Investments (Schedule Of Investments) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Investments [Abstract]
Time deposits	$ 3,915		$ 1,134
Pledged money market funds	56	[1]	56	[1]
Available-for-sale investments	8		10
Equity method investments	963		1,003
Restricted cash	29	[2]	31	[2]
Other investments	35		32
Total	$ 5,006		$ 2,266

[1] (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 replacement letters of credit.

[2] (2) Restricted to pay group term life insurance premiums for certain employees and certain claims related to workers' compensation.