Commitments and Contingencies - Narrative (Details) $ in Millions		1 Months Ended			12 Months Ended
	Sep. 12, 2023 claim	Apr. 30, 2023 USD ($)	Mar. 31, 2021 USD ($)	Feb. 28, 2021 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
Loss Contingencies [Line Items]
Net benefit liability recognized for pension and other postretirement benefit plans					$ 309
Legal settlement costs					24	$ 894	$ 6
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
Loss contingency, new claims filed, number | claim	2
U.K. Newspaper Matters Indemnity
Loss Contingencies [Line Items]
Liability related to indemnity					$ 65	$ 115