Retirement Plans (Retirement Plans, Net Periodic Benefit Cost, Assumptions, and Expected Cash Flows) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 17
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Net Periodic Benefit Cost	32	26	27
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Number of years annual benefit payments	10 years
Expected future annual benefit payments for the next 10 years	$ 40
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	4.80%	4.80%
Rate of compensation increase	5.50%	5.50%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.80%	5.20%	7.10%
Expected long-term return on plan assets	6.40%	6.50%	5.70%
Rate of compensation increase	5.50%	5.40%	6.20%