Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in the Net Carrying Amount of Goodwill by Operating Segment

The changes in the net carrying amount of goodwill for the six months ended June 30, 2025 are as follows (in millions):

	Risk Capital		Human Capital		Total
Balance as of December 31, 2024	$	8,785	$	6,449	$	15,234
Goodwill related to current year acquisitions	346		16		362
Measurement period adjustments related to prior year acquisitions	(11)		(17)		(28)
Foreign currency translation and other	301		155		456
Balance as of June 30, 2025	$	9,421	$	6,603	$	16,024

Schedule of Other Intangible Assets by Asset Class

Other intangible assets by asset class are as follows (in millions):

	June 30, 2025						December 31, 2024
	Gross Carrying Amount		Accumulated Amortization and Impairment		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization and Impairment		Net Carrying Amount
Customer-related and contract-based	$	8,417	$	2,448	$	5,969	$	7,994	$	2,050	$	5,944
Tradenames	811		96		715		812		66		746
Technology and other	369		320		49		366		313		53
Total	$	9,597	$	2,864	$	6,733	$	9,172	$	2,429	$	6,743

Schedule of Estimated Future Amortization Expense on Intangible Assets

The estimated future amortization for finite-lived intangible assets as of June 30, 2025 is as follows (in millions):

Remainder of 2025	$	403
2026	739
2027	680
2028	625
2029	576
2030	528
Thereafter	3,182
Total	$	6,733