U.K. Prime Minister Theresa May finally has her much-needed government majority.
Under the deal the DUP's 10 lawmakers will back the Conservatives in key votes in the House of Commons, which includes the budget and the queen's speech.
The DUP will also support legislation on national security and Brexit. That's not surprising because Brexit negotiations were the reason May called for a snap election.
So what does the DUP get in return? Almost $1.3 billion.
That's on top of the more than $600 million it was already set to get from the government before the deal.
The DUP will spend the total $1.9 billion over the next two years on infrastructure, high-speed internet access and education in Northern Ireland.
U.K. regional leaders were very critical of the deal; one said it was pretty much a "blank cheque" for a Conservative-backed Brexit.