Fonterra, along with several others, had put in a proposal for Murray Goulburn, which had earlier reported a A$370.8m loss for 2016/17.
Dedoncker said Fonterra Australia's total milk intake was now 2 billion litres in Victoria and Tasmania.
Fonterra said about A$130m would be spent on to putting capacity to handle an extra 500m litres milk, and a further A$35m for a range of annual site improvements as part of its regular capital investment plan in Australia.
The expansion includes:
• A$125m expansion at Fonterra Australia's flagship Stanhope cheese facility in northern Victoria, doubling the size of the cheese plant.
• A$12m investment in Tasmania, which includes expansion to its Wynyard cheese plant and an increase in lactose processing capacity at Spreyton.
• A further A$7m expansion at the Darnum nutritionals plant in Gippsland - where Fonterra has a joint venture with China's Beingmate - as well as the installation of two robotic palletisers in Bayswater in eastern Victoria.
• A$13.5m for projects at Cobden and another A$8.6 million at Dennington in western Victoria.
At present, Stanhope can produce 45,000 tonnes of product including cheddar, mozzarella, gouda, parmesan, pecorino, romano and ricotta.