Wiktionary
multi-billion
a. 1 Having more than 1,000,000,000; in the billion range. 2 (context in the old numbering system chiefly British English), more than 1,000,000,000,000; in the old billion range.
Usage examples of "multi-billion".
They present a multi-billion dollar national health-care program as though it were the latest and greatest thing in the world.
But next moment the balance was redressed by the arrival of Rannaldini, who'd been kept on even more important business, some multi-billion Yen record deal with the Japs, and who was livid not to be the last to arrive.