Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2020

Earnings Per Common Share [Abstract]

Schedule Of Basic And Diluted Earnings Per Share

The following table summarizes the calculation of basic and diluted EPS for the three and six months ended June 30, 2020 and 2019:

	Three months ended				Six months ended
	June 30,				June 30,
	2020		2019		2020		2019
Net (loss) income used for basic and diluted calculation	$	(1,068.1)	$	459.8	$	(510.5)	$	1,047.7
Shares used in computing earnings (loss) per common share—basic	220.6		224.2		221.1		224.0
Weighted-average effect of dilutive securities:
Stock awards	—		1.4		—		1.7
Shares used in computing earnings (loss) per common share—diluted	220.6		225.6		221.1		225.7
Earnings (loss) per common share:
Basic	$	(4.84)	$	2.05	$	(2.31)	$	4.68
Diluted	$	(4.84)	$	2.04	$	(2.31)	$	4.64