After more than a century in business — and more than two years of planning — the time has arrived to split up First American Corp., the Santa Ana real estate services giant that employs more than 30,000 people and bills itself as America’s biggest provider of business information.

On Tuesday, each share of the company will be replaced by a share in each of two companies: the original title insurance and escrow business, which will trade as First American Financial Corp., and the newer financial data business, which also will be listed on the New York Stock Exchange, as CoreLogic Inc.