Investments (Schedule Of Investments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013	Dec. 31, 2013
Investments [Abstract]
Time deposits	$ 3,721			$ 3,721			$ 6,090
Pledged money market funds	46	[1]		46	[1]		46	[1]
Available-for-sale investments	12			12			8
Equity method investments	1,151	[2]		1,151	[2]		1,164	[2]
Restricted cash	30	[3]		30	[3]		33	[3]
Other investments	33			33			33
Total	4,993			4,993			7,374
Dividends received	$ 75		$ 53	$ 134		$ 103

[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 $134 and $75 for the six and three months ended June 30, 2014 and $103 and $53 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.