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Restructuring Costs (Schedule Of The Components Of Restructuring Costs Included In The Consolidated Statements Of Earnings) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]        
Restructuring costs $ 2 $ 4 $ 44 $ 50
Employee Related And Other Costs [Member] | Canada Divestiture [Member]
       
Restructuring Cost and Reserve [Line Items]        
Restructuring costs 2   44  
Lease Obligations And Other [Member] | Office Consolidation [Member]
       
Restructuring Cost and Reserve [Line Items]        
Restructuring costs   $ 4   $ 50