Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

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:

	Year Ended December 31,
Share amounts in millions	2021	2020	2019
Denominator for basic earnings per share:
Weighted average common shares outstanding	97	111	123
Effect of dilutive securities:
Dilutive effect of employee stock plans	1	1	—
Dilutive potential common shares	98	112	123
Denominator for diluted earnings per share:
Adjusted weighted average shares	98	112	123