Page 60 of their 2019 annual report will show you (link below). The TCJA (Tax Cut/Job Act) removed $1.354 billion from what they were expected to pay. They had several other benefits against their overall tax rate, but that was by far the highest in 2018. It lead to them owing -5% in taxes or $219 million.
http://s1.q4cdn.com/714383399/files/doc_financials/annual/20...