Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	$ 19,424	$ 19,285
Acquisitions	268	104
Reclassifications	(15)
Other	(39)	35
Ending balance	19,638	19,424	$ 19,285
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, beginning balance	2,872	1,825
Current year amortization	1,077	1,042	905
Reclassifications	(13)	0
Other	(8)	5
Accumulated amortization, ending balance	3,928	2,872	1,825
Net definite-lived intangibles	15,710	16,552
Databases and software
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	3,942	3,941
Acquisitions	0	0
Reclassifications	(15)
Other	0	1
Ending balance	3,927	3,942	3,941
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, beginning balance	1,116	765
Current year amortization	350	351
Reclassifications	(13)	0
Other	0	0
Accumulated amortization, ending balance	1,453	1,116	765
Net definite-lived intangibles	2,474	2,826
Content
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	139	139
Acquisitions	0	0
Reclassifications	0
Other	0	0
Ending balance	139	139	139
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, beginning balance	139	139
Current year amortization	0	0
Reclassifications	0	0
Other	0	0
Accumulated amortization, ending balance	139	139	139
Net definite-lived intangibles	0	0
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	13,490	13,467
Acquisitions	0	0
Reclassifications	0
Other	(25)	23
Ending balance	13,465	13,490	13,467
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, beginning balance	1,198	656
Current year amortization	542	545
Reclassifications	0	(2)
Other	(3)	(1)
Accumulated amortization, ending balance	1,737	1,198	656
Net definite-lived intangibles	11,728	12,292
Tradenames
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	1,528	1,524
Acquisitions	0	0
Reclassifications	0
Other	(7)	4
Ending balance	1,521	1,528	1,524
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, beginning balance	256	142
Current year amortization	111	111
Reclassifications	0	2
Other	(1)	1
Accumulated amortization, ending balance	366	256	142
Net definite-lived intangibles	1,155	1,272
Other intangibles
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	325	214
Acquisitions	268	104
Reclassifications	0
Other	(7)	7
Ending balance	586	325	214
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, beginning balance	163	123
Current year amortization	74	35
Reclassifications	0	0
Other	(4)	5
Accumulated amortization, ending balance	233	163	$ 123
Net definite-lived intangibles	$ 353	$ 162