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Income Taxes
9 Months Ended
Sep. 30, 2019
Income Tax Disclosure [Abstract]  
Income Taxes

11.

Income Taxes

Our provision for income taxes on a consolidated basis was $63.5 million for the three months ended September 30, 2019 as compared to $95.0 million for the same period in 2018. Our effective tax rate decreased from 24.6% for the three months ended September 30, 2018 to 19.7% for the three months ended September 30, 2019. The lower tax rate for three months ended September 30, 2019 primarily resulted from the realization of a $22.1 million net tax benefit for tax over book basis in a foreign subsidiary that is expected to reverse in the foreseeable future. We benefited from discrete items for the three months ended September 30, 2019 that exceeded the benefits for other discrete items for the prior-year period.

Our provision for income taxes on a consolidated basis was $169.9 million for the nine months ended September 30, 2019 as compared to $211.4 million for the same period in 2018. Our effective tax rate decreased from 23.9% for the nine months ended September 30, 2018 to 20.7% for the nine months ended September 30, 2019. The lower tax rate for nine months ended September 30, 2019 primarily resulted from the realization of a $22.1 million net tax benefit for tax over book basis in a foreign subsidiary that is expected to reverse in the foreseeable future. We benefited from discrete items for the nine months ended September 30, 2019 that exceeded the benefits for other discrete items for the nine months ended September 30, 2018.

At December 31, 2018, we had gross unrecognized tax benefits of $95.0 million. In the third quarter of 2019, we recorded gross unrecognized tax benefits of $22.9 million, primarily related to the sustainability of certain tax attributes in light of unsettled tax law.