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Investments (Schedule Of Components Of Restricted Assets) (Detail) - Asset Pledged as Collateral without Right - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
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Investments [Line Items] |  |
Trust funds | $ 8,438 | $ 8,170
Assets pledged under repurchase agreements | 3,132 | 2,890
Deposits with U.S. regulatory authorities | 2,540 | 2,487
Deposits with non-U.S. regulatory authorities and other | 4,407 | 4,659
Total restricted assets | $ 18,517 | $ 18,206

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- Definition The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 + Details
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