Supplemental financial information - Treasury Stock (Details) shares in Millions	3 Months Ended
Mar. 31, 2026 shares
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, beginning (in shares)	834
Balance, ending (in shares)	831
Treasury Common Stock
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, beginning (in shares)	834
Repurchases (in shares)	1
Shares issued for stock compensation (in shares)	(4)
Balance, ending (in shares)	831

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

+ References

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-Name Accounting Standards Codification
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-Publisher FASB
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- Definition

Number of previously issued common shares repurchased by the issuing entity and held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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