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Background and Basis of Presentation (Equity Method Investment) (Narrative) (Details) - SABMiller Plc [Member] - £ / shares
Oct. 13, 2015
Sep. 30, 2015
Schedule of Equity Method Investments [Line Items]    
Equity method investment, ownership percentage (approximately)   27.00%
Subsequent Event [Member]    
Schedule of Equity Method Investments [Line Items]    
British pounds in cash for each SABMiller share offered by AB InBev £ 44  
Partial share alternative percentage (approximately) 41.00%