Collaborations	12 Months Ended
Dec. 31, 2017
Collaborative Arrangements [Abstract]
Collaborations	Collaborations A collaborative arrangement is a contractual arrangement that involves a joint operating activity. Such arrangements involve two or more parties that are both: (i) active participants in the activity and (ii) exposed to significant risks and rewards dependent on the commercial success of the activity. From time to time, we enter into collaborative arrangements for the R&D, manufacture and/or commercialization of products and/or product candidates. These collaborations generally provide for non-refundable upfront license fees, development and commercial-performance milestone payments, cost sharing, royalty payments and/or profit sharing. Our collaboration arrangements are performed with no guarantee of either technological or commercial success, and each is unique in nature. Our significant arrangements are discussed below. Novartis AG In April 2017, we expanded our existing migraine collaboration with Novartis AG (Novartis). In the United States, Amgen and Novartis will jointly develop and collaborate on the commercialization of Aimovig^™. Amgen, as the principal, will recognize product sales of Aimovig^™ in the United States, will share U.S. commercialization costs with Novartis and will pay Novartis a significant royalty on net sales in the United States. Novartis holds global co-development rights and exclusive commercial rights outside the United States and Japan for Aimovig^™and other specified migraine programs. Novartis will pay Amgen double-digit royalties on net sales of the products in the Novartis exclusive territories. Novartis will fund a portion of global R&D expenses. Novartis will also make payments to Amgen that could collectively amount to approximately $400 million if certain regulatory events occur and commercial thresholds are achieved with respect to Aimovig^™in the United States. Amgen will manufacture and supply Aimovig^™ worldwide. The migraine collaboration will continue for the commercial life of the products unless terminated in accordance with its terms. During the years ended December 31, 2017, 2016 and 2015, costs recovered from Novartis for the migraine products were $124 million, $33 million and $6 million, respectively. Costs recovered were recorded primarily in Research and development expense in the Consolidated Statements of Income. During the year ended December 31, 2017, we received a milestone payment of $60 million from Novartis, which was recorded in Other revenues in the Consolidated Statement of Income. During the year ended December 31, 2015, we paid an upfront license fee of $30 million to Novartis, which was recorded in Research and development expense in the Consolidated Statement of Income. Pfizer Inc. The co-promotion term of our Enbrel^® collaboration agreement with Pfizer Inc. (Pfizer) in the United States and Canada expired on October 31, 2013. Under this agreement, we paid Pfizer a profit share until October 31, 2013, and residual royalties from November 1, 2013 to October 31, 2016, which were significantly less than the profit share payments. In 2015 and 2016, the residual royalty payments ranged from 11% to 10% of annual net ENBREL sales in the United States and Canada. Effective November 1, 2016, there are no further royalty payments. During the years ended December 31, 2016 and 2015, residual royalties due to Pfizer on ENBREL sales were $470 million and $561 million, respectively. These amounts were recorded in Selling, general and administrative expense in the Consolidated Statements of Income. UCB We are in a collaboration with UCB for the development and commercialization of EVENITY^™. In 2016, we amended the commercialization rights and responsibilities of the parties. Under the amended agreement, we have the rights to commercialize EVENITY^™ for all indications in the United States, Japan and Hong Kong. UCB has the rights for Europe, China and Brazil. The rest of the countries have been allocated to Amgen. Generally, development costs and future worldwide commercialization profits and losses related to the collaboration after accounting for expenses are shared equally. The collaboration agreement will continue in effect unless terminated earlier in accordance with its terms. During the years ended December 31, 2017, 2016 and 2015, the net costs recovered from UCB were $56 million, $48 million and $60 million, respectively, which were recorded primarily in Research and development expense in the Consolidated Statements of Income. Bayer HealthCare Pharmaceuticals Inc. We are in a collaboration with Bayer HealthCare Pharmaceuticals Inc. (Bayer) to jointly develop and commercialize Nexavar^® worldwide, except in Japan. The rights to develop and market Nexavar^® in Japan are reserved to Bayer. Nexavar^® is currently marketed and sold in more than 100 countries around the world for the treatment of unresectable liver cancer and advanced kidney cancer. In the United States, Nexavar^® is also approved for the treatment of patients with locally recurrent or metastatic, progressive, differentiated thyroid carcinoma refractory to radioactive iodine treatment. In 2015, we amended the terms of our collaboration agreement with Bayer, which terminated the co-promotion agreement in the United States, and transferred all U.S. operational responsibilities to Bayer, including commercial and medical affairs activities. Prior to the termination of the co-promotion agreement, we co-promoted Nexavar^® with Bayer and shared equally in the profits or losses in the United States. In lieu of this profit share, Bayer now pays Amgen a royalty on U.S. sales of Nexavar^® at a percentage rate in the high 30s. Amgen no longer contributes sales force personnel or medical liaisons to support Nexavar^® in the United States. There are no changes to the global R&D or non-U.S. profit share arrangements in the original agreement, as discussed below. In all countries outside the United States, excluding Japan, Bayer manages all commercialization activities and incurs all of the sales and marketing expenditures and mutually agreed R&D expenses, for which we continue to reimburse Bayer for half. In these countries, we continue to receive 50% of net profits on sales of Nexavar^® after deducting certain Bayer-related costs. The agreement with Bayer will terminate at the later of the date when patents expire that were issued in connection with product candidates discovered under the agreement, or on the last day when we or Bayer market or sell products commercialized under the agreement anywhere in the world. During the years ended December 31, 2017, 2016 and 2015, Amgen recorded Nexavar^® net profits of $161 million, $167 million and $257 million, respectively, which were recognized as Other revenues in the Consolidated Statements of Income. During the years ended December 31, 2017, 2016 and 2015, Amgen recorded royalty income of $133 million, $137 million and $72 million, respectively, in Other revenues in the Consolidated Statements of Income, pursuant to the 2015 amendment to the collaboration agreement. Net R&D expenses related to the agreement were not material for the years ended December 31, 2017, 2016, and 2015. Other In addition to the collaborations discussed above, we have various others that are not individually significant to our business at this time. Pursuant to the terms of those agreements, we may be required to pay or we may receive additional amounts upon the achievement of various development and commercial milestones which in the aggregate could be significant. We may also incur or have reimbursed to us significant R&D costs if the related product candidate were to advance to late stage clinical trials. In addition, if any products related to these collaborations are approved for sale, we may be required to pay or we may receive significant royalties on future sales. The payment of these amounts, however, is contingent upon the occurrence of various future events, which have a high degree of uncertainty of occurrence.

