Nature of Business and Organization	3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business and Organization	Note 1. Nature of Business and Organization Nature of Business Elanco Animal Health Incorporated (Elanco Parent) and its subsidiaries (collectively, Elanco, the Company, we, us or our) was formed as a wholly-owned subsidiary of Eli Lilly and Company (Lilly). Elanco is a global animal health company that innovates, develops, manufactures and markets products for companion and food animals. We offer a diverse portfolio of more than 125 brands to veterinarians and food animal producers in more than 90 countries. Organization Elanco Parent was formed in 2018, as a wholly-owned subsidiary of Lilly, to serve as the ultimate parent company of substantially all of the animal health businesses of Lilly. On September 24, 2018, Elanco Parent completed an initial public offering resulting in the issuance of 72.3 million shares of its common stock (including shares issued pursuant to the underwriters’ option to purchase additional shares), which represented 19.8% of the outstanding shares, at $24 per share (IPO) for a total net proceeds, after underwriting discounts and commissions, of $1.7 billion. In connection with the completion of the IPO, through a series of equity and other transactions, Lilly transferred to Elanco Parent the animal health businesses that form its business going forward. In exchange Elanco Parent has paid, or will pay, to Lilly approximately $4.2 billion, which includes the net proceeds from the IPO, the net proceeds from the debt offering completed by Elanco Parent in August 2018 and the term loan facility entered into by Elanco Parent in September 2018 (see Note 8). These transactions are collectively referred to herein as the Separation. On February 8, 2019, Lilly announced an exchange offer whereby Lilly shareholders could exchange all or a portion of Lilly common stock for shares of Elanco common stock owned by Lilly. The disposition of Elanco shares was completed on March 11, 2019 and resulted in the full separation of Elanco and disposal of Lilly's entire ownership and voting interest in Elanco.

Note 1. Nature of Business and Organization

Nature of Business

Elanco Animal Health Incorporated (Elanco Parent) and its subsidiaries (collectively, Elanco, the Company, we, us or our) was formed as a wholly-owned subsidiary of Eli Lilly and Company (Lilly). Elanco is a global animal health company that innovates, develops, manufactures and markets products for companion and food animals. We offer a diverse portfolio of more than 125 brands to veterinarians and food animal producers in more than 90 countries.

Organization

Elanco Parent was formed in 2018, as a wholly-owned subsidiary of Lilly, to serve as the ultimate parent company of substantially all of the animal health businesses of Lilly.

On September 24, 2018, Elanco Parent completed an initial public offering resulting in the issuance of 72.3 million shares of its common stock (including shares issued pursuant to the underwriters’ option to purchase additional shares), which represented 19.8% of the outstanding shares, at $24 per share (IPO) for a total net proceeds, after underwriting discounts and commissions, of $1.7 billion. In connection with the completion of the IPO, through a series of equity and other transactions, Lilly transferred to Elanco Parent the animal health businesses that form its business going forward. In exchange Elanco Parent has paid, or will pay, to Lilly approximately $4.2 billion, which includes the net proceeds from the IPO, the net proceeds from the debt offering completed by Elanco Parent in August 2018 and the term loan facility entered into by Elanco Parent in September 2018 (see Note 8). These transactions are collectively referred to herein as the Separation.

On February 8, 2019, Lilly announced an exchange offer whereby Lilly shareholders could exchange all or a portion of Lilly common stock for shares of Elanco common stock owned by Lilly. The disposition of Elanco shares was completed on March 11, 2019 and resulted in the full separation of Elanco and disposal of Lilly's entire ownership and voting interest in Elanco.