Pension, Postretirement Health Care and Life Insurance Benefit Plans (Fair Value of Benefit Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
U.S. Plans [Member]
Fair Value of Benefit Plans' Assets [Abstract]
Common and preferred stock	$ 470	$ 463
Cash and invested cash	26	40
Total	1,096	1,047
Non-U.S. Plans [Member]
Fair Value of Benefit Plans' Assets [Abstract]
Common and preferred stock	84	83
Cash and invested cash	126	74
Total	426	379
Other Postretirement Benefits [Member]
Fair Value of Benefit Plans' Assets [Abstract]
Other investments	48	45
Total	48	45
Fixed maturity securities [Member] | U.S. Plans [Member]
Fair Value of Benefit Plans' Assets [Abstract]
Corporate bonds	412	374
U.S. government bonds	155	133
State And Municipal Bonds	33	37
Fixed maturity securities [Member] | Non-U.S. Plans [Member]
Fair Value of Benefit Plans' Assets [Abstract]
Corporate bonds	42	40
U.S. government bonds	6	4
Foreign government bonds	166	174
CDOs	$ 2	$ 4