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Commitments and Contingencies (Details) $ in Millions	Jun. 30, 2019 USD ($) claim	Dec. 31, 2018 USD ($)	Jan. 19, 2018 claim
Loss Contingencies [Line Items]
Loss Contingency Accrual | $	$ 76	$ 74
Wireless Encryption Litigation
Loss Contingencies [Line Items]
Number of claims	5
Wireless Encryption Litigation, Federal
Loss Contingencies [Line Items]
Number of claims	3
Wireless Encryption Litigation, State
Loss Contingencies [Line Items]
Number of claims	2
Shareholder Litigation
Loss Contingencies [Line Items]
Number of claims			5

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- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
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Number of pending claims pertaining to a loss contingency.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
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-Paragraph 4
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