Goodwill and Intangible Assets, net (Tables)

6 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Goodwill

Changes in goodwill for the six months ended December 31, 2023 are as follows:

	Employer Services		PEO Services		Total
Balance at June 30, 2023	$	2,334.6	$	4.8	$	2,339.4
Additions and other adjustments	27.5		—		27.5
Currency translation adjustments	2.9		—		2.9
Balance at December 31, 2023	$	2,365.0	$	4.8	$	2,369.8

Summary of Components of Finite-Lived Intangible Assets

Components of intangible assets, net, are as follows:

	December 31,		June 30,
	2023		2023
Intangible assets:
Software and software licenses	$	3,673.4	$	3,548.9
Customer contracts and lists	1,162.6		1,140.6
Other intangibles	242.0		241.9
	5,078.0		4,931.4
Less accumulated amortization:
Software and software licenses	(2,559.0)		(2,442.6)
Customer contracts and lists	(964.1)		(907.5)
Other intangibles	(239.8)		(237.7)
	(3,762.9)		(3,587.8)
Intangible assets, net	$	1,315.1	$	1,343.6

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Estimated future amortization expenses of the Company's existing intangible assets are as follows:

	Amount
Six months ending June 30, 2024	$	210.2
Twelve months ending June 30, 2025	$	313.9
Twelve months ending June 30, 2026	$	204.7
Twelve months ending June 30, 2027	$	163.2
Twelve months ending June 30, 2028	$	125.0
Twelve months ending June 30, 2029	$	95.3