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Acquisitions and Dispositions of Businesses - Schedule of Net Assets Acquired (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Assets acquired |  |  |
Goodwill | $ 8,165 | $ 8,171 | $ 8,358
2018 and 2019 Acquisitions |  |  |
Consideration transferred |  |  |
Cash | 42 |  |
Deferred and contingent consideration | 8 |  |
Aggregate consideration transferred | 50 |  |
Assets acquired |  |  |
Cash and cash equivalents | 4 |  |
Receivables, net | 0 |  |
Goodwill | 34 |  |
Intangible assets, net | 22 |  |
Fixed assets, net | 1 |  |
Other assets | 13 |  |
Total assets acquired | 74 |  |
Liabilities assumed |  |  |
Current liabilities | 18 |  |
Other non-current liabilities | 6 |  |
Total liabilities assumed | 24 |  |
Net assets acquired | $ 50 |  |

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