NOTE 9. GOODWILL AND INTANGIBLE ASSETS, NET

Changes in goodwill for the fiscal years ended June 30, 2019 and 2018 are as follows:



	Employer Services			PEO Services		Total
Balance at June 30, 2017	$	1,736.2		$	4.8	$	1,741.0
Additions and other adjustments	494.9			—		494.9
Currency translation adjustments	7.6			—		7.6
Balance at June 30, 2018	$	2,238.7		$	4.8	$	2,243.5
Additions and other adjustments	94.3			—		94.3
Currency translation adjustments	(14.8		)	—		(14.8		)
Balance at June 30, 2019	$	2,318.2		$	4.8	$	2,323.0

Components of intangible assets, net, are as follows:



June 30,	2019			2018
Intangible assets:
Software and software licenses	$	2,519.3		$	2,292.9
Customer contracts and lists	860.7			708.6
Other intangibles	237.9			236.5
	3,617.9			3,238.0
Less accumulated amortization:
Software and software licenses	(1,762.3		)	(1,606.6		)
Customer contracts and lists	(566.4		)	(533.4		)
Other intangibles	(217.7		)	(211.6		)
	(2,546.4		)	(2,351.6		)
Intangible assets, net	$	1,071.5		$	886.4

Other intangibles consist primarily of purchased rights, purchased content, trademarks and trade names (acquired directly or through acquisitions). All intangible assets have finite lives and, as such, are subject to amortization. The weighted average remaining useful life of the intangible assets is 6 years (5 years for software and software licenses, 6 years for customer contracts and lists, and 5 years for other intangibles). Amortization of intangible assets was $228.4 million, $204.5 million, and $168.8 million for fiscal 2019, 2018, and 2017, respectively.

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



	Amount
Twelve months ending June 30, 2020	$	275.9
Twelve months ending June 30, 2021	$	220.1
Twelve months ending June 30, 2022	$	173.5
Twelve months ending June 30, 2023	$	139.4
Twelve months ending June 30, 2024	$	110.2