Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Investments [Abstract]
Time deposits	$ 406		$ 406		$ 1,295
Pledged money market funds	38		38		38
Available-for-sale investments	17		17		7
Equity method investments	1,226		1,226		1,114
Restricted cash	29		29		26
Other investments	35		35		33
Total	1,751		1,751		$ 2,513
Dividends received	$ 62	$ 81	$ 186	$ 215