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Investments (Schedule Of Components Of Restricted Assets) (Detail) - USD ($) $ in Millions | Sep. 30, 2017 | Dec. 31, 2016
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Investments, Debt and Equity Securities [Abstract] |  |
Trust funds | $ 16,391 | $ 13,880
Deposits with U.S. regulatory authorities | 2,361 | 2,203
Deposits with non-U.S. regulatory authorities | 2,294 | 2,191
Assets pledged under repurchase agreements | 1,441 | 1,461
Other pledged assets | 377 | 435
Total restricted assets | $ 22,864 | $ 20,170

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- Definition Restricted assets that are deposits with non-US regulatory authorities. + References No definition available. + Details
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- Definition Restricted assets that are deposits with US regulatory authorities. + References No definition available. + Details
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- Definition Restricted assets that are other pledged assets. + References No definition available. + Details
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- Definition Restricted assets that are trust funds. + References No definition available. + Details
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- Definition The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for repurchase agreements, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=64858031&loc=SL6224234-111729 + Details
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