Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	1 Months Ended		9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Sep. 30, 2016	Sep. 30, 2015
Decrease (increase) in current assets:
Receivables, net			$ (278)	$ 1,093
Inventories			557	(45)
Income taxes receivable			165	88
Prepaid expenses and other			(28)	(11)
Increase (decrease) in current liabilities:
Accounts payable			494	(1,007)
Accrued expenses			46	(5)
Taxes other than income taxes			8	(50)
Income taxes payable			(11)	(17)
Changes in current assets and current liabilities			953	46
Cash Flows Related to Interest and Income Taxes
Interest paid in excess of amount capitalized			312	301
Income taxes paid, net			305	1,532
Supplemental Cash Flow Elements (Textual)
Treasury stock purchased but settled in subsequent quarter			20	30
Stock purchases, shares		506,100
Noncash equity transfer received - APIC			68
Noncash equity transfer given - NCI			68
Deferred tax liability on equity transfer			25
Payment of long-term liability to joint venture partner			143	$ (50)
Owner-Method Joint Venture Investment [Member]
Supplemental Cash Flow Elements (Textual)
Payment of long-term liability to joint venture partner			$ 137
Subsequent Event [Member]
Supplemental Cash Flow Elements (Textual)
Stock purchases, shares	382,935