Taxation	9 Months Ended
Sep. 30, 2018
Income Tax Disclosure [Abstract]
Taxation	Taxation For the three and nine months ended September 30, 2018, the effective tax rate on income from continuing operations was 28% (2017: 2%) and 18% (2017:4%), respectively. The effective tax rate for the three and nine months ended September 30, 2018 has been affected by certain provisions of the U.S. Tax Cuts and Jobs Act (Tax Act) passed in December, 2017, which reduces the U.S. federal corporate income tax rate from 35% to 21% along with anti-deferral provisions related to non-U.S. operations, new limitations on certain deductions required under the Tax Act, and reductions in the quantum of and tax benefit associated with U.S. integration costs over the prior year. The Company continued to assess the financial statement impact of the applicable provisions of the Tax Act upon enactment during the three and nine months ended September 30, 2018 and based on these assessments, income tax expense increased by $60.0 million and $37.9 million during these periods, respectively. The increase in tax expense recorded during the three and nine months ended September 30, 2018 was due to i) an adjustment to the U.S. deferred tax balances recorded as of December 31, 2017 related to the corporate income tax rate reduction of a $15.0 million tax expense and $7.1 million tax benefit, respectively; and ii) an increase to income tax expense of $45.0 million related to the repatriation toll charge. The change in the toll charge was partially driven by an adjustment of $31.0 million related to the tax rates applied to certain drivers of the provisional repatriation toll charge in 2017, as well as the finalization of inputs to the calculation of the repatriation toll charge and the refinement of the Company’s computation for the various guidance and regulations issued during 2018. The changes to its original tax reform impacts increased the effective tax rate for the three and nine months ended September 30, 2018 by 8% and 2%, respectively. It is expected that additional interpretive guidance will be issued during the measurement period that may change how the Company has computed the provisional amounts for the year ended December 31, 2017. The Company will continue to assess the impact of the Tax Act during the measurement period and will record any adjustments to its provisional estimates as needed during the remainder of the measurement period and continues to assert that all amounts recorded and disclosed to date remain provisional. The effective tax rate for the three and nine months ended September 30, 2017 was affected by the combined impact of the relative quantum of the profit before tax for the period by jurisdiction as well as significant acquisition and integration costs. Additionally, certain discrete tax adjustments were recorded during the year, which contributed to the low effective rate, including a tax benefit associated with the filing of the US tax returns and reversal of prior period income tax reserves.

Taxation

For the three and nine months ended September 30, 2018, the effective tax rate on income from continuing operations was 28% (2017: 2%) and 18% (2017:4%), respectively.

The effective tax rate for the three and nine months ended September 30, 2018 has been affected by certain provisions of the U.S. Tax Cuts and Jobs Act (Tax Act) passed in December, 2017, which reduces the U.S. federal corporate income tax rate from 35% to 21% along with anti-deferral provisions related to non-U.S. operations, new limitations on certain deductions required under the Tax Act, and reductions in the quantum of and tax benefit associated with U.S. integration costs over the prior year.

The Company continued to assess the financial statement impact of the applicable provisions of the Tax Act upon enactment during the three and nine months ended September 30, 2018 and based on these assessments, income tax expense increased by $60.0 million and $37.9 million during these periods, respectively. The increase in tax expense recorded during the three and nine months ended September 30, 2018 was due to i) an adjustment to the U.S. deferred tax balances recorded as of December 31, 2017 related to the corporate income tax rate reduction of a $15.0 million tax expense and $7.1 million tax benefit, respectively; and ii) an increase to income tax expense of $45.0 million related to the repatriation toll charge. The change in the toll charge was partially driven by an adjustment of $31.0 million related to the tax rates applied to certain drivers of the provisional repatriation toll charge in 2017, as well as the finalization of inputs to the calculation of the repatriation toll charge and the refinement of the Company’s computation for the various guidance and regulations issued during 2018. The changes to its original tax reform impacts increased the effective tax rate for the three and nine months ended September 30, 2018 by 8% and 2%, respectively.

It is expected that additional interpretive guidance will be issued during the measurement period that may change how the Company has computed the provisional amounts for the year ended December 31, 2017. The Company will continue to assess the impact of the Tax Act during the measurement period and will record any adjustments to its provisional estimates as needed during the remainder of the measurement period and continues to assert that all amounts recorded and disclosed to date remain provisional.

The effective tax rate for the three and nine months ended September 30, 2017 was affected by the combined impact of the relative quantum of the profit before tax for the period by jurisdiction as well as significant acquisition and integration costs. Additionally, certain discrete tax adjustments were recorded during the year, which contributed to the low effective rate, including a tax benefit associated with the filing of the US tax returns and reversal of prior period income tax reserves.