Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Investments [Abstract]
Equity method investments	[1]	$ 1,220		$ 1,220		$ 1,242
Time deposits		1,028		1,028		665
Available-for-sale investments		514		514		537
Restricted Cash and Cash Equivalents	[2]	74		74		68
Other investments		31		31		33
Total		2,867		2,867		$ 2,545
Dividends received		$ 52	$ 117	$ 148	$ 166

[1] Dividends received were $148 and $52 for the six and three months ended June 30, 2017 and $166 and $117 during the same periods in the prior year.

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