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, 2012
Summary of the borrowings outstanding and capacity available under the facility
Capacity	$ 3,500
Borrowings	1,470
Letters of Credit	8
Capacity Available	$ 2,022

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, 2012

Summary of the borrowings outstanding and capacity available under the facility

$ 3,500

Borrowings

1,470

Letters of Credit

Capacity Available

$ 2,022