Collaborations

A collaborative arrangement is a contractual arrangement that involves a joint operating activity. Such arrangements involve two or more parties that are both: (i) active participants in the activity and (ii) exposed to significant risks and rewards dependent on the commercial success of the activity.

From time to time, we enter into collaborative arrangements for the R&D, manufacture and/or commercialization of products and/or product candidates. These collaborations generally provide for non-refundable upfront license fees, development and commercial-performance milestone payments, cost sharing, royalty payments and/or profit sharing. Our collaboration arrangements are performed with no guarantee of either technological or commercial success, and each is unique in nature. Our significant arrangements are discussed below.

Novartis AG

In April 2017, we expanded our existing migraine collaboration with Novartis AG (Novartis). In the United States, Amgen and Novartis will jointly develop and collaborate on the commercialization of Aimovig^™. Amgen, as the principal, will recognize product sales of Aimovig^™ in the United States, will share U.S. commercialization costs with Novartis and will pay Novartis a significant royalty on net sales in the United States. Novartis holds global co-development rights and exclusive commercial rights outside the United States and Japan for Aimovig^™and other specified migraine programs. Novartis will pay Amgen double-digit royalties on net sales of the products in the Novartis exclusive territories. Novartis will fund a portion of global R&D expenses. Novartis will also make payments to Amgen that could collectively amount to approximately $400 million if certain regulatory events occur and commercial thresholds are achieved with respect to Aimovig^™in the United States. Amgen will manufacture and supply Aimovig^™ worldwide.

The migraine collaboration will continue for the commercial life of the products unless terminated in accordance with its terms.

During the years ended December 31, 2017, 2016 and 2015, costs recovered from Novartis for the migraine products were $124 million, $33 million and $6 million, respectively. Costs recovered were recorded primarily in Research and development expense in the Consolidated Statements of Income. During the year ended December 31, 2017, we received a milestone payment of $60 million from Novartis, which was recorded in Other revenues in the Consolidated Statement of Income. During the year ended December 31, 2015, we paid an upfront license fee of $30 million to Novartis, which was recorded in Research and development expense in the Consolidated Statement of Income.

Pfizer Inc.

