Income Taxes	9 Months Ended
Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Act. The Tax Act represents significant U.S. federal tax reform legislation that includes a permanent reduction to the U.S. federal corporate income tax rate. The permanent reduction to the federal corporate income tax rate resulted in a one-time gain of $267.0 million related to the value of our deferred tax liabilities and a gain of $3.2 million related to the lower blended tax rate on our earnings, in the year ended March 31, 2018, resulting in a net gain of $270.2 million. Additionally, the Tax Act subjects certain of our cumulative foreign earnings and profits to U.S. income taxes through a deemed repatriation, which resulted in a charge of $1.9 million in the year ended March 31, 2018. Income taxes are recorded in our quarterly financial statements based on our estimated annual effective income tax rate, subject to adjustments for discrete events, should they occur. The effective rates used in the calculation of income taxes were 25.2% and (446.1)% for the three months ended December 31, 2018 and 2017, respectively. The effective rates used in the calculation of income taxes were 26.6% and (137.6)% for the nine months ended December 31, 2018 and 2017, respectively. The increases in the effective tax rates for the three and nine months ended December 31, 2018 versus the respective prior year periods were primarily related to the Tax Act being enacted in the prior year periods, which included a one-time gain as discussed above. The balance in our uncertain tax liability was $9.8 million at December 31, 2018 and $10.8 million at March 31, 2018. We recognize interest and penalties related to uncertain tax positions as a component of income tax expense. We did not incur any material interest or penalties related to income taxes in any of the periods presented.

Income Taxes

On December 22, 2017, the U.S. government enacted comprehensive tax legislation commonly referred to as the Tax Act. The Tax Act represents significant U.S. federal tax reform legislation that includes a permanent reduction to the U.S. federal corporate income tax rate. The permanent reduction to the federal corporate income tax rate resulted in a one-time gain of $267.0 million related to the value of our deferred tax liabilities and a gain of $3.2 million related to the lower blended tax rate on our earnings, in the year ended March 31, 2018, resulting in a net gain of $270.2 million. Additionally, the Tax Act subjects certain of our cumulative foreign earnings and profits to U.S. income taxes through a deemed repatriation, which resulted in a charge of $1.9 million in the year ended March 31, 2018.

Income taxes are recorded in our quarterly financial statements based on our estimated annual effective income tax rate, subject to adjustments for discrete events, should they occur. The effective rates used in the calculation of income taxes were 25.2% and (446.1)% for the three months ended December 31, 2018 and 2017, respectively. The effective rates used in the calculation of income taxes were 26.6% and (137.6)% for the nine months ended December 31, 2018 and 2017, respectively. The increases in the effective tax rates for the three and nine months ended December 31, 2018 versus the respective prior year periods were primarily related to the Tax Act being enacted in the prior year periods, which included a one-time gain as discussed above.

The balance in our uncertain tax liability was $9.8 million at December 31, 2018 and $10.8 million at March 31, 2018. We recognize interest and penalties related to uncertain tax positions as a component of income tax expense. We did not incur any material interest or penalties related to income taxes in any of the periods presented.