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Investments in Unconsolidated Subsidiaries - (Balance sheet and earnings activity) (Details) (Eastern Europe Middle East And Africa [Member], Equity Method Investments [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2014
Dec. 31, 2013
Eastern Europe Middle East And Africa [Member] | Equity Method Investments [Member]
     
Schedule of Equity Method Investments [Line Items]      
Net revenues $ 1,420 $ 2,606  
Receivables 584 584 470
Notes receivable 102 102 100
Other liabilities $ 90 $ 90 $ 86