Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of Number of Common Shares Reserved for Issuance

The number of common shares reserved for issuance under the 2019 Plan are as follows: 

(in millions)	December 31,
	2024	2023
Shares available for granting 1	18.0	18.3
Options outstanding	—	0.1
Total shares reserved for issuance	18.0	18.4

1 Shares reserved for issuance under the Director Plan are less than 1.0 million at both December 31, 2024 and 2023.

Schedule of Stock-based Compensation Expense

Stock-based compensation expense and the corresponding tax benefit are as follows: 

(in millions)	Year Ended December 31,
	2024		2023		2022
Restricted stock and other stock-based awards expense	$	247	$	171	$	214
Stock option expense	—		—		—
Total stock-based compensation expense	$	247	$	171	$	214
Tax benefit	$	49	$	32	$	38

Schedule of Restricted Stock and Unit Activity

Restricted stock and other stock-based award activity is as follows: 

(in millions, except per award amounts)	Shares		Weighted-average grant-date fair value
Balance as of December 31, 2023	1.4		$	365.51
Granted	0.4		$	427.84
Vested	(0.5)		$	371.62
Forfeited	(0.1)		$	366.39
Balance as of December 31, 2024	1.2		$	387.14
Total unrecognized compensation expense related to restricted awards	$	216
Weighted-average years to be recognized over	1.1

	Year Ended December 31,
	2024		2023		2022
Weighted-average grant-date fair value per award	$	427.84	$	374.00	$	384.65
Total fair value of restricted stock and other stock-based awards vested	$	230	$	323	$	146
Tax benefit relating to restricted award activity	$	56	$	71	$	30

Schedule of Stock Option Activity

Stock option activity is as follows: 

(in millions, except per award amounts)	Shares	Weighted average exercise price		Weighted-average remaining years of contractual term	Aggregate intrinsic value
Options outstanding as of December 31, 2023	0.1	$	77.25
Exercised	(0.1)	$	77.86
Options outstanding as of December 31, 2024	—	$	74.46	2.22	$	5
Options exercisable as of December 31, 2024	—	$	74.46	2.22	$	5

Schedule of Stock Option Exercises

Information regarding our stock option exercises is as follows: 

(in millions)	Year Ended December 31,
	2024		2023		2022
Net cash proceeds from the exercise of stock options	$	4	$	13	$	7
Total intrinsic value of stock option exercises	$	19	$	55	$	13
Income tax benefit realized from stock option exercises	$	5	$	12	$	4