Daily Kos: Nationalisation is the solution
It was full nationalisation
I would say it was partial nationalisation and strong re-regulation. It was a lot of different actions taken. The best description I have found is from swedish wikipedia. The article is not very good (it appears to lean heavily on one source and lacks proper sourcing) but I will translate the key part anyway as it illustrates the mix of actions taken. Unfortunately I lack the sources to improve it.