Investments (Schedule Of Investments) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Investments Schedule [Abstract]
Time deposits		$ 456	$ 1,295
Pledged money market funds	[1]	38	38
Available-for-sale investments		244	7
Equity method investments	[2]	1,230	1,114
Restricted cash	[3]	31	26
Other investments		35	33
Total		2,034	2,513
Equity Method Investments and Joint Ventures [Abstract]
Dividends received from equity method investments		239	$ 293
Undistributed earnings from equity method investments		$ 251

[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 $239 and $293 during 2015 and 2014. Retained earnings at December 31, 2015 include undistributed earnings from our equity method investments of $251.

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