Retirement Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Contributions to U.S. non qualified and non-U.S. Pension Plan	$ 347
Expected fund in U.S. non pension plan	172
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation U.S. Plan, equities, prior period	58.00%
Target asset allocation U.S. Plan, fixed income, prior period	42.00%
Actual asset allocation percentage of equity	57.00%
Actual asset allocation percentage of fixed income	43.00%
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation percentage for non-U.S. Plan assets	80.00%
U.K. Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation percentage of equity	51.00%
Target asset allocation non-U.S. Plan, equities	53.00%
Target asset allocation non-U.S. Plan, fixed income	47.00%
Actual asset allocation percentage of fixed income	49.00%
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discretionary contributions to pension plan	100
Non-U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discretionary contributions to pension plan	$ 100