U.S. Tax Reform	3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Tax Disclosure	U.S. Tax Reform On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the "Tax Act"). In the period ended December 31, 2017, we recorded a provisional discrete net tax benefit related to the transition tax, remeasurement of deferred taxes, our reassessment of permanently reinvested earnings, uncertain tax positions and valuation allowances, and actions taken in anticipation of the Tax Act. The provisional amounts recorded in 2017 were finalized in 2018. During 2018, we recorded discrete net tax expense related to new guidance issued during 2018 affecting tax benefits we recorded in the period ended December 31, 2017 for the transition tax and certain tax planning actions taken in anticipation of the Tax Act. At December 31, 2018, we finalized our policy and elected to use the period cost method for global intangible low-taxed income (“GILTI”) provisions and therefore have not recorded deferred taxes for basis differences expected to reverse in future periods. In the first quarter of 2018, we recorded discrete net tax expense of $82 primarily related to guidance issued affecting tax benefits we recorded in the fourth quarter of 2017 for certain tax planning actions taken in anticipation of the Tax Act.

U.S. Tax Reform

3 Months Ended

Mar. 31, 2019

U.S. Tax Reform

On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the "Tax Act"). In the period ended December 31, 2017, we recorded a provisional discrete net tax benefit related to the transition tax, remeasurement of deferred taxes, our reassessment of permanently reinvested earnings, uncertain tax positions and valuation allowances, and actions taken in anticipation of the Tax Act. The provisional amounts recorded in 2017 were finalized in 2018. During 2018, we recorded discrete net tax expense related to new guidance issued during 2018 affecting tax benefits we recorded in the period ended December 31, 2017 for the transition tax and certain tax planning actions taken in anticipation of the Tax Act. At December 31, 2018, we finalized our policy and elected to use the period cost method for global intangible low-taxed income (“GILTI”) provisions and therefore have not recorded deferred taxes for basis differences expected to reverse in future periods.

In the first quarter of 2018, we recorded discrete net tax expense of $82 primarily related to guidance issued affecting tax benefits we recorded in the fourth quarter of 2017 for certain tax planning actions taken in anticipation of the Tax Act.