Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Investments [Abstract]
Equity method investments	[1]	$ 1,079		$ 1,079		$ 1,048
Time deposits		529		529		255
Available for sale debt instruments		530		530		491
Equity and other investments		43		43		44
Restricted Cash and Cash Equivalents	[2]	86	$ 128	86	$ 128	176
Total		2,267		2,267		$ 2,014
Dividends received		$ 60	$ 79	$ 153	$ 222

[1] Dividends received were $153 and $60 for the nine and three months ended September 30, 2019 and $222 and $79 during the same periods in the prior year.

[2] Reflects amounts restricted in support of our workers’ compensation programs, employee benefit programs, and insurance premiums.