Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table sets forth the computation of basic and diluted earnings per share on net income (in millions, except per share information):

	Three months ended September 30,				Nine months ended September 30,
	2020		2019		2020		2019
Earnings:
Net income	$	213	$	263	$	283	$	635
Shares:
Weighted average outstanding shares	68		63		65		63
Equivalent shares from outstanding stock options	—		1		—		1
Denominator for diluted calculation	68		64		65		64
Earnings per share:
Basic	$	3.13	$	4.19	$	4.39	$	10.13
Diluted	$	3.12	$	4.12	$	4.36	$	9.93

Schedule Of Earnings Per Share Basic And Diluted By Common Class [Text Block]

The following table presents approximate amounts of stock options and performance contingent shares excluded from the calculation of common equivalent shares (in thousands):

	Three months ended September 30,		Nine months ended September 30,
	2020	2019	2020	2019
Excluded from common equivalent shares:
Stock options	1,692	139	993	416
Performance contingent shares	82	258	27	182