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Supplemental Cash Flow Information (Details) (USD $)	6 Months Ended
Supplemental Cash Flow Information (Details) (USD $)	Jun. 30, 2013	Jun. 30, 2012
Supplemental Cash Flow Information
United States federal, state and foreign income taxes paid for continuing operations	$ 800,000,000	$ 1,300,000,000
Interest Paid	$ 122,000,000	$ 95,000,000

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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