This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP).

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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

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Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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The change in equity as a result of a spin-off transaction (a regular or reverse spin-off) which is based on the recorded amounts.

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Gross value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity
Balance as of beginning of period			$ 18,095	$ 16,445
Net income (loss)	324	673	1,441	1,071
Dividends			(342)	(263)
Stock-based compensation expense			31	29
Tax deduction in excess of stock-based compensation expense			31	16
Transactions in connection with stock-based compensation plans:
Stock issuances			47	36
Separation of retail business			(479)	0
Contributions from noncontrolling interests			45	34
Other comprehensive income	182	133	134	156
Balance as of end of period	18,387	17,386	18,387	17,386
Share Activity
Treasury stock, shares, beginning balance			(121,406,520)
Treasury stock, shares, ending balance	(131,876,124)		(131,876,124)
Shares Purchased Related To Stock-Based Compensation Plans [Member]
Transactions in connection with stock-based compensation plans:
Stock repurchases			(220)	(138)
Shares Purchased Under Programs [Member]
Transactions in connection with stock-based compensation plans:
Stock repurchases			(396)	0
Parent [Member]
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity
Balance as of beginning of period			18,032	16,423
Net income (loss)			1,432	1,073
Dividends			(342)	(263)
Stock-based compensation expense			31	29
Tax deduction in excess of stock-based compensation expense			31	16
Transactions in connection with stock-based compensation plans:
Stock issuances			47	36
Separation of retail business			(479)	0
Contributions from noncontrolling interests			0	0
Other comprehensive income			134	156
Balance as of end of period	18,270	17,332	18,270	17,332
Parent [Member] \| Shares Purchased Related To Stock-Based Compensation Plans [Member]
Transactions in connection with stock-based compensation plans:
Stock repurchases			(220)	(138)
Parent [Member] \| Shares Purchased Under Programs [Member]
Transactions in connection with stock-based compensation plans:
Stock repurchases			(396)	0
Common Stock [Member]
Share Activity
Common stock, shares, beginning balance			673,000,000	673,000,000
Stock issuances, stock-based compensation			0	0
Common stock, shares, ending balance	673,000,000	673,000,000	673,000,000	673,000,000
Treasury Stock [Member]
Share Activity
Treasury stock, shares, beginning balance			(121,000,000)	(117,000,000)
Stock issuances, stock-based compensation			3,000,000	3,000,000
Treasury stock, shares, ending balance	(132,000,000)	(120,000,000)	(132,000,000)	(120,000,000)
Treasury Stock [Member] \| Shares Purchased Related To Stock-Based Compensation Plans [Member]
Share Activity
Stock repurchases			(5,000,000)	(6,000,000)
Treasury Stock [Member] \| Shares Purchased Under Programs [Member]
Share Activity
Stock repurchases			(9,000,000)	0
Noncontrolling Interest [Member]
Reconciliation of the Beginning and Ending Balances of the Carrying Amounts of Equity
Balance as of beginning of period			63	22
Net income (loss)			9	(2)
Dividends			0	0
Stock-based compensation expense			0	0
Tax deduction in excess of stock-based compensation expense			0	0
Transactions in connection with stock-based compensation plans:
Stock issuances			0	0
Separation of retail business			0	0
Contributions from noncontrolling interests			45	34
Other comprehensive income			0	0
Balance as of end of period	117	54	117	54
Noncontrolling Interest [Member] \| Shares Purchased Related To Stock-Based Compensation Plans [Member]
Transactions in connection with stock-based compensation plans:
Stock repurchases			0	0
Noncontrolling Interest [Member] \| Shares Purchased Under Programs [Member]
Transactions in connection with stock-based compensation plans:
Stock repurchases			$ 0	$ 0