Retirement Plans and Postretirement Medical Benefits (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Document Period End Date	Dec. 31, 2013	Dec. 31, 2012
Defined Contribution Plan, Cost Recognized	$ 32,000,000	$ 30,000,000
Defined Benefit Plan Historical Health Care Trend Rate	7.00%	7.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.38%	7.25%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year	6.50%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%
Document Fiscal Year Focus	2013	2012	2011
UK Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets	414,000,000	370,000,000
Percent of All Foreign Plan Assets	74.00%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	231,153,000	282,857,000	285,828,000
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	18,000,000
Nominal Rate of Return on Pension Plan	7.00%
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	22,000,000
Nominal Rate of Return on Pension Plan	7.50%
US Nonpension Plan [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation	$ 208,000,000	$ 256,000,000