Business combinations and disposal - Schedule of the Valuation of the Intangible Assets Acquired (Details) - General Dynamics Information Technology's Citizen Engagement Centers $ in Thousands |
12 Months Ended |
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Sep. 30, 2019
USD ($)
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| Components of intangible assets | |
| Fair value | $ 122,300 |
| Customer relationships - all contracts except U.S. Census | |
| Components of intangible assets | |
| Useful life | 10 years |
| Fair value | $ 85,300 |
| Customer relationship - U.S. Census | |
| Components of intangible assets | |
| Useful life | 2 years |
| Fair value | $ 37,000 |
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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. No definition available.
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- Definition 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. No definition available.
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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