Other Contingencies and Commitments (Details)		9 Months Ended
	Nov. 07, 2011 bbl	Sep. 30, 2015	Dec. 31, 2009 USD ($)
Loss Contingencies [Line Items]
Indemnifications acquirer environmental liabilities max obligation			$ 200,000,000
Indemnification expiration		2022-04
BRAZIL [Member]
Loss Contingencies [Line Items]
Emitted of barrels of oil | bbl	2,400