Retirement Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	3 Months Ended	9 Months Ended			9 Months Ended							0 Months Ended
	Sep. 30, 2014	Mar. 31, 2014 Non-U.S. Pension Benefits [Member]	Sep. 30, 2014 Non-U.S. Pension Benefits [Member]	Sep. 30, 2013 Non-U.S. Pension Benefits [Member]	Jan. 31, 2014 Non-U.S. Pension Benefits [Member]	Sep. 30, 2014 Pension Benefits [Member]	Sep. 30, 2013 Pension Benefits [Member]	Sep. 30, 2014 Equity Funds [Member] United States Pension and Postretirement Benefit Plan of US Entity, Defined Benefit [Member]	Sep. 30, 2014 Fixed Income Funds [Member] United States Pension and Postretirement Benefit Plan of US Entity, Defined Benefit [Member]	Sep. 30, 2014 United Kingdom [Member] Equity Funds [Member] Non-U.S. Plans [Member]	Sep. 30, 2014 United Kingdom [Member] Fixed Income Funds [Member] Non-U.S. Plans [Member]	Sep. 30, 2014 United Kingdom [Member] Geographic Concentration Risk [Member] Non-U.S. Plans [Member] Non-U.S. Pension Benefits [Member]	Oct. 17, 2014 Subsequent Event [Member] Equity Funds [Member] United States Pension and Postretirement Benefit Plan of US Entity, Defined Benefit [Member]	Oct. 17, 2014 Subsequent Event [Member] Fixed Income Funds [Member] United States Pension and Postretirement Benefit Plan of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation U.S. Plan, equities, prior period								58.00%	42.00%	50.00%	50.00%		62.00%	38.00%
Actual asset allocation percentage of equity								57.00%	43.00%	45.00%	55.00%
Concentration risk percentage												82.00%
Effect of plan amendment on accumulated benefit obligation					$ 147
Effect of plan amendment on funded status					137
Gain (loss) due to curtailments		65	65	0		65	0
Contributions to U.S. non qualified and non-U.S. Pension Plan	140
Expected contribution during remainder of 2013						$ 43