Citi Bank’s 'Live Richly' marketing campaign famously cost more than $1 billion dollars before it was terminated.
Amazon spends almost a billion a month on marketing. Procter & Gamble is almost the same. L'oreal is around $850 million a month in marketing spend. I'm sure some of their campaigns run into the tens of millions easily. In fact, I think it would be pretty difficult to spend a billion dollars on marketing every thirty days without at least one individual campaign spending more than $10 million.