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Commitments and Contingencies (Detail) $ in Millions		1 Months Ended			3 Months Ended
Commitments and Contingencies (Detail) $ in Millions	Sep. 12, 2023 claim	Apr. 30, 2023 USD ($)	Mar. 31, 2021 USD ($)	Feb. 28, 2021 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)
Loss Contingencies [Line Items]
Total firm commitments and future debt payments					$ 39,000		$ 38,000
Legal settlement costs					7	$ 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
Loss contingency, new claims filed, number \| claim	2
U.K. Newspaper Matters Indemnity
Loss Contingencies [Line Items]
Liability related to indemnity					$ 70		$ 65