Contingencies (Details) $ in Millions	1 Months Ended
	Mar. 31, 2024 USD ($) classAction	Aug. 31, 2021 plaintiff	May 31, 2021 participant	Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items]
Accrual of loss contingency	$ 20
Estimate of possible loss	40
Participants who filed a purported class action complaint | participant			8
Unrecognized tax benefits	$ 237			$ 237
Edmar v Currenex
Loss Contingencies [Line Items]
Loss contingency, number of plaintiffs | plaintiff		2
Piercy v AT&T And Schloss v AT&T
Loss Contingencies [Line Items]
Number of class actions filed | classAction	2