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Acquisitions and Other Investments - Summary of Aggregate Purchase Price Consideration Allocated to Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | $ 840 |  | $ 756 |  | $ 758
Series of Individually Immaterial Business Acquisition |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | 85 | [1] | 11 | [2] |
Intangible assets |  | 26 | [3] | 14 | [4] |
Net tangible assets (liabilities) | [5] | (1) |  |  |  |
Total purchase price consideration |  | $ 110 | [6] | $ 23 | [7] |
Weighted average life of preliminary identifiable definite-lived intangible assets acquired |  | 6 years |  | 8 years |  |
Cash acquired from acquisition |  | $ 2 |  |  |  |
Assets acquired, accounts receivable |  | 3 |  |  |  |
Assets acquired, prepaid expenses and other current assets |  | 2 |  |  |  |
Liabilities assumed |  | 8 |  |  |  |
Deferred tax liabilities, net |  |  |  | $ (2) |  |
Series of Individually Immaterial Business Acquisition | Trade Names |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets |  | $ 2 |  |  |  |
Weighted average life of preliminary identifiable definite-lived intangible assets acquired |  | 2 years |  |  |  |
Series of Individually Immaterial Business Acquisition | Customer Lists and Supplier Relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets |  | $ 10 |  | $ 6 |  |
Weighted average life of preliminary identifiable definite-lived intangible assets acquired |  | 8 years |  | 10 years |  |
Series of Individually Immaterial Business Acquisition | Subscriber Relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets |  | $ 6 |  |  |  |
Weighted average life of preliminary identifiable definite-lived intangible assets acquired |  | 3 years |  |  |  |
Series of Individually Immaterial Business Acquisition | Developed Technology and Other |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets |  | $ 8 |  | $ 8 |  |
Weighted average life of preliminary identifiable definite-lived intangible assets acquired |  | 6 years |  | 6 years |  |
Series of Individually Immaterial Business Acquisition | Not Deductible for Tax Purposes |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | $ 50 |  |  |  |
[1] | Goodwill of $50 million is not deductible for tax purposes.
[2] | Goodwill is not deductible for tax purposes.
[3] | Preliminary identifiable definite-lived intangible assets acquired during 2019 were comprised of trade names of $2 million with a weighted average life of 2 years, customer lists and supplier relationships of $10 million with a weighted average life of 8 years, subscriber relationships of $6 million with a weighted average life of approximately 3 years, and technology and other of $8 million with a weighted average life of approximately 6 years. The overall weighted-average life of the identifiable definite-lived intangible assets acquired in the purchase of these businesses during 2019 was 6 years, and will be amortized on a straight-line basis over their estimated useful lives from acquisition date.
[4] | Identifiable definite-lived intangible assets acquired during 2018 were comprised of supplier relationships of $6 million with a weighted average life of 10 years and technology and other of $8 million with a weighted average life of approximately 6 years. The overall weighted-average life of the identifiable definite-lived intangible assets acquired in the purchase of this business during 2018 was 8 years, and will be amortized on a straight-line basis over the estimated useful lives from acquisition date.
[5] | Primarily includes cash acquired of $2 million, accounts receivable of $3 million, prepaid expenses and other current assets of $2 million and liabilities assumed of $8 million, including accounts payable, accrued expenses and other current liabilities, and deferred revenue, which reflect their respective fair values at acquisition.
[6] | Subject to adjustment based on (i) final working capital adjustment calculations; and (ii) indemnification obligations for general representations and warranties of certain acquired company stockholders.
[7] | Subject to adjustment based on indemnification obligations for general representations and warranties of certain acquired company stockholders.

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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=116869197&loc=d3e4845-128472 + Details
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