Revenue (Tables)

3 Months Ended

Mar. 31, 2021

Disaggregation of Revenue [Line Items]

Work in Process and Contract Liabilities

Work in process and contract liabilities were (in millions):

	March 31, 2021		December 31, 2020		March 31, 2020
Work in process:
Contract assets and unbilled fees and costs	$	626.0	$	501.1	$	783.7
Media and production costs	512.7		600.1		529.5
	$	1,138.7	$	1,101.2	$	1,313.2
Contract liabilities:
Customer advances	$	1,278.0	$	1,361.3	$	1,075.7

Geographic Markets [Member]

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

Revenue in our principal geographic markets was (in millions):

	Three Months Ended March 31,
	2021		2020
Americas:
North America	$	1,972.5	$	1,997.3
Latin America	63.2		71.4
EMEA:
Europe	941.0		923.4
Middle East and Africa	50.2		55.5
Asia-Pacific	400.0		359.3
	$	3,426.9	$	3,406.9

Discipline [Member]

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

Revenue by discipline was (in millions):

	Three Months Ended March 31,
	2021		2020
Advertising	$	2,003.7	$	1,933.3
CRM Precision Marketing	269.5		232.0
CRM Commerce and Brand Consulting	214.5		220.9
CRM Experiential	88.4		131.3
CRM Execution & Support	246.6		273.7
Public Relations	317.5		333.7
Healthcare	286.7		282.0
	$	3,426.9	$	3,406.9