Recent Accounting Guidance Revenue ASU - Balance Sheet Current Period Impact (Details) - USD ($) $ in Millions	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts and notes receivable - net	$ 7,147		$ 5,239
Inventories	7,901		8,633
Other current assets	1,287		981
Deferred Income Taxes	330		480
Accrued and other current liabilities	4,133		4,384
Deferred Income Tax Liabilities	5,669		5,836
(Accumulated deficit) Retained earnings	(881)		175
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts and notes receivable - net	7,147		5,239
Inventories	7,901		8,633
Other current assets	1,287		981
Deferred Income Taxes	330		480
Accrued and other current liabilities	4,133		4,384
Deferred Income Tax Liabilities	5,669		5,836
(Accumulated deficit) Retained earnings	(881)		$ 175
Effect of Adoption of ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts and notes receivable - net	(205)	$ 65
Inventories	111	(53)
Other current assets	(168)	115
Deferred Income Taxes	(1)	1
Accrued and other current liabilities	(258)	120
Deferred Income Tax Liabilities	(2)	3
(Accumulated deficit) Retained earnings	(3)	$ 8
Balance without Adoption of ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts and notes receivable - net	6,942
Inventories	8,012
Other current assets	1,119
Deferred Income Taxes	329
Accrued and other current liabilities	3,875
Deferred Income Tax Liabilities	5,667
(Accumulated deficit) Retained earnings	$ (884)