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Collaborations (Bayer HealthCare Pharmaceuticals Inc.) (Details) - Collaborative Arrangement with Bayer [Member] $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($) country | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Nexavar [Member] |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |
Number of countries product is marketed and sold | country | 100 |  |
Collaboration, royalty percentage in the high 30s | 30.00% |  |
Percentage of net profits after deducting certain partner related costs | 50.00% |  |
Nexavar [Member] | Other revenues [Member] |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |
Collaboration profit | $ 164 | $ 161 | $ 167
Royalty [Member] | Other revenues [Member] |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |
Revenues | $ 91 | $ 133 | $ 137

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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 + Details
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