Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	1 Months Ended			12 Months Ended
	Apr. 30, 2023	Mar. 31, 2021	Feb. 28, 2021	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Loss Contingencies [Line Items]
Net benefit liability recognized for pension and other postretirement benefit plans				$ 374
Legal settlement costs				894	$ 0	$ 0
Smartmatic
Loss Contingencies [Line Items]
Loss contingency, damages sought, value			$ 2,700
Dominion
Loss Contingencies [Line Items]
Loss contingency, damages sought, value		$ 1,600
Legal settlement costs	$ 800
U.K. Newspaper Matters Indemnity
Loss Contingencies [Line Items]
Liability related to indemnity				$ 115	$ 65