Contingencies and Litigation (Details) $ in Millions	May 09, 2014	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items]
Letters of Credit and Surety Bonds Outstanding, Amount		$ 91
Loss Contingency, Damages Sought, Multiplier Of Overpayment Amounts	2
Brazil Tax And Labor Contingencies [Member]
Loss Contingencies [Line Items]
Unreserved tax and labor contingencies		749	$ 577
Escrow cash deposits		85
Net book value of assets with liens		4
Letters of Credit Outstanding, Amount		$ 141