Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
U.S. Pension and Postretirement Plans [Member]
Employer contribution	$ 6
International Pension and Postretirement Plans [Member]
Employer contribution	6
Minimum [Member] | U.S. Pension and Postretirement Plans [Member]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	45
Minimum [Member] | International Pension and Postretirement Plans [Member]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	20
Maximum [Member] | U.S. Pension and Postretirement Plans [Member]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	50
Maximum [Member] | International Pension and Postretirement Plans [Member]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	$ 25