Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Summary Of The Borrowings Outstanding And Capacity Available Under The Facility) (Details) - Credit Facility of Three Point Five Billion $ in Millions	Dec. 31, 2021 USD ($)
Line of credit facility, maximum borrowing capacity	$ 3,500
Amount Drawn/ Outstanding	165
Letters of Credit	6
Capacity Available	3,329
Letters of Credit Outstanding, Amount	6
Line of Credit Facility, Remaining Borrowing Capacity	$ 3,329