Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Basic and Diluted

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:

	2023				2022			2021
($ 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	$	2,212			2,330			2,659
Less: Income allocated to participating     securities	—				2			7
Net income allocated to common     shareholders	$	2,212	684	3.23	2,328	689	3.38	2,652	702	3.78
Earnings Per Diluted Share:
Net income available to common     shareholders	$	2,212			2,330			2,659
Effect of dilutive securities:
Stock-based awards	—		4		—	6		—	9
Net income available to common     shareholders plus assumed conversions	2,212				2,330			2,659
Less: Income allocated to participating     securities	—				2			7
Net income allocated to common     shareholders plus assumed conversions	$	2,212	688	3.22	2,328	695	3.35	2,652	711	3.73