Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Pension contribution made to United Kingdom trust	$ 25
U.S. Pension and Postretirement Plans [Member]
Employer contribution	12
Estimated future employer contributions in next fiscal year minimum remaining	43
Estimated future employer contributions in next fiscal year maximum remaining	48
International Pension and Postretirement Plans [Member]
Employer contribution	47
Estimated future employer contributions in next fiscal year minimum remaining	18
Estimated future employer contributions in next fiscal year maximum remaining	$ 23