Note 14 - Commitments, Contingencies, and Guarantees (Details) - Obligations $ in Millions	Dec. 31, 2015 USD ($)
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	$ 184
Contractual obligation payments due	8,251	[1]
Total commitments and contingencies (5)	8,435	[1]
Performance Guarantee [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	92
Financial Standby Letter of Credit [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	47	[2]
Credit Facility to Equity Company [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	31
Loan Guarantees [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	14
Purchase Obligations [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	220	[3]
Capital Addition Purchase Commitments [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	298	[4]
Total Debt [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	4,122	[5]
Interest On Long-term Debt [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	2,385	[6]
Capital Leases [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	355	[5]
Imputed Interest On Capital Leases [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	240
Minimum Rental Commitments [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	573
Uncertain Tax Positions [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	58	[1]
Less Than 1 Year [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	96
Contractual obligation payments due	1,209	[1]
Total commitments and contingencies (5)	1,305	[1]
Less Than 1 Year [Member] | Performance Guarantee [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	25
Less Than 1 Year [Member] | Financial Standby Letter of Credit [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	44	[2]
Less Than 1 Year [Member] | Credit Facility to Equity Company [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	27
Less Than 1 Year [Member] | Purchase Obligations [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	106	[3]
Less Than 1 Year [Member] | Capital Addition Purchase Commitments [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	298	[4]
Less Than 1 Year [Member] | Total Debt [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	565	[5]
Less Than 1 Year [Member] | Interest On Long-term Debt [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	165	[6]
Less Than 1 Year [Member] | Capital Leases [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	7	[5]
Less Than 1 Year [Member] | Imputed Interest On Capital Leases [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	19
Less Than 1 Year [Member] | Minimum Rental Commitments [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	49
1 to 3 Years [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	6
Contractual obligation payments due	1,175	[1]
Total commitments and contingencies (5)	1,181	[1]
1 to 3 Years [Member] | Performance Guarantee [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	6
1 to 3 Years [Member] | Purchase Obligations [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	77	[3]
1 to 3 Years [Member] | Total Debt [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	625	[5]
1 to 3 Years [Member] | Interest On Long-term Debt [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	316	[6]
1 to 3 Years [Member] | Capital Leases [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	10	[5]
1 to 3 Years [Member] | Imputed Interest On Capital Leases [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	37
1 to 3 Years [Member] | Minimum Rental Commitments [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	110
3 to 5 Years [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	1
Contractual obligation payments due	983	[1]
Total commitments and contingencies (5)	984	[1]
3 to 5 Years [Member] | Performance Guarantee [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	1
3 to 5 Years [Member] | Purchase Obligations [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	33	[3]
3 to 5 Years [Member] | Total Debt [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	550	[5]
3 to 5 Years [Member] | Interest On Long-term Debt [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	280	[6]
3 to 5 Years [Member] | Capital Leases [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	7	[5]
3 to 5 Years [Member] | Imputed Interest On Capital Leases [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	36
3 to 5 Years [Member] | Minimum Rental Commitments [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	77
More Than 5 Years [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	81
Contractual obligation payments due	4,826	[1]
Total commitments and contingencies (5)	4,907	[1]
More Than 5 Years [Member] | Performance Guarantee [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	60
More Than 5 Years [Member] | Financial Standby Letter of Credit [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	3	[2]
More Than 5 Years [Member] | Credit Facility to Equity Company [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	4
More Than 5 Years [Member] | Loan Guarantees [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Commitment expirations	14
More Than 5 Years [Member] | Purchase Obligations [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	4	[3]
More Than 5 Years [Member] | Total Debt [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	2,382	[5]
More Than 5 Years [Member] | Interest On Long-term Debt [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	1,624	[6]
More Than 5 Years [Member] | Capital Leases [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	331	[5]
More Than 5 Years [Member] | Imputed Interest On Capital Leases [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	148
More Than 5 Years [Member] | Minimum Rental Commitments [Member]
Recorded Unconditional Purchase Obligation [Line Items]
Contractual obligation payments due	$ 337

[1] At December 31, 2015, $58 million was included on our balance sheet related to uncertain tax positions. Of this amount, we are unable to estimate when any of that amount will become payable.

[2] At December 31, 2015, $38 million of the $47 million was included in other accrued liabilities on our consolidated balance sheets.

[3] Purchase obligations are enforceable and legally binding obligations which primarily consist of raw material and energy-related take-or-pay contracts.

[4] Capital expenditure obligations primarily reflect amounts associated with our capital expansion activities.

[5] Total debt above is stated at maturity value, and excludes interest rate swap gains/losses and bond discounts.

[6] The estimate of interest payments assumes interest is paid through the date of maturity or expiration of the related debt, based upon stated rates in the respective debt instruments.