Trump promised more details on his long-awaited tax-reform plan Wednesday, setting up a potentially arduous process in Congress that could include battles among Republicans over what such an overhaul should look like.

Bloomberg, citing a White House official familiar with Trump’s tax plans, said an estimated $2.6 trillion held by companies offshore was one of the elements of tax plans discussed with Congressional leadership on Tuesday by White House chief economic adviser, Gary Cohn, and Treasury Secretary Steven Mnuchin.

The report said the plans include a cut on the top income tax rate on pass-through businesses, such as hedge funds, to 15 percent from 39.6 percent.

For more on potential Trump tax plans, see Bloomberg’s report.