The co-promotion term of our Enbrel^® collaboration agreement with Pfizer Inc. (Pfizer) in the United States and Canada expired on October 31, 2013. Under this agreement, we paid Pfizer a profit share until October 31, 2013, and residual royalties from November 1, 2013 to October 31, 2016, which were significantly less than the profit share payments. In 2015 and 2016, the residual royalty payments ranged from 11% to 10% of annual net ENBREL sales in the United States and Canada. Effective November 1, 2016, there are no further royalty payments.

During the years ended December 31, 2016 and 2015, residual royalties due to Pfizer on ENBREL sales were $470 million and $561 million, respectively. These amounts were recorded in Selling, general and administrative expense in the Consolidated Statements of Income.

UCB

We are in a collaboration with UCB for the development and commercialization of EVENITY^™. In 2016, we amended the commercialization rights and responsibilities of the parties. Under the amended agreement, we have the rights to commercialize EVENITY^™ for all indications in the United States, Japan and Hong Kong. UCB has the rights for Europe, China and Brazil. The rest of the countries have been allocated to Amgen. Generally, development costs and future worldwide commercialization profits and losses related to the collaboration after accounting for expenses are shared equally. The collaboration agreement will continue in effect unless terminated earlier in accordance with its terms. During the years ended December 31, 2017, 2016 and 2015, the net costs recovered from UCB were $56 million, $48 million and $60 million, respectively, which were recorded primarily in Research and development expense in the Consolidated Statements of Income.

Bayer HealthCare Pharmaceuticals Inc.

We are in a collaboration with Bayer HealthCare Pharmaceuticals Inc. (Bayer) to jointly develop and commercialize Nexavar^® worldwide, except in Japan. The rights to develop and market Nexavar^® in Japan are reserved to Bayer. Nexavar^® is currently marketed and sold in more than 100 countries around the world for the treatment of unresectable liver cancer and advanced kidney cancer. In the United States, Nexavar^® is also approved for the treatment of patients with locally recurrent or metastatic, progressive, differentiated thyroid carcinoma refractory to radioactive iodine treatment.

In 2015, we amended the terms of our collaboration agreement with Bayer, which terminated the co-promotion agreement in the United States, and transferred all U.S. operational responsibilities to Bayer, including commercial and medical affairs activities. Prior to the termination of the co-promotion agreement, we co-promoted Nexavar^® with Bayer and shared equally in the profits or losses in the United States. In lieu of this profit share, Bayer now pays Amgen a royalty on U.S. sales of Nexavar^® at a percentage rate in the high 30s. Amgen no longer contributes sales force personnel or medical liaisons to support Nexavar^® in the United States. There are no changes to the global R&D or non-U.S. profit share arrangements in the original agreement, as discussed below.

In all countries outside the United States, excluding Japan, Bayer manages all commercialization activities and incurs all of the sales and marketing expenditures and mutually agreed R&D expenses, for which we continue to reimburse Bayer for half. In these countries, we continue to receive 50% of net profits on sales of Nexavar^® after deducting certain Bayer-related costs.

The agreement with Bayer will terminate at the later of the date when patents expire that were issued in connection with product candidates discovered under the agreement, or on the last day when we or Bayer market or sell products commercialized under the agreement anywhere in the world.

During the years ended December 31, 2017, 2016 and 2015, Amgen recorded Nexavar^® net profits of $161 million, $167 million and $257 million, respectively, which were recognized as Other revenues in the Consolidated Statements of Income. During the years ended December 31, 2017, 2016 and 2015, Amgen recorded royalty income of $133 million, $137 million and $72 million, respectively, in Other revenues in the Consolidated Statements of Income, pursuant to the 2015 amendment to the collaboration agreement. Net R&D expenses related to the agreement were not material for the years ended December 31, 2017, 2016, and 2015.

Other

In addition to the collaborations discussed above, we have various others that are not individually significant to our business at this time. Pursuant to the terms of those agreements, we may be required to pay or we may receive additional amounts upon the achievement of various development and commercial milestones which in the aggregate could be significant. We may also incur or have reimbursed to us significant R&D costs if the related product candidate were to advance to late stage clinical trials. In addition, if any products related to these collaborations are approved for sale, we may be required to pay or we may receive significant royalties on future sales. The payment of these amounts, however, is contingent upon the occurrence of various future events, which have a high degree of uncertainty of occurrence.