v2.3.0.15

Indebtedness (Details) (USD $)	1 Months Ended		3 Months Ended	9 Months Ended		6 Months Ended			9 Months Ended
	Sep. 30, 2011 Swap	Aug. 31, 2011	Sep. 30, 2011 Swap	Sep. 30, 2011 Year Swap Segment	Dec. 31, 2010	Jun. 30, 2011 5.75% senior notes maturing on June 2011 [Member]	Sep. 30, 2011 5.75% senior notes maturing on June 2011 [Member]	Sep. 30, 2011 3.2% senior notes maturing on August 15, 2021 [Member]	Sep. 30, 2011 6.5% senior notes maturing on November 2013 [Member]	Sep. 30, 2011 Revolving Credit Facility with commercial bank [Member]	Sep. 30, 2011 Line of credit due two thousand twelve [Member]	Sep. 30, 2011 Line of credit due two thousand thirteen [Member]
Debt Instrument [Line Items]
Repayment of long-term debt				$ 813,000,000		$ 250,000,000			$ 563,000,000
Interest rate on notes							5.75%	3.20%	6.50%
Additional Indebtedness (Textuals) [Abstract]
Committed revolving credit facility										2,500,000,000
Borrowing Under Committed revolving credit facilities										0
Line of credit facility terminated											500,000,000	1,200,000,000
Indebtedness (Textuals) [Abstract]
Face value of new debt issued	3,900,000,000	750,000,000	3,900,000,000	3,900,000,000	3,885,000,000
Number of related interest rate swap agreement	2		2	2
Revolving credit facility committed	5 years
Net proceeds from the offering to redeem		742,000,000
Premium paid in connection with redemption of notes	63,000,000
Extinguishment of debt	40,000,000		(40,000,000)	(40,000,000)
Gain from the termination of interest rate swap agreement	25,000,000
Commercial paper can be issued under commercial paper program				1,000,000,000
Maximum maturity of commercial paper issued				270 days
Commercial paper outstanding	0		0	0
Borrowing Under Committed revolving credit facilities										$ 0

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Line of credit facility terminated.

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Premium on redemption of debt.

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Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Interest rate stated in the contractual debt agreement.

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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment.

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Amount borrowed under the credit facility as of the balance sheet date.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Number of interest rate derivative instruments held by the entity at the reporting date.

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