Income Taxes

Income tax provisions for interim periods are based on estimated annual income tax rates, adjusted to reflect the effects of any significant infrequent or unusual items which are required to be discretely recognized within the current interim period. As a result of the Tax Cuts and Jobs Act of 2017, the Company changed its indefinite reversal assertion related to its undistributed earnings of its foreign subsidiaries and no longer considers a majority of its foreign earnings permanently reinvested outside of the United States (the "U.S."). As a result, the effective tax rates in the periods presented are largely based upon the forecasted pre-tax earnings mix and allocation of certain expenses in various taxing jurisdictions where the Company conducts its business.

The effective tax rate is as follows:



	Three Months Ended March 31,
In millions	2018		2017
Effective tax rate	12.5	%	—	%

For the three months ended March 31, 2018 and March 31, 2017, no material discrete tax items were recorded.