Recent Accounting Guidance Revenue ASU - Balance Sheet Impact of Adoption (Details) - USD ($) $ in Millions	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts and notes receivable - net	$ 7,734		$ 5,239
Inventories	6,303		8,633
Other current assets	1,311		981
Deferred Income Taxes	361		480
Accounts Payable	4,002		4,831
Accrued and other current liabilities	3,024		4,384
Deferred Income Tax Liabilities	5,424		5,836
Retained earnings	(1,201)		175
Return Assets		$ 61
Refund Liabilities		119
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts and notes receivable - net	7,734		5,239
Inventories	6,303		8,633
Other current assets	1,311		981
Deferred Income Taxes	361		480
Accounts Payable			4,831
Accrued and other current liabilities	3,024		4,384
Deferred Income Tax Liabilities	5,424		5,836
Retained earnings	(1,201)		$ 175
Effect of Adoption of ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts and notes receivable - net	(150)	79
Inventories	57	(53)
Other current assets	(119)	101
Deferred Income Taxes	(1)	1
Accounts Payable		(3)
Accrued and other current liabilities	(168)	120
Deferred Income Tax Liabilities	(11)	3
Retained earnings	$ (34)	8
Updated
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts and notes receivable - net		5,318
Inventories		8,580
Other current assets		1,082
Deferred Income Taxes		481
Accounts Payable		4,828
Accrued and other current liabilities		4,504
Deferred Income Tax Liabilities		5,839
Retained earnings		$ 183