Business Combinations, Goodwill and Acquired Intangible - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Goodwill [Line Items]
Increase (decrease) in revenue	$ 74
Reduction in revenue from wind-down of pandemic-related contracts	83
Business Processing [Member]
Goodwill [Line Items]
Increase (decrease) in revenue	$ (9)