Income taxes - Tax Rates (Details) |
12 Months Ended | |||
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Apr. 01, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Her Majesty's Revenue and Customs (HMRC) | ||||
| Income taxes | ||||
| Tax rate (as a percent) | 19.00% | 19.00% | 19.25% | 20.00% |
| Internal Revenue Service (IRS) | ||||
| Income taxes | ||||
| Tax rate (as a percent) | 21.00% | 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://fasb.org/us-gaap/role/ref/legacyRef
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