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Supplemental Cash Flow Information (Details) (USD $)
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Supplemental Cash Flow Information    
United States federal, state and foreign income taxes paid for continuing operations $ 1,700,000,000 $ 800,000,000
Tax receivable   400,000,000
Interest Paid $ 110,000,000 $ 122,000,000