Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Investments [Abstract]
Time deposits	$ 400		$ 400		$ 1,295
Pledged money market funds	38		38		38
Available-for-sale investments	14		14		7
Equity method investments	1,208		1,208		1,114
Restricted cash	29		29		26
Other investments	35		35		33
Total	1,724		1,724		$ 2,513
Dividends received	$ 45	$ 75	$ 124	$ 134