The changes in the net carrying amount of goodwill are as follows (in millions):

	Predecessor
	Employer		Professional
	Solutions		Services		Total
Balance as of December 31, 2020	$	1,985	$	260	$	2,245
Measurement period adjustments		2		—		2
Foreign currency translation		2		1		3
Balance as of June 30, 2021	$	1,989	$	261	$	2,250

The preliminary Successor goodwill at both July 1, 2021 and September 30, 2021 was $3.4 billion and $36 million for Employer Solutions and Professional Services, respectively. Of the preliminary Successor goodwill established during the period, $1.5 billion of the goodwill was tax deductible.

The Company did not identify any impairment for the Successor period from July 1, 2021 to September 30, 2021, nor the Predecessor period December 31, 2020 to June 30, 2021. Goodwill is reviewed for impairment utilizing a qualitative assessment or a quantitative goodwill impairment test and the Company determined that it was more likely than not that no impairment of goodwill existed as of the evaluation date.

	Successor						Predecessor
	September 30, 2021						December 31, 2020
	Gross				Net		Gross
	Carrying		Accumulated		Carrying		Carrying		Accumulated		Net Carrying
	Amount		Amortization		Amount		Amount		Amortization		Amount
Intangible assets:
Customer related and contract based intangibles	$	3,456	$	58	$	3,398	$	2,078	$	486	$	1,592
Technology related intangibles		222		9		213		316		180		136
Trade name (finite life)		400		7		393		8		6		2
Trade name (indefinite life)		—		—		—		3		—		3
Total	$	4,078	$	74	$	4,004	$	2,405	$	672	$	1,733

The net carrying amount of Intangible assets as of September 30, 2021 includes the preliminary fair values for customer related and contract based identifiable intangible assets, technology related intangible assets and tradename assets based on management’s preliminary estimate of fair value (see Note 4 “Acquisitions” for further information).

As a result of the Business Combination, all accumulated amortization previously recorded by the Predecessor was reduced to zero as of July 1, 2021. Amortization expense from finite-lived intangible assets for the Successor three months ended September 30, 2021 and the Predecessor six months ended June 30, 2021 and three and nine months ended September 30, 2020 was $74 million, $100 million, $51 million and $151 million, respectively, which was recorded in Depreciation and intangible amortization in the Condensed Consolidated Statements of Comprehensive Income (Loss).

Subsequent to September 30, 2021, the annual amortization expense is expected to be as follows (in millions):

	Customer Related		Technology		Trade
	and Contract Based		Related		Name
	Intangibles		Intangibles		Intangible
Remainder of 2021 (October - December)	$	58	$	10	$	6
2022		230		37		27
2023		230		37		27
2024		230		37		27
2025		230		37		27
Thereafter		2,420		55		279
Total amortization expense	$	3,398	$	213	$	393