Financial Instruments (Schedule of the Fair Value of Derivative Instruments) (Details) - Fair Value, Measurements, Recurring [Member] - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	[1]	$ 182	$ 74
Liability derivatives	[1]	121	84
Derivative assets and liabilities subject to master netting arrangement		114	35
Other accrued liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash collateral	[2]	52	7
Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability derivatives		121	84
Not Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Accounts and notes receivable, net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivatives	[2]	182	74
Not Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Other accrued liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability derivatives		121	80
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other accrued liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability derivatives		$ 0	$ 4

[1] The company's derivative assets and liabilities subject to enforceable master netting arrangements totaled $114 and $35 at December 31, 2016 and 2015.

[2] Cash collateral held as of December 31, 2016 and 2015 is related to foreign currency derivatives not related to hedging instruments.