Income Taxes	3 Months Ended
Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act (“CARES Act”) was enacted and signed into law and includes, among other things, refundable payroll tax credits, deferment of employer side social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations, and technical corrections to tax depreciation methods for qualified improvement property. We are currently evaluating the impact of the CARES Act, but at present do not expect the provisions of the CARES Act to have a material impact on our tax provision. We operate on a global basis and are subject to numerous and complex tax laws and regulations. Additionally, tax laws continue to undergo rapid changes in both application and interpretation by various countries, including state aid interpretations and initiatives led by the Organization for Economic Cooperation and Development. Our income tax filings are subject to examinations by taxing authorities throughout the world. Income tax audits may require an extended period of time to reach resolution and may result in significant income tax adjustments when interpretation of tax laws or allocation of company profits is disputed. Although ultimate timing is uncertain, the net amount of tax liability for unrecognized tax benefits may change within the next twelve months due to changes in audit status, expiration of statutes of limitations, settlements of tax assessments and other events. Management’s best estimate of such change is within the range of a $280 million decrease to a $30 million increase. Our U.S. Federal income tax returns have been audited through 2012 and are currently under audit for years 2013-2015. The IRS has proposed adjustments for years 2005-2012, primarily related to reallocating profits between certain of our U.S. and foreign subsidiaries. We have disputed these adjustments and intend to continue to vigorously defend our positions as we pursue resolution through petitions with the U.S. Tax Court for years 2005-2009 and the administrative process with the IRS Independent Office of Appeals for years 2010-2012. A public referendum held in Switzerland passed the Federal Act on Tax Reform and AHV Financing (“TRAF”), effective January 1, 2020, and includes the abolishment of various favorable federal and cantonal tax regimes. The TRAF provides transitional relief measures for companies that are losing the tax benefit of a ruling, including a "step-up" for amortizable goodwill, equal to the amount of future tax benefit they would have received under their existing ruling, subject to certain limitations. Certain provisions of the TRAF were enacted in the third quarter of 2019, resulting in us recognizing a provisional net tax benefit of $263.8 million. In the fourth quarter of 2019, we recognized an additional $51.2 million related to TRAF as well as the tax impact of certain restructuring transactions in Switzerland. We anticipate that TRAF will have a minimal impact to our ongoing consolidated effective tax rate. In the three-month periods ended March 31, 2020 and 2019, our effective tax rate (“ETR”) was negative 1.0 percent and positive 15.6 percent, respectively. The negative tax rate in the 2020 period was primarily due to the $612.0 million goodwill impairment charge, which resulted in a loss before taxes, but has no corresponding tax benefit. Absent discrete tax events, we expect our future ETR will be lower than the U.S. corporate income tax rate of 21.0 percent due to our mix of earnings between U.S. and foreign locations, which have lower corporate income tax rates. Our ETR in future periods could also potentially be impacted by: changes in our mix of pre-tax earnings; changes in tax rates, tax laws or their interpretation, including the European Union rules on state aid; the outcome of various federal, state and foreign audits; and the expiration of certain statutes of limitations. Currently, we cannot reasonably estimate the impact of these items on our financial results.

Income Taxes

3 Months Ended

Mar. 31, 2020

13. Income Taxes

On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act (“CARES Act”) was enacted and signed into law and includes, among other things, refundable payroll tax credits, deferment of employer side social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations, and technical corrections to tax depreciation methods for qualified improvement property. We are currently evaluating the impact of the CARES Act, but at present do not expect the provisions of the CARES Act to have a material impact on our tax provision.

We operate on a global basis and are subject to numerous and complex tax laws and regulations. Additionally, tax laws continue to undergo rapid changes in both application and interpretation by various countries, including state aid interpretations and initiatives led by the Organization for Economic Cooperation and Development. Our income tax filings are subject to examinations by taxing authorities throughout the world. Income tax audits may require an extended period of time to reach resolution and may result in significant income tax adjustments when interpretation of tax laws or allocation of company profits is disputed. Although ultimate timing is uncertain, the net amount of tax liability for unrecognized tax benefits may change within the next twelve months due to changes in audit status, expiration of statutes of limitations, settlements of tax assessments and other events. Management’s best estimate of such change is within the range of a $280 million decrease to a $30 million increase.

Our U.S. Federal income tax returns have been audited through 2012 and are currently under audit for years 2013-2015. The IRS has proposed adjustments for years 2005-2012, primarily related to reallocating profits between certain of our U.S. and foreign subsidiaries. We have disputed these adjustments and intend to continue to vigorously defend our positions as we pursue resolution through petitions with the U.S. Tax Court for years 2005-2009 and the administrative process with the IRS Independent Office of Appeals for years 2010-2012.

A public referendum held in Switzerland passed the Federal Act on Tax Reform and AHV Financing (“TRAF”), effective January 1, 2020, and includes the abolishment of various favorable federal and cantonal tax regimes. The TRAF provides transitional relief measures for companies that are losing the tax benefit of a ruling, including a "step-up" for amortizable goodwill, equal to the amount of future tax benefit they would have received under their existing ruling, subject to certain limitations. Certain provisions of the TRAF were enacted in the third quarter of 2019, resulting in us recognizing a provisional net tax benefit of $263.8 million. In the fourth quarter of 2019, we recognized an additional $51.2 million related to TRAF as well as the tax impact of certain restructuring transactions in Switzerland. We anticipate that TRAF will have a minimal impact to our ongoing consolidated effective tax rate.

In the three-month periods ended March 31, 2020 and 2019, our effective tax rate (“ETR”) was negative 1.0 percent and positive 15.6 percent, respectively. The negative tax rate in the 2020 period was primarily due to the $612.0 million goodwill impairment charge, which resulted in a loss before taxes, but has no corresponding tax benefit. Absent discrete tax events, we expect our future ETR will be lower than the U.S. corporate income tax rate of 21.0 percent due to our mix of earnings between U.S. and foreign locations, which have lower corporate income tax rates. Our ETR in future periods could also potentially be impacted by: changes in our mix of pre-tax earnings; changes in tax rates, tax laws or their interpretation, including the European Union rules on state aid; the outcome of various federal, state and foreign audits; and the expiration of certain statutes of limitations. Currently, we cannot reasonably estimate the impact of these items on our financial results.