Ernst & Young’s leaders are expected this week to give the green light to splitting its auditing and consulting businesses, paving the way for the biggest shake-up in the accounting profession in more than 20 years, according to people familiar with the matter.

The accounting giant’s global executive committee, which oversees the firm’s 312,000-person worldwide network, met on Labor Day to put the finishing touches to the plan for a worldwide breakup, the people familiar with the matter said. The committee is expected to approve the plan later this week, which will trigger votes on the deal by EY’s roughly 13,000 partners, who stand to make windfalls averaging more than a million dollars each.