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Stock Option Plans (Tables)

3 Months Ended

Mar. 31, 2026

Share-Based Payment Arrangement [Abstract]

Stock Option Granted and Stock Option Compensation Expense

Stock option grants and compensation expense (in millions):

			Three-month period ended March 31
			2026						2025
Grant date			March 1, 2026						March 1, 2025
Stock options granted			1.5						0.8
Stock option compensation expense			$	20					$	18

Black-Scholes Option Pricing Model with Weighted Average

Fair value of stock options at the date of grant is estimated using the Black-Scholes model with the following weighted average assumptions:

			Three-month period ended March 31
			2026						2025
Expected dividend yield			1.2		%				0.8		%
Expected risk-free interest rate			3.6		%				4.1		%
Volatility			22.3		%				25.4		%
Expected life (in years)			5.5						5.5

Stock Option Activity and Related Information

The following is a summary of our stock option activity and related information for 2026 (in millions, except exercise price and year data):

			Three-month period ended March 31, 2026
			Shares Under Option						Weighted Average Exercise Price						Weighted Average Remaining Contractual Term (in years)						Aggregate Intrinsic Value
Beginning balance			6.7						$	177.48
Granted			1.5						228.20
Exercised			(0.5)						95.43
Forfeited or canceled			(0.1)						187.95
Ending balance			7.6						$	192.31					4.07						$	323
Exercisable at end of period			3.1						$	132.32					2.22						$	259
Ending unvested and expected to vest			4.1						$	231.76					5.25						$	61

Other Information Regarding Stock Options Outstanding and Exercisable

Options outstanding and exercisable at March 31, 2026 (in millions, except exercise price and year data):

																		Options Outstanding																		Options Exercisable
Range of Exercise Prices																		Number Outstanding						Weighted Average Remaining Contractual Term (in years)						Weighted Average Exercise Price						Number Exercisable						Weighted Average Exercise Price
$	86.17					—						$	86.17					0.7						0.95						$	86.17					0.7						$	86.17
127.90						—						127.90						1.1						1.96						127.90						1.1						127.90
156.85						—						156.85						0.7						2.84						156.85						0.4						156.85
158.56						—						161.14						0.9						2.96						158.64						0.6						158.57
177.09						—						202.13						1.0						3.96						177.71						0.3						177.09
228.20						—						228.20						1.5						6.92						228.20						—						—
238.88						—						243.54						0.9						4.92						243.54						—						—
337.74						—						347.44						0.8						5.92						337.75						—						—
$	86.17					—						$	347.44					7.6						4.07						$	192.31					3.1						$	132.32

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Tabular disclosure of share-based payment arrangement.

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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