Income taxes - Tax Rates (Details) |
6 Months Ended | 12 Months Ended | |||
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Apr. 01, 2017 |
Dec. 31, 2015 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Jun. 30, 2015 |
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| Her Majesty's Revenue and Customs (HMRC) | |||||
| Income taxes | |||||
| Tax rate (as a percent) | 19.00% | 20.00% | 19.25% | 20.00% | 20.75% |
| Internal Revenue Service (IRS) | |||||
| Income taxes | |||||
| Tax rate (as a percent) | 34.00% | 34.00% | 34.00% | 34.00% | |
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- References No definition available.
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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