Investments (Schedule Of Investments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Investments Schedule [Abstract]
Time deposits	$ 1,295		$ 6,090
Pledged money market funds	38	[1]	46	[1]
Available-for-sale investments	7		8
Equity method investments	1,114	[2]	1,164	[2]
Restricted cash	26	[3]	33	[3]
Other investments	33		33
Total	2,513		7,374
Equity Method Investments and Joint Ventures [Abstract]
Dividends received from equity method investments	293		226
Undistributed earnings from equity method investments	$ 158

[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 $293 and $226 during 2014 and 2013. Retained earnings at December 31, 2014 include undistributed earnings from our equity method investments of $158.

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