Employee Benefit Plans (Projected Benefit Obligation in Excess of Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Pension Benefits U.S. Plans [Member]
Defined Benefit Plan Pension Plans With Projected Benefit Obligations In Excess Of Plan Assets [Abstract]
Projected benefit obligations	$ 1,170	$ 9,480
Fair value of plan assets	133	7,879
Pension Benefits Non-U.S. Plans [Member]
Defined Benefit Plan Pension Plans With Projected Benefit Obligations In Excess Of Plan Assets [Abstract]
Projected benefit obligations	701	763
Fair value of plan assets	199	188
Other Postretirement Benefits U.S. Plans [Member]
Defined Benefit Plan Pension Plans With Projected Benefit Obligations In Excess Of Plan Assets [Abstract]
Projected benefit obligations	1,834	2,375
Fair value of plan assets	1,352	1,320
Other Postretirement Benefits Non-U.S. Plans [Member]
Defined Benefit Plan Pension Plans With Projected Benefit Obligations In Excess Of Plan Assets [Abstract]
Projected benefit obligations	41	43
Fair value of plan assets	$ 14	$ 15