Financings And Capitalization (Issuance Of Common Stock) (Details) - USD ($) $ / shares in Units, $ in Millions		2 Months Ended	3 Months Ended
	Jul. 07, 2015	May. 31, 2015	Jul. 07, 2015
Subsequent Event [Line Items]
Number of Shares Issued		587,181
Average Price Per Share		$ 34.10
Proceeds		$ 20
Subsequent Event [Member]
Subsequent Event [Line Items]
Number of Shares Issued	301,429		888,610
Average Price Per Share	$ 33.10		$ 33.76
Proceeds	$ 10		$ 30