Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021		Mar. 31, 2020	Dec. 31, 2020
Investments [Abstract]
Equity Method Investments	[1]	$ 925			$ 936
Time deposits		14,187			17,154
Available for sale debt instruments		582			596
Equity and other investments		60			85
Restricted Cash and Cash Equivalents		87	[2]	$ 84	83	[2]
Total		15,841			$ 18,854
Dividends received		$ 5		$ 33

[1] Dividends received were $5 and $33 during the three months ended March 31, 2021 and 2020.

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