CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues
Total revenues (Note K)	$ 7,887	$ 4,894	$ 15,930	$ 9,675
Cost of sales and fuel (exclusive of items shown separately below)	5,360	2,891	11,015	5,788
Operations and maintenance	618	486	1,273	969
Depreciation and amortization	368	262	748	516
General taxes	88	83	185	169
Transaction costs (Note B)	22	4	64	7
Other operating income, net	0	(61)	(6)	(67)
Operating income	1,431	1,229	2,651	2,293
Equity in net earnings from investments (Note I)	81	88	189	164
Other income, net	39	4	41	11
Interest expense	(438)	(298)	(880)	(598)
Income before income taxes	1,113	1,023	2,001	1,870
Income taxes	(260)	(243)	(457)	(451)
Net income	853	780	1,544	1,419
Less: Net income attributable to noncontrolling interests	(12)	0	(67)	0
Net income attributable to ONEOK	$ 841	$ 780	$ 1,477	$ 1,419
Basic EPS (Note H) (in dollars per share)	$ 1.34	$ 1.33	$ 2.38	$ 2.43
Diluted EPS (Note H) (in dollars per share)	$ 1.34	$ 1.33	$ 2.38	$ 2.42
Average shares (millions)
Basic (in shares)	627.2	584.6	619.3	584.4
Diluted (in shares)	628.1	585.8	620.3	585.7
Commodity sales
Revenues
Total revenues (Note K)	$ 6,726	$ 3,994	$ 13,638	$ 7,922
Services and other
Revenues
Total revenues (Note K)	$ 1,161	$ 900	$ 2,292	$ 1,753