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Condensed Consolidated Financial Statements Condensed Consolidated Financial Statements (Details)
$ in Millions
Apr. 30, 2015
USD ($)
Accounting Standards Update 2015-03 [Member]  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets $ 5