Indebtedness (Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Including Current Maturities	$ 26,752	$ 25,278
Less current portion of long-term debt	1,357	1,255
Long-term Debt	25,395	24,023
U.S. Dollar Notes [Member]
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Including Current Maturities	15,265	16,500
Due through	2043
Interest rate, minimum	0.277%
Interest rate, maximum	6.375%
Interest rate, average	3.877%
Euro Notes [Member] \| Foreign Currency Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Including Current Maturities	9,556	7,303
Due through	2033
Interest rate, minimum	1.75%
Interest rate, maximum	5.875%
Interest rate, average	3.104%
Swiss Franc Notes [Member] \| Foreign Currency Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Including Current Maturities	1,757	1,289
Due through	2024
Interest rate, minimum	0.75%
Interest rate, maximum	2.00%
Interest rate, average	1.217%
Other [Member] \| Foreign Currency Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Including Current Maturities	$ 174	$ 186
Due through	2024
Interest rate, average	3.716%

The average effective interest rate during the reporting period.

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

-Publisher FASB

-Name Accounting Standards Codification

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Maximum contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

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Minimum contractual interest rate for funds borrowed, under the debt agreement.

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

-Publisher SEC

-Name Regulation S-X (SX)

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Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

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

-Publisher SEC

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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Amount of long-term debt and capital lease obligations including current maturities.

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