- Definition

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

+ References+ Details

Investment gains/losses - Narrative (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Gain (Loss) on Investments [Line Items]
Investment gains/losses	$ (376)	$ 1,714	$ 3,121	$ 2,711
OTTI losses	678	143	697	228
Equity Securities [Member] \| PSX and GHC [Member] \| PSPI and WPLG Inc. [Member]
Gain (Loss) on Investments [Line Items]
Investment gains/losses			2,100
Equity Securities [Member] \| Tesco PLC [Member]
Gain (Loss) on Investments [Line Items]
OTTI losses	678
Bonds [Member] \| Texas Competitive Electric Holdings [Member]
Gain (Loss) on Investments [Line Items]
OTTI losses				$ 228