Goodwill and Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Changes in Net Carrying Amount of Goodwill

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

	Employer			Professional
	Solutions			Services			Total
Balance as of December 31, 2021	$	3,564			74			3,638
Acquisitions(1)		44			—			44
Foreign currency translation		(2	)		(1	)		(3	)
Balance as of December 31, 2022	$	3,606			73			3,679

(1) Amounts relate to the 2022 Acquisition and measurement period adjustments related to prior year acquisitions. See Note 4 "Acquisitions" for more information.

Schedule of Intangible Assets by Asset Class

Intangible assets by asset class are as follows (in millions):

	December 31, 2022						December 31, 2021
	Gross				Net		Gross				Net
	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Amount		Amortization		Amount		Amount		Amortization		Amount
Intangible assets:
Customer-related and contract based    intangibles	$	3,670	$	364	$	3,306	$	3,662	$	119	$	3,543
Technology related intangibles		263		63		200		254		20		234
Trade name (finite life)		408		42		366		407		14		393
Total	$	4,341	$	469	$	3,872	$	4,323	$	153	$	4,170

Schedule of Intangible Asset Net Carrying Amount and Weighted Average Remaining Useful Lives

The following table reflects intangible asset net carrying amount and weighted average remaining useful lives as of December 31, 2022 (in millions, except for years):

	Net		Weighted-Average
	Carrying		Remaining
	Amount		Useful Lives
Intangible assets at December 31, 2022:
Customer-related and contract-based    intangibles	$	3,306		13.5
Technology-related intangibles		200		4.5
Trade name (finite life)		366		13.3
Total	$	3,872

Schedule of Intangible Assets Expected Annual Amortization Expense

Subsequent to December 31, 2022, the annual amortization expense is expected to be as follows (in millions):

	Customer-Related		Technology		Trade
	and Contract Based		Related		Name
	Intangibles		Intangibles		Intangibles
2023	$	246	$	45	$	29
2024		246		45		29
2025		246		45		28
2026		246		44		27
2027		246		21		27
Thereafter		2,076		—		226
Total amortization expense	$	3,306	$	200	$	366