Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Investments [Abstract]
Equity method investments	[1]	$ 1,103		$ 1,103		$ 1,048
Time deposits		42		42		255
Available for sale debt instruments		307		307		491
Equity and other investments		44		44		44
Restricted Cash and Cash Equivalents	[2]	85	$ 74	85	$ 74	176
Total		1,581		1,581		$ 2,014
Dividends received		$ 30	$ 55	$ 93	$ 143

[1] Dividends received were $93 and $30 for the six and three months ended June 30, 2019 and $143 and $55 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.