Total stock value repurchased since inception of the stock repurchase plan.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Number of shares issued during the period as a result of the conversion of convertible securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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The gross value of stock issued during the period upon the conversion of convertible securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

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Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

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Number of shares that have been repurchased and retired during the period.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Shareholders Equity (Details - Textuals) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Nov. 19, 2015
Debt Conversion [Line Items]
Conversion of convertible debentures	$ 4	$ 0
Conversion of convertible debentures, shares	0.4
Share Repurchases
Repurchases of stock	$ 301
Less than [Member]
Debt Conversion [Line Items]
Conversion of convertible debentures		$ 1
Conversion of convertible debentures, shares		0.1
Common Stock
Debt Conversion [Line Items]
Conversion of convertible debentures	$ 0
Conversion of convertible debentures, shares	1.0
Share Repurchases
Repurchases of stock	$ 0
Repurchases of stock, shares	13.0
Common Stock \| November 2015 Plan
Share Repurchases
Repurchases of stock, authorized amount			$ 800
Repurchases of stock	$ 301
Repurchases of stock, shares	13.1
Repurchase of stock, aggregate amount	$ 351
Repurchases of stock, remaining authorized amount	$ 449