Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2021		Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020	Dec. 31, 2020
Investments [Abstract]
Equity Method Investments	[1]	$ 846			$ 846			$ 936
Time deposits		12,530			12,530			17,154
Available for sale debt instruments		500			500			596
Equity and other investments		42			42			85
Restricted Cash and Cash Equivalents		36	[2]	$ 42	36	[2]	$ 42	83	[2]
Total		13,954			13,954			$ 18,854
Dividends received		$ 38		$ 20	$ 43		$ 53

[1] Dividends received were $43 and $38 for the six and three months ended June 30, 2021 and $53 and $20 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.