Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2020		Jun. 30, 2019	Jun. 30, 2020		Jun. 30, 2019	Dec. 31, 2019
Investments [Abstract]
Equity method investments	[1]	$ 998			$ 998			$ 1,031
Time deposits		11,981			11,981			50
Available for sale debt instruments		411			411			405
Equity and other investments		72			72			65
Restricted Cash and Cash Equivalents		42	[2]	$ 85	42	[2]	$ 85	86	[2]
Total		13,504			13,504			$ 1,637
Dividends received		$ 20		$ 30	$ 53		$ 93

[1] ⁽¹⁾  Dividends received were $53 and $20 for the six and three months ended June 30, 2020 and $93 and $30 during the same periods in the prior year.

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