Soo... 12 TWh? Isn't that why we have metric prefixes? So we don't have to say that there's 12 billion of something...
Billion can mean different things in different parts of the world. kilo-, mega-, giga-, tera- are the standard prefixes.
120 trillion dWh is how I like to think about this. Very impressive.
Outside of tech circles, it's pretty normal to avoid using the uncommon prefixes. Nobody says the Earth has a 40 megameter circumference...