Contingencies and Commitments	9 Months Ended
Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Contingencies and Commitments	Note 21. Contingencies and Commitments We are parties in a variety of legal actions that routinely arise out of the normal course of business, including legal actions seeking to establish liability directly through insurance contracts or indirectly through reinsurance contracts issued by Berkshire subsidiaries. Plaintiffs occasionally seek punitive or exemplary damages. We do not believe that such normal and routine litigation will have a material effect on our financial condition or results of operations. Berkshire and certain of its subsidiaries are also involved in other kinds of legal actions, some of which assert or may assert claims or seek to impose fines and penalties. We believe that any liability that may arise as a result of other pending legal actions will not have a material effect on our consolidated financial condition or results of operations. In the third quarter of 2016, NICO entered into a definitive agreement to acquire Medical Liability Mutual Insurance Company (“MLMIC”), a writer of medical professional liability insurance domiciled in New York. MLMIC’s assets and policyholders’ surplus determined under statutory accounting principles as of June 30, 2017 were approximately $5.5 billion and $2.1 billion, respectively. The acquisition price will be based on an amount equal to the sum of: (i) the tangible book value of MLMIC at the closing date (determined under U.S. GAAP); plus (ii) $100 million. The acquisition will involve the conversion of MLMIC from a mutual company to a stock company. The closing of the transaction is subject to various regulatory approvals, customary closing conditions and the approval of the MLMIC policyholders eligible to vote on the proposed demutualization and sale. We currently expect this acquisition will be completed in early 2018. We own a 50% interest in a joint venture, Berkadia Commercial Mortgage LLC (“Berkadia”), with Leucadia National Corporation (“Leucadia”) owning the other 50% interest. Berkadia is a servicer of commercial real estate loans in the U.S. A significant source of funding for Berkadia’s operations is through the issuance of commercial paper, which is limited to $1.5 billion. Berkadia’s commercial paper outstanding is supported by a surety policy issued by a Berkshire insurance subsidiary. Leucadia has agreed to indemnify us for one-half of any losses we incur under the policy. On July 7, 2017, Berkshire Hathaway Energy Company (“BHE”) agreed to acquire 80.03% of the outstanding equity interests of Oncor Electric Delivery Company LLC (“Oncor”) for $9 billion pursuant to an agreement between BHE and Energy Future Holdings Corp. (“EFH”). In August 2017, the agreement to acquire Oncor was terminated by EFH. On October 3, 2017, we entered into an investment agreement and an equity purchase agreement whereby we acquired a 38.6% interest in Pilot Travel Centers LLC, d/b/a Pilot Flying J (“Pilot Flying J”). Pilot Flying J, headquartered in Knoxville, Tennessee, is one of the largest operators of travel centers in North America, with more than 27,000 team members, 750 locations across the U.S. and Canada, and approximately $20 billion in annual revenues. The Haslam family currently owns a 50.1% interest in Pilot Flying J and a third party owns the remaining 11.3% interest. In addition, on October 3, 2017, we entered into an agreement to acquire in 2023 an additional 41.4% interest in Pilot Flying J with the Haslam family retaining a 20% interest. As a result, Berkshire will become the majority owner in 2023.

Note 21. Contingencies and Commitments

We are parties in a variety of legal actions that routinely arise out of the normal course of business, including legal actions seeking to establish liability directly through insurance contracts or indirectly through reinsurance contracts issued by Berkshire subsidiaries. Plaintiffs occasionally seek punitive or exemplary damages. We do not believe that such normal and routine litigation will have a material effect on our financial condition or results of operations. Berkshire and certain of its subsidiaries are also involved in other kinds of legal actions, some of which assert or may assert claims or seek to impose fines and penalties. We believe that any liability that may arise as a result of other pending legal actions will not have a material effect on our consolidated financial condition or results of operations.

In the third quarter of 2016, NICO entered into a definitive agreement to acquire Medical Liability Mutual Insurance Company (“MLMIC”), a writer of medical professional liability insurance domiciled in New York. MLMIC’s assets and policyholders’ surplus determined under statutory accounting principles as of June 30, 2017 were approximately $5.5 billion and $2.1 billion, respectively. The acquisition price will be based on an amount equal to the sum of: (i) the tangible book value of MLMIC at the closing date (determined under U.S. GAAP); plus (ii) $100 million. The acquisition will involve the conversion of MLMIC from a mutual company to a stock company. The closing of the transaction is subject to various regulatory approvals, customary closing conditions and the approval of the MLMIC policyholders eligible to vote on the proposed demutualization and sale. We currently expect this acquisition will be completed in early 2018.

We own a 50% interest in a joint venture, Berkadia Commercial Mortgage LLC (“Berkadia”), with Leucadia National Corporation (“Leucadia”) owning the other 50% interest. Berkadia is a servicer of commercial real estate loans in the U.S. A significant source of funding for Berkadia’s operations is through the issuance of commercial paper, which is limited to $1.5 billion. Berkadia’s commercial paper outstanding is supported by a surety policy issued by a Berkshire insurance subsidiary. Leucadia has agreed to indemnify us for one-half of any losses we incur under the policy.

On July 7, 2017, Berkshire Hathaway Energy Company (“BHE”) agreed to acquire 80.03% of the outstanding equity interests of Oncor Electric Delivery Company LLC (“Oncor”) for $9 billion pursuant to an agreement between BHE and Energy Future Holdings Corp. (“EFH”). In August 2017, the agreement to acquire Oncor was terminated by EFH.

On October 3, 2017, we entered into an investment agreement and an equity purchase agreement whereby we acquired a 38.6% interest in Pilot Travel Centers LLC, d/b/a Pilot Flying J (“Pilot Flying J”). Pilot Flying J, headquartered in Knoxville, Tennessee, is one of the largest operators of travel centers in North America, with more than 27,000 team members, 750 locations across the U.S. and Canada, and approximately $20 billion in annual revenues. The Haslam family currently owns a 50.1% interest in Pilot Flying J and a third party owns the remaining 11.3% interest. In addition, on October 3, 2017, we entered into an agreement to acquire in 2023 an additional 41.4% interest in Pilot Flying J with the Haslam family retaining a 20% interest. As a result, Berkshire will become the majority owner in 2023.