Investments (Schedule Of Cost And Fair Value Of Equity Securities) (Detail) - USD ($) $ in Millions |
Jun. 30, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Investments, Debt and Equity Securities [Abstract] | ||
| Cost | $ 433 | $ 440 |
| Gross unrealized appreciation | 77 | 83 |
| Gross unrealized depreciation | (12) | (13) |
| Fair value | $ 498 | $ 510 |
| X | ||||||||||
- Definition As of the balance sheet date, the excess of fair value over carrying value (amortized cost) of an equity security , exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding gain. No definition available.
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| X | ||||||||||
- Definition As of the balance sheet date, the excess of carrying value (amortized cost) over fair value of an equity security, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding loss. No definition available.
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| X | ||||||||||
- Definition This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. No definition available.
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| X | ||||||||||
- Definition Amount of equity securities categorized neither as held-to-maturity nor as trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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