MGM Mirage, which has warned it could breach its credit agreements this year if the economy doesn't rebound, may break itself up to lure potential buyers as it races to raise the more than $1.5 billion it owes in bond payments and interest this year, the Wall Street Journal reported on Saturday. Citing unnamed people "familiar with the matter," the paper said buyers had been "sizing up" several of the casino operator's separate properties, including the Bellagio and the MGM Grand Detroit.