Commitments, Contingencies and Other Items - Lawsuits (Details) (USD $) In Millions, unless otherwise specified		3 Months Ended								3 Months Ended
	Sep. 30, 2014	Dec. 31, 2013 Peruvian Tax Litigation Pending Litigation	Sep. 30, 2014 Peruvian Tax Litigation Pending Litigation	Sep. 30, 2014 Peruvian Tax Litigation, Before Interest Pending Litigation	Sep. 30, 2014 Peruvian Tax Litigation, Income Tax witholding 2001 and 2002 Pending Litigation	Sep. 30, 2014 Peruvian Tax Litigation, VAT for 2001 and 2002 Pending Litigation	Sep. 30, 2014 Peruvian Tax Litigation, Disallowance of VAT in 2005 Pending Litigation	Sep. 30, 2014 Employee Severance and Contractor Termination Disputes Pending Litigation	Sep. 30, 2014 up to Brazilian Tax Claims Pending Litigation	Sep. 30, 2014 Brazilian Tax Reserve Release [Member] Brazilian Tax Claims Pending Litigation
Loss Contingencies
Estimated Litigation Liability	$ 191
Loss Contingency, Asserted Claim			57	26	3	7	16	43
Loss Contingency Accrual, Period Increase (Decrease)		28								6
Loss Contingency, Range of Possible Loss, Portion Not Accrued									$ 59