Commitments and Contingencies	12 Months Ended
Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 21. COMMITMENTS AND CONTINGENCIES LEGAL MATTERS In January 2007, the Environmental Protection Agency (EPA) notified us that we were a potentially responsible party under the Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA) and the Clean Water Act for cleanup at a site in northern Idaho known as Avery Landing, which we acquired in 1980 from the Milwaukee Railroad. The land we owned at the site and the adjacent properties were contaminated with petroleum as a result of the railroad’s operations at the site prior to 1980. Our remediation was completed in October 2013, and in 2016 the EPA confirmed that we had completed the required cleanup and subsequent monitoring of the property. Separately, in September 2015, the EPA sent us a letter asserting that the Department of Transportation (the current owner of a portion of the adjacent property remediated by the EPA) and the EPA had incurred $9.8 million in unreimbursed response costs associated with the site and that we were liable for such costs. We sold the land at Avery Landing in 2017. In April 2018, the United States District Court for the District of Idaho entered a Consent Decree negotiated by the parties releasing us and our affiliates from any further liability for past response costs incurred by the U.S. government in exchange for a final settlement payment of $6.0 million. At any given time, we are subject to claims and actions incidental to the operations of our business. Based on information currently available, we do not expect that any sums we may receive or have to pay in connection with any legal proceeding would have a materially adverse effect on our consolidated financial position, operating results or net cash flow.

Commitments and Contingencies

12 Months Ended

Dec. 31, 2019

Commitments And Contingencies Disclosure [Abstract]

NOTE 21. COMMITMENTS AND CONTINGENCIES

LEGAL MATTERS

In January 2007, the Environmental Protection Agency (EPA) notified us that we were a potentially responsible party under the Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA) and the Clean Water Act for cleanup at a site in northern Idaho known as Avery Landing, which we acquired in 1980 from the Milwaukee Railroad. The land we owned at the site and the adjacent properties were contaminated with petroleum as a result of the railroad’s operations at the site prior to 1980. Our remediation was completed in October 2013, and in 2016 the EPA confirmed that we had completed the required cleanup and subsequent monitoring of the property. Separately, in September 2015, the EPA sent us a letter asserting that the Department of Transportation (the current owner of a portion of the adjacent property remediated by the EPA) and the EPA had incurred $9.8 million in unreimbursed response costs associated with the site and that we were liable for such costs. We sold the land at Avery Landing in 2017. In April 2018, the United States District Court for the District of Idaho entered a Consent Decree negotiated by the parties releasing us and our affiliates from any further liability for past response costs incurred by the U.S. government in exchange for a final settlement payment of $6.0 million.

At any given time, we are subject to claims and actions incidental to the operations of our business. Based on information currently available, we do not expect that any sums we may receive or have to pay in connection with any legal proceeding would have a materially adverse effect on our consolidated financial position, operating results or net cash flow.