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Share-Based Payments (Compensation Cost And Valuation Assumption) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-Based Payment      
Performance stock units $ 381 $ 397 $ 388
Restricted stock and stock units 80 102 91
Other nonvested stock units (3) 12 4
Other 0 0 6
Total $ 458 $ 511 $ 489