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Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2011	Jun. 30, 2007	Jun. 30, 2006	Jun. 30, 2004
Income Taxes
Effective rate	31.40%	27.00%	30.30%	27.00%	33.00%
Number of separate tax assessments			3
Tax assessment received consisting of tax, penalty, and interest, from the Brazilian Federal Revenue Service ("BFRS")						$ 80	$ 19	$ 465
Estimated further assessments that could be received from the BFRS for tax years after 2007			$ 97

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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