Long-Term Debt (Based on Stated Maturity Dates Rather than Early Redemption Dates that Could be Elected by Instrument Holders) (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Feb. 23, 2024	Aug. 31, 2022	Aug. 31, 2021
Debt Instrument [Line Items]
Debt repurchased value	$ 144		$ 154	$ 39
Eagle Solar, LLC | 4.82%, due 2042
Debt Instrument [Line Items]
Debt repurchased value		$ 279