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Capital Stock (Tables)
 12 Months Ended
Dec. 31, 2025
Class of Stock Disclosures [Abstract]  
Summary of Stock Option Activity
A summary of stock option activity for the year ended December 31, 2025 is as follows:
Number of
Shares		Weighted-Average
Option Price
per Share		Weighted-Average
Remaining
Contractual Life
(Years)		Aggregate
Intrinsic
Value
Outstanding at January 1, 20252.9 $361.36 5.58$166 
Granted0.6 393.99 
Exercised(0.2)218.66 
Forfeited or expired(0.2)439.71 
Outstanding at December 31, 20253.1 373.90 5.65$107 
Exercisable at December 31, 20252.0 343.88 4.33$106 
Summary of Nonvested Restricted Stock Activity Including Restricted Stock Units
A summary of the status of nonvested restricted stock activity, including restricted stock units and performance units, for the year ended December 31, 2025 is as follows:
Restricted
Stock Shares
and Units		Weighted-Average
Grant Date
Fair Value
per Share
Nonvested at January 1, 20251.0 $478.70 
Granted0.6 392.54 
Vested(0.4)466.99 
Forfeited(0.1)448.58 
Nonvested at December 31, 20251.1 437.32 
Summary of Weighted-Average Assumptions Used to Estimate the Fair Value of Options Granted During the Periods
The following weighted-average assumptions were used to estimate the fair values of options granted during the years ended December 31, 2025, 2024 and 2023:
202520242023
Risk-free interest rate4.29 %4.28 %3.95 %
Volatility factor30.00 %28.00 %29.00 %
Dividend yield (annual)1.71 %1.31 %1.30 %
Weighted-average expected life (years)4.454.404.40
Schedule of Weighted-Average Fair Values Determined for the Periods
The following weighted-average fair values per share were determined for the years ended December 31, 2025, 2024 and 2023:
202520242023
Options granted during the year$106.84 $134.61 $126.90 
Restricted stock awards granted during the year392.54 501.78 467.79 
Summary of Cash Dividend Activity
A summary of the cash dividend activity for the years ended December 31, 2025 and 2024 is as follows:
Declaration DateRecord DatePayment DateCash Dividend
per Share		Total
Year ended December 31, 2025
January 22, 2025March 10, 2025March 25, 2025$1.71 $386 
April 16, 2025June 10, 2025June 25, 20251.71 385 
July 16, 2025September 10, 2025September 25, 20251.71 381 
October 15, 2025December 5, 2025December 19, 20251.71 377 
Year ended December 31, 2024
January 23, 2024March 8, 2024March 22, 2024$1.63 $379 
April 16, 2024June 10, 2024June 25, 20241.63 378 
July 16, 2024September 10, 2024September 25, 20241.63 378 
October 15, 2024December 5, 2024December 20, 20241.63 373 
Summary of Share Repurchases
A summary of common stock repurchases for the years ended December 31, 2025 and 2024 is as follows:
Years Ended December 31
 20252024
Shares repurchased7.4 6.7 
Average price per share$350.39 $435.32 
Aggregate cost - excluding excise tax
$2,605 $2,900 
Authorization remaining at end of year$6,695 $9,300