Investments (Schedule Of Investments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions [Abstract]
Dividends received	$ 341		$ 239
Investments [Abstract]
Time deposits	3,135		1,134
Pledged money market funds	56	[1]	56	[1]
Available-for-sale investments	9		10
Equity method investments	1,137	[2]	1,003	[2]
Restricted cash	25	[3]	31	[3]
Other investments	35		32
Total	$ 4,397		$ 2,266

[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] Dividends received were $341 and $239 during 2012 and 2011.

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