Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Investments Schedule [Abstract]
Equity method investments	[1]	$ 1,031		$ 1,048
Time deposits		50		255
Available for sale debt instruments		405		491
Equity and other investments		65		44
Restricted Cash and Cash Equivalents		86	[2]	176	[2]	$ 74
Total		1,637		2,014
Equity Method Investments and Joint Ventures [Abstract]
Dividends received from equity method investments		164		$ 325
Undistributed earnings from equity method investments		$ 156

[1] ⁽¹⁾  Dividends received were $164 and $325 during 2019 and 2018. Retained earnings at December 31, 2019 include undistributed earnings from our equity method investments of $156.

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