Unaudited Quarterly Results (Tables)

12 Months Ended

Dec. 31, 2018

Summarized quarterly financial data (unaudited) for the years ended December 31, 2018 and 2017 are set forth in the following tables.



	First Quarter Ended March 31, 2018⁽¹⁾		Second Quarter Ended June 30, 2018		Third Quarter Ended September 30, 2018		Fourth Quarter Ended December 31, 2018⁽²⁾⁽³⁾
Revenues	$	1,511.5	$	1,608.0	$	1,663.5	$	1,927.8
Net income	$	478.0	$	551.4	$	594.7	$	820.4
Net income per share - basic	$	4.44	$	5.12	$	5.50	$	7.58
Net income per share - diluted	$	4.16	$	4.82	$	5.17	$	7.15

	First Quarter Ended March 31, 2017		Second Quarter Ended June 30, 2017		Third Quarter Ended September 30, 2017		Fourth Quarter Ended December 31, 2017⁽⁴⁾
Revenues	$	1,319.0	$	1,470.1	$	1,500.7	$	1,582.4
Net income	$	248.9	$	387.7	$	388.3	$	173.5
Net income per share - basic	$	2.36	$	3.66	$	3.64	$	1.62
Net income per share - diluted	$	2.16	$	3.34	$	3.32	$	1.50

⁽¹⁾In the first quarter of 2018, the Company adopted ASC 606 and ASU 2016-01. Prior period amounts have not been adjusted in connection with the adoption of these accounting standards. See Note 1.
⁽²⁾ Includes impact of a cumulative catch-up adjustment recorded to revenue upon modification of the Amended IO Discovery Agreement. See Note 3.
⁽³⁾ Includes tax impact of the sale of non-inventory related assets between foreign subsidiaries completed during the fourth quarter of 2018. See Note 16.
⁽⁴⁾As a result of the Act being signed into law on December 22, 2017, the Company recognized a charge of $326.2 million in the fourth quarter of 2017 related to the re-measurement of its U.S. net deferred tax assets at the lower enacted corporate tax rate. See Note 16.