Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2020		Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019	Dec. 31, 2019
Investments [Abstract]
Equity Method Investments	[1]	$ 981			$ 981			$ 1,031
Time deposits		15,868			15,868			50
Available for sale debt instruments		596			596			405
Equity and other investments		76			76			65
Restricted Cash and Cash Equivalents		83	[2]	$ 86	83	[2]	$ 86	86	[2]
Total		17,604			17,604			$ 1,637
Dividends received		$ 5		$ 60	$ 58		$ 153

[1] Dividends received were $58 and $5 for the nine and three months ended September 30, 2020 and $153 and $60 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.