Basis of Presentation: (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Basis of Presentation:
Noncontrolling interest amounts in income, net of tax	$ 3.6	$ 2.6
Changes in noncontrolling interests	$ (15)	$ (22)

The portion of net Income or Loss attributable to the noncontrolling interest (if any) deducted in order to derive the portion attributable to the parent.

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+ Details