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Earnings per share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income (Numerator):
Net income for basic and diluted EPS	$ 6,552	$ 5,893	$ 7,264
Shares (Denominator):
Weighted-average shares for basic EPS	538	570	586
Effect of dilutive securities (in shares)	3	3	4
Weighted-average shares for diluted EPS	541	573	590
Basic EPS (in usd per share)	$ 12.18	$ 10.34	$ 12.40
Diluted EPS (in usd per share)	$ 12.11	$ 10.28	$ 12.31

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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Period Type:	duration

X

- References

No definition available.

+ Details

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- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e1448-109256

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