According to The Hollywood Reporter:
"Tron: Legacy crossed the $100 million mark at the domestic box office on Tuesday. The movie, budgeted at $170 million, which has been in U.S. theaters for 12 days, has also made around $75 million overseas.
The most interesting note about the domestic number is that almost a quarter of the box office receipts -- about $25 million -- are from IMAX theaters. Tron is playing in 3,451 theaters across Canada and the U.S., with only 235 of those being IMAX houses. For that low count to generate 25% of the gross is astonishing. And a record proportion for IMAX."