Financing Arrangements and Derivative Financial Instruments (Credit Arrangements - Narrative) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013
Debt Instrument [Line Items]
Credit Arrangements	$ 9,204
Debt Instrument, Unused Borrowing Capacity, Amount	2,289
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	38.00%
Average Variable Interest Rate For All Variable Rate Credit Arrangements	5.46%
Long-term Debt
Debt Instrument [Line Items]
Credit Arrangements	8,677
Debt Instrument, Unused Borrowing Capacity, Amount	1,869
Short-term Debt [Member]
Debt Instrument [Line Items]
Credit Arrangements	527
Debt Instrument, Unused Borrowing Capacity, Amount	$ 420

Average Variable Interest Rate For All Variable Rate Credit Arrangements.

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- Definition

Credit Arrangements.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Details

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- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Subparagraph b

-Article 5

+ Details

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

+ Details

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