Description of Business and Summary of Significant Accounting Policies - Narrative (Detail) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) paymentPlan segment shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 shares
Organization And Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments | segment	2
Number of payment plans | paymentPlan	2
Guarantee liability | $	$ 54	$ 77
Restricted stock units outstanding to purchase shares included in diluted earnings per common share (in shares) | shares	1.9	1.7	2.0
Non-Network Internal-Use Software
Organization And Summary Of Significant Accounting Policies [Line Items]
Useful life for finite-lived intangible assets, years	7 years
Fixed Term Plan
Organization And Summary Of Significant Accounting Policies [Line Items]
Contract term	24 months
Device Payment Plan
Organization And Summary Of Significant Accounting Policies [Line Items]
Contract term	36 months