Agreements and Transactions	12 Months Ended
Dec. 31, 2017
Agreements and Transactions [Abstract]
Agreements and Transactions with Baxter	Agreements and Transactions with Baxter In connection with Baxalta’s separation from Baxter on July 1, 2015, Baxalta and Baxter entered into several separation-related agreements that provided a framework for Baxalta’s relationship with Baxter after the separation. These agreements, among others, included a manufacturing and supply agreement, a transition services agreement and a tax matters agreement. Under the terms of the manufacturing and supply agreement, the Company manufactures certain products and materials and sells them to Baxter at an agreed-upon price reflecting the Company’s cost plus a mark-up for certain products and materials. The Company reported revenues associated with the manufacturing and supply agreement with Baxter during the year ended December 31, 2017 and 2016 of approximately $137.3 million and $81.0 million, respectively. The 2016 reported revenues were for the period from June 3, 2016 acquisition date through December 31, 2016. Under the terms of the transition services agreement, the Company and Baxter provide various services to each other on an interim, transitional basis. The services provided by Baxter to the Company include certain finance, information technology, human resources, quality, supply chain and other administrative services and functions, and are generally provided on a cost-plus basis. Certain of these services extend through June 30, 2018. The Company reported Selling, general and administrative expenses associated with the transition services agreement with Baxter during the year ended December 31, 2017 and 2016 of approximately $52.3 million and $54.0 million, respectively. The 2016 reported expenses were for the period from June 3, 2016 acquisition date through December 31, 2016. For a certain portion of Baxalta’s non U.S. operations, the legal transfer of net assets from Baxter had not occurred by the June 3, 2016 acquisition date due to the time required to transfer marketing authorizations and other regulatory requirements in each of these countries. Under the terms of the international commercial operations agreement with Baxter, the Company is responsible for the business activities conducted by Baxter on its behalf, and is subject to the risks and entitled to the benefits generated by these operations and assets. As a result, the related assets and liabilities and results of operations are reported in the Company’s Consolidated Financial Statements following the acquisition of Baxalta. The majority of these operations were transferred to the Company on December 31, 2016. Net sales related to these operations for the year ended December 31, 2017 were $nil (2016: $101.0 million). The outstanding balance of the assets and liabilities related to these operations was $nil as of December 31, 2017. As of December 31, 2016 the assets and liabilities of these operations consisted of $11.0 million of inventories, which were reported in Inventories on the Consolidated Balance Sheet, other assets of $50.0 million, which were reported as Prepaid expenses and other current assets, and liabilities of $3.0 million, which were reported in Other current liabilities. The tax matters agreement governs Baxter and Baxalta’s and now the Company’s respective rights, responsibilities and obligations after the distribution with respect to taxes for any tax period ending on or before the distribution date, as well as tax periods beginning before and ending after the distribution date. In addition, the tax matters agreement addresses the allocation of liability for taxes that were incurred as a result of restructuring activities undertaken to effectuate the distribution and provides for Baxalta to indemnify Baxter against any tax liabilities resulting from Baxalta’s action or inaction that causes the merger-related transactions to be taxable. Net tax-related indemnification liabilities as of December 31, 2017 associated with the tax matters agreement with Baxter are discussed in Note 24, Commitments and Contingencies, of these Consolidated Financial Statements. As of December 31, 2017, the Company had total amounts due from or to Baxter of $103.1 million (2016: $189.0 million) reported in Prepaid expenses and other current assets, $63.2 million (2016: $72.0 million) reported in Other current liabilities and $59.6 million (2016: $92.0 million) reported in Other non-current liabilities.

Agreements and Transactions with Baxter

In connection with Baxalta’s separation from Baxter on July 1, 2015, Baxalta and Baxter entered into several separation-related agreements that provided a framework for Baxalta’s relationship with Baxter after the separation. These agreements, among others, included a manufacturing and supply agreement, a transition services agreement and a tax matters agreement.

Under the terms of the manufacturing and supply agreement, the Company manufactures certain products and materials and sells them to Baxter at an agreed-upon price reflecting the Company’s cost plus a mark-up for certain products and materials. The Company reported revenues associated with the manufacturing and supply agreement with Baxter during the year ended December 31, 2017 and 2016 of approximately $137.3 million and $81.0 million, respectively. The 2016 reported revenues were for the period from June 3, 2016 acquisition date through December 31, 2016.

Under the terms of the transition services agreement, the Company and Baxter provide various services to each other on an interim, transitional basis. The services provided by Baxter to the Company include certain finance, information technology, human resources, quality, supply chain and other administrative services and functions, and are generally provided on a cost-plus basis. Certain of these services extend through June 30, 2018. The Company reported Selling, general and administrative expenses associated with the transition services agreement with Baxter during the year ended December 31, 2017 and 2016 of approximately $52.3 million and $54.0 million, respectively. The 2016 reported expenses were for the period from June 3, 2016 acquisition date through December 31, 2016.

For a certain portion of Baxalta’s non U.S. operations, the legal transfer of net assets from Baxter had not occurred by the June 3, 2016 acquisition date due to the time required to transfer marketing authorizations and other regulatory requirements in each of these countries. Under the terms of the international commercial operations agreement with Baxter, the Company is responsible for the business activities conducted by Baxter on its behalf, and is subject to the risks and entitled to the benefits generated by these operations and assets. As a result, the related assets and liabilities and results of operations are reported in the Company’s Consolidated Financial Statements following the acquisition of Baxalta. The majority of these operations were transferred to the Company on December 31, 2016. Net sales related to these operations for the year ended December 31, 2017 were $nil (2016: $101.0 million). The outstanding balance of the assets and liabilities related to these operations was $nil as of December 31, 2017. As of December 31, 2016 the assets and liabilities of these operations consisted of $11.0 million of inventories, which were reported in Inventories on the Consolidated Balance Sheet, other assets of $50.0 million, which were reported as Prepaid expenses and other current assets, and liabilities of $3.0 million, which were reported in Other current liabilities.

The tax matters agreement governs Baxter and Baxalta’s and now the Company’s respective rights, responsibilities and obligations after the distribution with respect to taxes for any tax period ending on or before the distribution date, as well as tax periods beginning before and ending after the distribution date. In addition, the tax matters agreement addresses the allocation of liability for taxes that were incurred as a result of restructuring activities undertaken to effectuate the distribution and provides for Baxalta to indemnify Baxter against any tax liabilities resulting from Baxalta’s action or inaction that causes the merger-related transactions to be taxable. Net tax-related indemnification liabilities as of December 31, 2017 associated with the tax matters agreement with Baxter are discussed in Note 24, Commitments and Contingencies, of these Consolidated Financial Statements.

As of December 31, 2017, the Company had total amounts due from or to Baxter of $103.1 million (2016: $189.0 million) reported in Prepaid expenses and other current assets, $63.2 million (2016: $72.0 million) reported in Other current liabilities and $59.6 million (2016: $92.0 million) reported in Other non-current liabilities.