loan, which occurred Monday, included $5 million in interest on the debt. Including the impact of the repayment, Constellation’s estimated net available cash on Dec. 31 was approximately $2.4 billion, the company said.

– Aaron Cahall