Consolidated Statement of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Consolidated Statement of Comprehensive Income
Foreign currency translation, tax (expense)/benefit	$ 17	$ 63
Current year actuarial gain (loss), tax (expense)/benefit	(6)	0
Amortization of actuarial (gain) loss, tax (expense)/benefit	(60)	(53)
Current year prior service credit (cost), tax (expense)/benefit	2	0
Amortization of prior service (credit) cost, tax (expense)/benefit	4	3
Amortization of transition (asset) obligation, tax (expense)/benefit	0	0
Derivative financial instruments, Gains (losses) deferred, tax (expense)/benefit	16	(10)
Derivative financial instruments, (Gains) losses reclassified to earnings, tax (expense)/benefit	1	5
Available-for-sale securities, Gains (losses) deferred, tax (expense)/benefit	(9)	(3)
Available-for-sale securities, (Gains) losses reclassified to earnings, tax (expense)/benefit	$ 0	$ 0

Tax effect on the accumulated change in the value of either the projected benefit obligation or plan assets resulting from experience different from that assumed or from a change in an actuarial assumption that has not been recognized in net periodic benefit cost.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 25

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 12

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

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Tax effect of the adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into functional currency of the reporting entity. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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Tax effect on adjustment out of other comprehensive income for prior service costs recognized as a component of net period benefit cost during the period.

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-Name Accounting Standards Codification

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-Number 130

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