So the Canadian company now has $200 million of cash, and it makes a share investment into its own subsidiary in a tax haven country, and that gives capital, then, to the Tax Haven Company with no expense obligation, but dividend obligation. It can lend, then, into the United States or western Europe.
In red, you'll see there are two interest expense items of $20 million. That's offset by two interest income items, but they're reported in these tax haven jurisdictions. In this case, company B would have $20 million of interest income flowing in from the U.S., and company A would have $20 million of interest income flowing in from Canada.
Essentially, on funds originating in Tax Haven Company A and ending up in a United States' company, you have the creation of a second interest expense offset by interest income. And that's how the nickname “double-dip” came about.