Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Investments [Abstract]
Time deposits		$ 148		$ 148		$ 456
Pledged money market funds	[1]	38		38		38
Available-for-sale investments		494		494		244
Equity method investments	[2]	1,230		1,230		1,230
Restricted cash	[3]	27		27		31
Other investments		35		35		35
Total		1,972		1,972		$ 2,034
Dividends received		$ 117	$ 45	$ 166	$ 124

[1] Reflects amounts pledged in lieu of letters of credit as collateral in support of our workers’ compensation programs. These funds can become available within 30 days notice upon issuance of letters of credit.

[2] Dividends received were $166 and $117 for the six and three months ended June 30, 2016 and $124 and $45 during the same periods in the prior year.

[3] Restricted to pay certain claims related to workers' compensation and life insurance premiums for certain employees.