Note 14 - Commitments, Contingencies, and Guarantees - Obligations (Details) $ in Millions	Dec. 31, 2016 USD ($)
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 267
Contractual obligation payments due	7,861	[1]
Total commitments and contingencies	8,128	[1]
Amended PCC Plan [Member]
Contractual obligation payments due	290	[2]
Purchase Obligations [Member]
Contractual obligation payments due	231	[3]
Capital Addition Purchase Commitments [Member]
Contractual obligation payments due	378	[4]
Total Debt [Member]
Contractual obligation payments due	3,557	[5]
Interest On Long-term Debt [Member]
Contractual obligation payments due	2,222	[6]
Capital Leases [Member]
Contractual obligation payments due	359	[5]
Imputed Interest On Capital Leases [Member]
Contractual obligation payments due	231
Minimum Rental Commitments [Member]
Contractual obligation payments due	545
Uncertain Tax Positions [Member]
Contractual obligation payments due	48	[1]
Less Than 1 Year [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	176
Contractual obligation payments due	1,079	[1]
Total commitments and contingencies	1,255	[1]
Less Than 1 Year [Member] | Amended PCC Plan [Member]
Contractual obligation payments due	70	[2]
Less Than 1 Year [Member] | Purchase Obligations [Member]
Contractual obligation payments due	127	[3]
Less Than 1 Year [Member] | Capital Addition Purchase Commitments [Member]
Contractual obligation payments due	378	[4]
Less Than 1 Year [Member] | Total Debt [Member]
Contractual obligation payments due	250	[5]
Less Than 1 Year [Member] | Interest On Long-term Debt [Member]
Contractual obligation payments due	162	[6]
Less Than 1 Year [Member] | Capital Leases [Member]
Contractual obligation payments due	6	[5]
Less Than 1 Year [Member] | Imputed Interest On Capital Leases [Member]
Contractual obligation payments due	18
Less Than 1 Year [Member] | Minimum Rental Commitments [Member]
Contractual obligation payments due	68
Less Than 1 Year [Member] | Uncertain Tax Positions [Member]
Contractual obligation payments due		[1]
1 to 3 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	3
Contractual obligation payments due	1,245	[1]
Total commitments and contingencies	1,248	[1]
1 to 3 Years [Member] | Amended PCC Plan [Member]
Contractual obligation payments due	85	[2]
1 to 3 Years [Member] | Purchase Obligations [Member]
Contractual obligation payments due	81	[3]
1 to 3 Years [Member] | Capital Addition Purchase Commitments [Member]
Contractual obligation payments due		[4]
1 to 3 Years [Member] | Total Debt [Member]
Contractual obligation payments due	625	[5]
1 to 3 Years [Member] | Interest On Long-term Debt [Member]
Contractual obligation payments due	299	[6]
1 to 3 Years [Member] | Capital Leases [Member]
Contractual obligation payments due	8	[5]
1 to 3 Years [Member] | Imputed Interest On Capital Leases [Member]
Contractual obligation payments due	36
1 to 3 Years [Member] | Minimum Rental Commitments [Member]
Contractual obligation payments due	111
1 to 3 Years [Member] | Uncertain Tax Positions [Member]
Contractual obligation payments due		[1]
3 to 5 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	1
Contractual obligation payments due	848	[1]
Total commitments and contingencies	849	[1]
3 to 5 Years [Member] | Amended PCC Plan [Member]
Contractual obligation payments due	85	[2]
3 to 5 Years [Member] | Purchase Obligations [Member]
Contractual obligation payments due	20	[3]
3 to 5 Years [Member] | Capital Addition Purchase Commitments [Member]
Contractual obligation payments due		[4]
3 to 5 Years [Member] | Total Debt [Member]
Contractual obligation payments due	362	[5]
3 to 5 Years [Member] | Interest On Long-term Debt [Member]
Contractual obligation payments due	259	[6]
3 to 5 Years [Member] | Capital Leases [Member]
Contractual obligation payments due	10	[5]
3 to 5 Years [Member] | Imputed Interest On Capital Leases [Member]
Contractual obligation payments due	36
3 to 5 Years [Member] | Minimum Rental Commitments [Member]
Contractual obligation payments due	76
3 to 5 Years [Member] | Uncertain Tax Positions [Member]
Contractual obligation payments due		[1]
More Than 5 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	87
Contractual obligation payments due	4,641	[1]
Total commitments and contingencies	4,728	[1]
More Than 5 Years [Member] | Amended PCC Plan [Member]
Contractual obligation payments due	50	[2]
More Than 5 Years [Member] | Purchase Obligations [Member]
Contractual obligation payments due	3	[3]
More Than 5 Years [Member] | Capital Addition Purchase Commitments [Member]
Contractual obligation payments due		[4]
More Than 5 Years [Member] | Total Debt [Member]
Contractual obligation payments due	2,320	[5]
More Than 5 Years [Member] | Interest On Long-term Debt [Member]
Contractual obligation payments due	1,502	[6]
More Than 5 Years [Member] | Capital Leases [Member]
Contractual obligation payments due	335	[5]
More Than 5 Years [Member] | Imputed Interest On Capital Leases [Member]
Contractual obligation payments due	141
More Than 5 Years [Member] | Minimum Rental Commitments [Member]
Contractual obligation payments due	290
More Than 5 Years [Member] | Uncertain Tax Positions [Member]
Contractual obligation payments due		[1]
Performance Guarantee [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	178
Performance Guarantee [Member] | Less Than 1 Year [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	102
Performance Guarantee [Member] | 1 to 3 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	2
Performance Guarantee [Member] | 3 to 5 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted
Performance Guarantee [Member] | More Than 5 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	74
Financial Standby Letter of Credit [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	51	[7]
Financial Standby Letter of Credit [Member] | Less Than 1 Year [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	44	[7]
Financial Standby Letter of Credit [Member] | 1 to 3 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted		[7]
Financial Standby Letter of Credit [Member] | 3 to 5 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	1	[7]
Financial Standby Letter of Credit [Member] | More Than 5 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	6	[7]
Credit Facility to Equity Company [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	30
Credit Facility to Equity Company [Member] | Less Than 1 Year [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	30
Credit Facility to Equity Company [Member] | 1 to 3 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted
Credit Facility to Equity Company [Member] | 3 to 5 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted
Credit Facility to Equity Company [Member] | More Than 5 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted
Loan Guarantees [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	8
Loan Guarantees [Member] | Less Than 1 Year [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted
Loan Guarantees [Member] | 1 to 3 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	1
Loan Guarantees [Member] | 3 to 5 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted
Loan Guarantees [Member] | More Than 5 Years [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 7

[1] At December 31, 2016, $0 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] See Note 7 (Investments) to the Consolidated Financial Statements for additional details.

[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.

[7] At December 31, 2016, $39 million of the $51 million was included in other accrued liabilities on our consolidated balance sheets.