Restructuring and Acquisition Charges (Tables)

12 Months Ended

Dec. 31, 2020

Restructuring and Related Activities [Abstract]

Restructuring, Impairment, and Other Activities Disclosure

Restructuring and acquisition charges are presented in table below.

	Year Ended December 31,
(in millions)	2020		2019	2018
Severance and other employment-related charges	$	69.0	31.1	25.5
Restructuring, pre-acquisition and post-acquisition charges	51.5		96.9	5.9
Stock-based compensation expense for HFF retention awards	36.7		28.0	—
Fair value adjustments to earn-out liabilities	(14.8)		28.4	7.4
Restructuring and acquisition charges	$	142.4	184.4	38.8

Restructuring Charges and Related Payment Activity

The following tables show the accrual activity and payments relating to cash-based Restructuring and acquisition charges.

(in millions)	Severance & Employment-Related		Lease Exit	Other Restructuring and Acquisition Costs	Total
December 31, 2017	$	14.2	5.7	1.4		$	21.3
Accruals	25.5		0.7	5.2		31.4
Payments made	(25.7)		(5.8)	(6.1)		(37.6)
December 31, 2018	14.0		0.6	0.5		15.1
Accruals	31.1		11.1	85.8		128.0
Payments made	(20.8)		(3.3)	(82.5)		(106.6)
December 31, 2019	24.3		8.4	3.8		36.5
Accruals	69.0		25.0	26.5		120.5
Payments made	(52.0)		(30.9)	(29.1)		(112.0)
December 31, 2020	$	41.3	2.5	1.2		$	45.0