Income Taxes (Details) (USD $) In Millions	3 Months Ended	6 Months Ended
Mar. 31, 2011	Mar. 31, 2010	Jun. 30, 2011	Jun. 30, 2010
Income Taxes Details [Abstract]
Increase to shareholders' net income for change in foreign tax practices			$ 15	$ 20
Effects of permanently investing South Korea earnings Overseas to shareholders' net income			12	11
Effects of permanently investing Hong Kong earnings Overseas to shareholders' net income			3	9
Effects of Hong Kong tax implementation		6
Unrecognized deferred tax liabilities related to investments in South Korean and Hong Kong subsidiaries			69
Decline in gross unrecognized tax benefits			94
Effect of IRS examination to shareholders' net income	24		24
Reduction in net unrecognized tax benefit resulting from IRS examination			11
Income tax expense related to IRS examination	33		33
Pre-tax charge associated with IRS examination			9
Reduction of interest and penalties resulting from IRS examination			11
Unfavorable potential litigation decision			25
Effect of new legislation			$ 4	$ 6

Accumulated deferred tax liability related to the permanently invested foreign earnings.

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The effect of the portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to nondeductible expenses under enacted tax laws, or differences in the methodologies used to determine expense amounts for financial statements prepared in accordance with generally accepted accounting principles, not otherwise listed in the existing taxonomy on shareholders' net income.

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- Definition

Implementation effect of tax strategy in Hong Kong

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- Details

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- Definition

The related tax benefit to shareholders' net income of permanently invested Hong Kong foreign earnings

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- Definition

The related tax benefit to shareholders' net income of permanently invested foreign earnings

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The related tax benefit to shareholders' net income of permanently invested South Korea foreign earnings

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- Definition

The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities recorded in income tax expense.

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The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities recorded as a pre-tax charge.

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- Definition

The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority.

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- Definition

The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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The estimated range of reasonably possible losses resulting from an adverse position taken by a taxing authority.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3

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The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
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The net amount of all increases and decreases in unrecognized tax benefits for the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph a

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