Earnings Per Share

12 Months Ended

Dec. 31, 2021

The following table provides the calculation of earnings per share and the reconciliation of earnings per share and earnings per diluted share for the years ended December 31:


	2021				2020			2019
($ in millions, except per share data)	Income		Average Shares	Per Share Amount	Income	Average Shares	Per Share Amount	Income	Average Shares	Per Share Amount
Earnings Per Share:
Net income available to common shareholders	$	2,659			1,323			2,419
Less: Income allocated to participating securities	7				6			21
Net income allocated to common shareholders	$	2,652	702	3.78	1,317	715	1.84	2,398	710	3.38
Earnings Per Diluted Share:
Net income available to common shareholders	$	2,659			1,323			2,419
Effect of dilutive securities:
Stock-based awards	—		9		—	5		—	10
Net income available to common shareholders plus assumed conversions	2,659				1,323			2,419
Less: Income allocated to participating securities	7				6			21
Net income allocated to common shareholders plus assumed conversions	$	2,652	711	3.73	1,317	720	1.83	2,398	720	3.33

Shares are excluded from the computation of earnings per diluted share when their inclusion has an anti-dilutive effect on earnings per share. The diluted earnings per share computation for the years ended December 31, 2021, 2020 and 2019 excludes an immaterial amount, 7 million and 2 million shares, respectively, of stock-based awards because their inclusion would have been anti-dilutive.