Capital Stock - Schedule of Share Repurchases (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025
Class of Stock Disclosures [Abstract]
Shares repurchased (in shares)	5.2	6.1
Average price per share (in dollars per share)	$ 324.88	$ 353.83
Aggregate cost	$ 1,688	$ 2,134
Authorization remaining at the end of the period	$ 5,007	$ 7,166

Number of shares that have been repurchased and retired during the period.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
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-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
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Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
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-Name Accounting Standards Codification
-Section S50
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-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-11

+ Details

- Definition

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

+ References

+ Details