Revenue (Tables)

12 Months Ended

Dec. 31, 2023

Disaggregation of Revenue [Line Items]

Contract Balances

Contract balances

Contract balances include work in process and customer advances, which primarily consist of advance billings to customers in accordance with the terms of the client contracts, primarily for the reimbursement of third-party costs.

	December 31,
	2023		2022
Work in process:
Media and production costs	$	664.4	$	725.1
Unbilled fees and costs and contract assets	678.1		529.5
Work in process	$	1,342.5	$	1,254.6
Customer advances	$	1,356.2	$	1,492.3

Geographic Markets [Member]

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

Revenue by geographic market:

	Year Ended December 31,
	2023		2022		2021
Americas:
North America	$	7,951.0	$	7,856.0	$	7,709.7
Latin America	386.8		329.0		296.1
EMEA:
Europe	4,266.9		4,010.5		4,219.6
Middle East and Africa	309.6		346.7		267.6
Asia-Pacific	1,777.9		1,746.9		1,796.4
Revenue	$	14,692.2	$	14,289.1	$	14,289.4

Discipline [Member]

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

Revenue by discipline:

	Year Ended December 31,
	2023		2022		2021
Advertising & Media	$	7,891.2	$	7,433.9	$	7,966.2
Precision Marketing	1,473.5		1,426.6		1,205.2
Commerce & Branding	853.7		848.1		802.2
Experiential	651.4		635.6		536.0
Execution & Support	880.8		1,069.9		1,115.9
Public Relations	1,578.9		1,552.7		1,398.2
Healthcare	1,362.7		1,322.3		1,265.7
Revenue	$	14,692.2	$	14,289.1	$	14,289.4