BUSINESS SEGMENTS (Tables)

12 Months Ended

Dec. 31, 2024

Segment Reporting [Abstract]

Summary of Segment Revenue, Segment Expenses, and Segment Profits

The following tables present our revenues (disaggregated by segment and major revenue stream), segment expenses, and segment profits for each of the last three fiscal years:

	2024
(in millions)	U.S. & Canada		EMEA		Greater China		APEC
Gross fee revenues	$	2,951	$	589	$	250	$	345
Contract investment amortization	(76)		(14)		(1)		(5)
Net fee revenues	2,875		575		249		340
Owned, leased, and other revenue	437		595		27		141
Cost reimbursement revenue	15,300		1,236		306		495
Total reportable segment revenue	18,612		2,406		582		976
Less:
Owned, leased, and other - direct	330		499		14		118
Depreciation, amortization, and other	84		38		9		8
General, administrative, and other	182		110		55		64
Reimbursed expenses	15,381		1,252		319		510
Other segment items (primarily non-operating income and expenses)	(5)		(5)		(1)		(4)
Total reportable segment profit	$	2,640	$	512	$	186	$	280

	2023
(in millions)	U.S. & Canada		EMEA		Greater China		APEC
Gross fee revenues	$	2,799	$	529	$	265	$	288
Contract investment amortization	(65)		(13)		—		(4)
Net fee revenues	2,734		516		265		284
Owned, leased, and other revenue	506		574		18		135
Cost reimbursement revenue	14,456		1,178		317		411
Total reportable segment revenue	17,696		2,268		600		830
Less:
Owned, leased, and other - direct	340		481		12		116
Depreciation, amortization, and other	84		40		10		9
General, administrative, and other	154		140		55		61
Reimbursed expenses	14,399		1,168		317		409
Other segment items (primarily non-operating income and expenses)	(5)		(2)		(2)		(8)
Total reportable segment profit	$	2,724	$	441	$	208	$	243

	2022
(in millions)	U.S. & Canada		EMEA		Greater China		APEC
Gross fee revenues	$	2,486	$	455	$	120	$	181
Contract investment amortization	(60)		(17)		—		(3)
Net fee revenues	2,426		438		120		178
Owned, leased, and other revenue	479		481		17		97
Cost reimbursement revenue	12,848		1,010		214		289
Total reportable segment revenue	15,753		1,929		351		564
Less:
Owned, leased, and other - direct	386		369		14		99
Depreciation, amortization, and other	81		45		12		9
General, administrative, and other	135		103		50		48
Reimbursed expenses	12,714		979		210		281
Other segment items (primarily non-operating income and expenses)	(9)		(2)		3		(7)
Total reportable segment profit	$	2,446	$	435	$	62	$	134

Reconciliation of Total Segment Revenue and Profit to Consolidated Revenue and Profit

The following table presents reconciliations of our total reportable segment revenue and profit to consolidated revenue and income before income taxes for each of the last three fiscal years:

(in millions)	2024		2023		2022
Reconciliation of revenue
Total reportable segment revenue	$	22,576	$	21,394	$	18,597
Unallocated corporate and other	2,524		2,319		2,176
Consolidated revenue	$	25,100	$	23,713	$	20,773
Reconciliation of income before income taxes
Total reportable segment profit	$	3,618	$	3,616	$	3,077
Unallocated corporate and other	188		297		414
Interest expense, net of interest income	(655)		(535)		(377)
Consolidated income before income taxes	$	3,151	$	3,378	$	3,114