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CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Consolidated Statements of Income (Parenthetical) [Abstract]
Capitalized interest	$ 18	$ 12

X

- Definition

Consolidated Statements of Income (Parenthetical)

+ References

No definition available.

+ Details

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Namespace Prefix:	oke_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of interest capitalized during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

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Balance Type:	debit
Period Type:	duration