Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Share-based Payment Arrangement [Abstract]

Share-based Compensation, Stock Options, Activity

($ in millions)	2022	2021	2020
Total stock-based compensation	$35	$57	$44
Income tax benefit recognized	$8	$12	$10

Weighted Average Assumptions Used in Calculating the Fair Value of Stock Option

The following weighted average assumptions were used to calculate the fair values of stock option grants in each year:

	2022		2021		2020
Weighted average exercise price	$151.87		$136.60		$119.52
Risk-free interest rate	2.0	%	1.0	%	1.6	%
Expected life of option in years	6.5		6.5		6.5
Expected dividend yield	1.6	%	1.6	%	1.5	%
Expected volatility	25.7	%	25.3	%	20.0	%

Stock Options Outstanding, Exercisable and Activity

Stock Options Outstanding and Exercisable	Number of Shares	Weighted Average Exercise Price	Weighted Average Remaining Contractual Life (in years)	Intrinsic Value (in millions)
Outstanding, January 1, 2022	3,340,402	$110.98	6.1
Granted	487,277	$151.87
Exercised	(158,837)	$77.24
Forfeited/Expired	(151,391)	$134.34
Outstanding, December 31, 2022	3,517,451	$117.16	5.7	$47
Vested or expected to vest, December 31, 2022	3,444,650	$116.57	5.6	$47
Exercisable, December 31, 2022	2,039,716	$104.58	4.0	$43

Stock Option Activity

The following table presents stock option activity for the years ended December 31, 2022, 2021 and 2020:

($ in millions)	2022	2021	2020
Total intrinsic value of stock options exercised	$12	$32	$31
Cash received from stock option exercises	$12	$47	$54
Income tax benefit from the exercise of stock options	$3	$8	$7
Total fair value of stock options vested	$16	$11	$11

RSU Activity

RSU Activity	Number of Shares	Weighted Average Grant Date Fair Value
Outstanding, January 1, 2022	622,055	$125.92
Granted	232,050	$147.77
Vested	(199,642)	$147.36
Forfeited	(65,075)	$122.60
Outstanding, December 31, 2022	589,388	$136.99
Vested or expected to vest, December 31, 2022	563,900	$136.67