SACRAMENTO, Dec 6 (AP) — California could become the first state to fine big oil companies for making too much money, a reaction to the industry’s supersized profits following a summer of record-high gas prices in the nation’s most populous state.

Gov. Gavin Newsom and his Democratic allies in the state Legislature introduced the proposal Monday as lawmakers returned to the state Capitol in Sacramento for the start of a special legislative session focused solely on the oil industry.

But the proposal was missing key details, including how much profit is too much for oil companies and what fine they would have to pay for exceeding it. Newsom’s office said those details would be sorted out later after negotiations with lawmakers. Any money from the fines would be returned to the public.

Gas prices are always higher in California because of taxes, fees and environmental regulations that other states don’t have. But in October, the average price of a gallon of gasoline in California was more than $2.60 higher than the national average — the biggest gap ever.

Newsom said there was no good way to justify that.

Speaking to reporters, Newsom compared the actions of oil companies to price gougers charging more for hand sanitizer during the pandemic. He said the goal of the penalty is to prevent gas prices from shooting up similarly in the future, calling it “a proactive effort in order to change behavior.”