INCOME TAXES - Principal Reasons for Differences and Related Tax Effects where Income Tax Expense Varies from Amount Computed by Applying Expected United States Tax Rate to Pretax Earnings (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Taxes [Line Items]
Income taxes based on U.S. statutory rates, amount	$ 952	$ 1,348	$ 1,105
Income taxes based on U.S. statutory rates, percent	21.00%	21.00%	21.00%
Income taxes	$ 887	$ 974	$ 603
Income taxes, percent	19.60%
U.S.
Income Taxes [Line Items]
Solar tax credits, amount	$ (54)	(164)	(348)
Solar tax credits, percent	(1.20%)
Other tax credits, amount	$ (41)
Other tax credits, percent	(0.90%)
DST functional currency change	$ 23	(208)	(174)
DST functional currency change, percent	0.50%
Other nontaxable and nondeductible items, amount	$ 23
Other nontaxable and nondeductible items, percent	0.50%
U.S. effects of foreign branch, amount	$ (184)
U.S. effects of foreign branch, percent	(4.00%)
Changes in tax law, amount	$ (112)
Changes in tax law, percent	(2.50%)
Other tax effects, amount	$ (19)	$ (2)	$ 20
Other tax effects, percent	(0.40%)
Japan
Income Taxes [Line Items]
Changes in tax law, amount	$ 112
Changes in tax law, percent	2.50%
Other tax effects, amount	$ 3
Other tax effects, percent	0.10%
Rate differential, amount	$ 69
Rate differential, percent	1.50%
Local taxes, amount	$ 151
Local taxes, percent	3.30%
Bermuda
Income Taxes [Line Items]
Rate differential, amount	$ (10)
Rate differential, percent	(0.20%)
Tax credits, amount	$ (26)
Tax credits, percent	(0.60%)