Acquisitions (Narrative) (Details) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018 USD ($) item
Number of businesses acquired \| item		2
Purchase consideration		$ 841
Communications Market Division [Member]
Purchase consideration		841
Other intangible assets		525
Business combination, acquisition related costs		18
Communications Market Division [Member] \| Customer Relationships [Member]
Other intangible assets		$ 434
Intangible asset estimated useful lives		14 years
Communications Market Division [Member] \| Other Intangible Assets [Member]
Other intangible assets		$ 91
Intangible asset estimated useful lives		11 years
Minimum [Member]
Intangible asset estimated useful lives	4 years
Maximum [Member]
Intangible asset estimated useful lives	50 years

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
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- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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

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