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Summarized Financial Information of Unconsolidated Affiliate Level 4 (Details) - HAI Balance Sheets - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
HAI Summarized Financial Information [Line Items]    
Current Assets $ 29 $ 38
Non-current assets 24 26
Current Liabilities 14 16
Non-current liabilities $ 2 $ 2