Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Summary Of The Borrowings Outstanding And Capacity Available Under The Facility) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2017 Parent Company [Member]
Summary of the borrowings outstanding and capacity available under the facility
Capacity	$ 3,500.0
Borrowings	190.0
Letters of Credit	8
Capacity Available	3,302
Capacity Decreases		$ 3,490