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Business Combinations - Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Jun. 01, 2018 | Mar. 31, 2018
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 10,519 |  | $ 10,924
Medical Specialties Distributors LLC (“MSD”) |  |  |
Business Acquisition [Line Items] |  |  |
Receivables |  | $ 115 |
Other current assets, net of cash and cash equivalents acquired |  | 73 |
Goodwill |  | 376 |
Intangible assets |  | 326 |
Other long-term assets |  | 57 |
Current liabilities |  | (72) |
Other long-term liabilities |  | (91) |
Net assets acquired, net of cash and cash equivalents |  | $ 784 |

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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