Supplemental Cash Flow Information (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Supplemental Cash Flow Information
United States federal, state and foreign income taxes paid for continuing operations	$ 1,300,000,000	$ 1,800,000,000
Interest Paid	$ 215,000,000	$ 167,000,000