Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total revenues	$ 12,640	$ 11,761	$ 9,903
Transaction-based expenses	2,709	2,482	1,915
Total revenues, less transaction-based expenses	9,931	9,279	7,988
Other operating expenses	3,372	3,329	2,810
Depreciation and amortization	1,560	1,537	1,215
Acquisition-related transaction and integration costs	70	104	269
Total operating expenses	5,002	4,970	4,294
Operating income	4,929	4,309	3,694
Total other income/(expense), net	(583)	(681)	(800)
Income before income tax expense	4,346	3,628	2,894
Exchanges
Segment Reporting Information [Line Items]
Total revenues	8,120	7,441	6,355
Transaction-based expenses	2,709	2,482	1,915
Total revenues, less transaction-based expenses	5,411	4,959	4,440
Other operating expenses	1,172	1,063	1,033
Depreciation and amortization	255	260	248
Acquisition-related transaction and integration costs	2	0	0
Total operating expenses	1,429	1,323	1,281
Operating income	3,982	3,636	3,159
Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	2,419	2,298	2,231
Transaction-based expenses	0	0	0
Total revenues, less transaction-based expenses	2,419	2,298	2,231
Other operating expenses	1,140	1,129	1,079
Depreciation and amortization	344	326	341
Acquisition-related transaction and integration costs	2	0	0
Total operating expenses	1,486	1,455	1,420
Operating income	933	843	811
Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	2,101	2,022	1,317
Transaction-based expenses	0	0	0
Total revenues, less transaction-based expenses	2,101	2,022	1,317
Other operating expenses	1,060	1,137	698
Depreciation and amortization	961	951	626
Acquisition-related transaction and integration costs	66	104	269
Total operating expenses	2,087	2,192	1,593
Operating income	14	(170)	(276)
Energy futures and options
Segment Reporting Information [Line Items]
Total revenues	2,182	1,876	1,498
Energy futures and options \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	2,182	1,876	1,498
Energy futures and options \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Energy futures and options \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Agricultural and metals futures and options
Segment Reporting Information [Line Items]
Total revenues	233	257	271
Agricultural and metals futures and options \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	233	257	271
Agricultural and metals futures and options \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Agricultural and metals futures and options \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Financial futures and options
Segment Reporting Information [Line Items]
Total revenues	608	559	460
Financial futures and options \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	608	559	460
Financial futures and options \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Financial futures and options \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Cash equities and equity options
Segment Reporting Information [Line Items]
Total revenues	3,176	2,913	2,298
Cash equities and equity options \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	3,176	2,913	2,298
Cash equities and equity options \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Cash equities and equity options \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	0	0	0
OTC and other
Segment Reporting Information [Line Items]
Total revenues	395	400	398
OTC and other \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	395	400	398
OTC and other \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	0	0	0
OTC and other \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Data and connectivity services
Segment Reporting Information [Line Items]
Total revenues	1,031	947	933
Data and connectivity services \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	1,031	947	933
Data and connectivity services \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Data and connectivity services \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Listings
Segment Reporting Information [Line Items]
Total revenues	495	489	497
Listings \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	495	489	497
Listings \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Listings \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Fixed income execution
Segment Reporting Information [Line Items]
Total revenues	125	117	124
Fixed income execution \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Fixed income execution \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	125	117	124
Fixed income execution \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	0	0	0
CDS clearing
Segment Reporting Information [Line Items]
Total revenues	338	343	360
CDS clearing \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	0	0	0
CDS clearing \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	338	343	360
CDS clearing \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Fixed income data and analytics
Segment Reporting Information [Line Items]
Total revenues	1,234	1,177	1,118
Fixed income data and analytics \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Fixed income data and analytics \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	1,234	1,177	1,118
Fixed income data and analytics \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Data and network technology
Segment Reporting Information [Line Items]
Total revenues	722	661	629
Data and network technology \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Data and network technology \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	722	661	629
Data and network technology \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Origination technology
Segment Reporting Information [Line Items]
Total revenues	738	713	694
Origination technology \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Origination technology \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Origination technology \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	738	713	694
Closing solutions
Segment Reporting Information [Line Items]
Total revenues	223	202	179
Closing solutions \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Closing solutions \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Closing solutions \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	223	202	179
Servicing software
Segment Reporting Information [Line Items]
Total revenues	871	848	288
Servicing software \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Servicing software \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Servicing software \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	871	848	288
Data and analytics
Segment Reporting Information [Line Items]
Total revenues	269	259	156
Data and analytics \| Exchanges
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Data and analytics \| Fixed Income and Data Services
Segment Reporting Information [Line Items]
Total revenues	0	0	0
Data and analytics \| Mortgage Technology
Segment Reporting Information [Line Items]
Total revenues	$ 269	$ 259	$ 156

Intercontinental Exchange, Inc. 10-K