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Commitments and Contingencies (Details) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 USD ($) claim | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($)
Loss Contingencies [Line Items] |  |  |
Indefinite-lived trademarks | $ |  |  | $ 987,000,000
Obligations Under Tax Agreements |  |  |
Loss Contingencies [Line Items] |  |  |
Obligations included in liabilities | $ | $ 2,000,000 | $ 2,000,000 |
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 |  |
Tyco International |  |  |
Loss Contingencies [Line Items] |  |  |
Liability threshold | $ | $ 500,000,000 |  |
Tax liability sharing percent | 27.00% |  |

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- Definition Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trademark to gain or protect exclusive use of a business name, symbol or other device or style for a projected indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 + Details
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