Investments (Schedule Of Investments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013	Dec. 31, 2013
Investments [Abstract]
Time deposits	$ 5,205			$ 6,090
Pledged money market funds	46	[1]		46	[1]
Available-for-sale investments	11			8
Equity method investments	1,165	[2]		1,164	[2]
Restricted cash	30	[3]		33	[3]
Other investments	33			33
Total	6,490			7,374
Dividends received	$ 59		$ 50

[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 $59 and $50 during the three months ended March 31, 2014 and 2013.

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