Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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- Definition

The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The number of businesses acquired by the entity during the period.

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No definition available.

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Acquisitions (Details) $ in Millions		6 Months Ended
Acquisitions (Details) $ in Millions	Jun. 12, 2019 USD ($)	Jun. 30, 2019 USD ($) business	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Goodwill		$ 13,308	$ 13,085
Simplifile
Business Acquisition [Line Items]
Cash consideration	$ 338
Cash and restricted cash held by Simplifile	16
Identifiable intangible assets	113
Goodwill	218
Simplifile \| Customer Relationships
Business Acquisition [Line Items]
Identifiable intangible assets	$ 104
Useful life of intangible asset	20 years
Simplifile \| Developed Technology
Business Acquisition [Line Items]
Identifiable intangible assets	$ 7
Useful life of intangible asset	7 years
Simplifile \| Trade Names
Business Acquisition [Line Items]
Identifiable intangible assets	$ 2
Useful life of intangible asset	5 years
Bakkt
Business Acquisition [Line Items]
Number of businesses acquired \| business		2