This excerpt taken from the PNC 8-K filed Oct 5, 2006.
BUSINESS SEGMENT REPORTING
Subsequent to the BlackRock/MLIM closing, PNC will continue to report the earnings impact of its investment in BlackRock as a separate reportable business segment in accordance with Statement of Financial Accounting Standards No. 131, Disclosures about Segments of an Enterprise and Related Information. Prior period PNC business segment information for BlackRock will not be restated.