PITTSBURGH (WPXI) — Paul O’Neill, a former Treasury secretary who broke with George W. Bush over tax policy and then produced a book critical of the administration, died Saturday. He was 84. O’Neill’s son, Paul O’Neill Jr. confirmed that his father died at his home in Pittsburgh after battling lung cancer for the last couple of years. After a few surgeries and chemotherapy, he decided against any further intervention four or five months ago, he said. A former head of aluminum giant Alcoa, O’Neill served as Treasury secretary from 2001 to late 2002. He was forced to resign after he objected to a second round of tax cuts because of their impact on deficits. While at Alcoa, O’Neill lifted the company out of the doldrums during his 12-year stint as the Pittsburgh company’s CEO. Shortly after he took the job in April 1987, he began emphasizing factory safety and employee dignity as a top priority. Before joining Alcoa, O’Neill had been president from 1985 to 1987 of International Paper Co. In June 2019, O’Neill received the Gerald R. Ford Medal for Distinguished Public Service, according to a piece in his hometown paper, the Pittsburgh Post-Gazette. O’Neill is survived by his wife, four children, 12 grandchildren and 15 great grandchildren.