Commitments, Contingencies and Guarantees (Obligations) (Details) $ in Millions	Dec. 31, 2019 USD ($)
Guarantee obligations	$ 206
Contractual obligation payments due	18,998	[1]
Total commitments and contingencies	19,204	[1]
Purchase Obligations [Member]
Contractual obligation payments due	554	[2]
Capital Expenditure Obligations [Member]
Contractual obligation payments due	592	[3]
Total Debt [Member]
Contractual obligation payments due	7,195	[4]
Interest on Long-term Debt [Member]
Contractual obligation payments due	8,948	[5]
Finance Leases and Financing Obligations [Member]
Contractual obligation payments due	600
Imputed Interest on Capital Leases and Financing Obligations [Member]
Contractual obligation payments due	296
Operating Lease Obligations [Member]
Contractual obligation payments due	755
Uncertain Tax Positions [Member]
Contractual obligation payments due	58	[1]
Less Than 1 Year [Member]
Guarantee obligations	61
Contractual obligation payments due	1,216	[1]
Total commitments and contingencies	1,277	[1]
Less Than 1 Year [Member] | Purchase Obligations [Member]
Contractual obligation payments due	190	[2]
Less Than 1 Year [Member] | Capital Expenditure Obligations [Member]
Contractual obligation payments due	592	[3]
Less Than 1 Year [Member] | Interest on Long-term Debt [Member]
Contractual obligation payments due	298	[5]
Less Than 1 Year [Member] | Finance Leases and Financing Obligations [Member]
Contractual obligation payments due	11
Less Than 1 Year [Member] | Imputed Interest on Capital Leases and Financing Obligations [Member]
Contractual obligation payments due	27
Less Than 1 Year [Member] | Operating Lease Obligations [Member]
Contractual obligation payments due	98
1 to 3 Years [Member]
Guarantee obligations	12
Contractual obligation payments due	1,455	[1]
Total commitments and contingencies	1,467	[1]
1 to 3 Years [Member] | Purchase Obligations [Member]
Contractual obligation payments due	199	[2]
1 to 3 Years [Member] | Total Debt [Member]
Contractual obligation payments due	437	[4]
1 to 3 Years [Member] | Interest on Long-term Debt [Member]
Contractual obligation payments due	583	[5]
1 to 3 Years [Member] | Finance Leases and Financing Obligations [Member]
Contractual obligation payments due	30
1 to 3 Years [Member] | Imputed Interest on Capital Leases and Financing Obligations [Member]
Contractual obligation payments due	53
1 to 3 Years [Member] | Operating Lease Obligations [Member]
Contractual obligation payments due	153
3 to 5 Years [Member]
Guarantee obligations	4
Contractual obligation payments due	1,525	[1]
Total commitments and contingencies	1,529	[1]
3 to 5 Years [Member] | Purchase Obligations [Member]
Contractual obligation payments due	75	[2]
3 to 5 Years [Member] | Total Debt [Member]
Contractual obligation payments due	588	[4]
3 to 5 Years [Member] | Interest on Long-term Debt [Member]
Contractual obligation payments due	543	[5]
3 to 5 Years [Member] | Finance Leases and Financing Obligations [Member]
Contractual obligation payments due	160
3 to 5 Years [Member] | Imputed Interest on Capital Leases and Financing Obligations [Member]
Contractual obligation payments due	43
3 to 5 Years [Member] | Operating Lease Obligations [Member]
Contractual obligation payments due	116
More Than 5 Years [Member]
Guarantee obligations	129
Contractual obligation payments due	14,744	[1]
Total commitments and contingencies	14,873	[1]
More Than 5 Years [Member] | Purchase Obligations [Member]
Contractual obligation payments due	90	[2]
More Than 5 Years [Member] | Total Debt [Member]
Contractual obligation payments due	6,170	[4]
More Than 5 Years [Member] | Interest on Long-term Debt [Member]
Contractual obligation payments due	7,524	[5]
More Than 5 Years [Member] | Finance Leases and Financing Obligations [Member]
Contractual obligation payments due	399
More Than 5 Years [Member] | Imputed Interest on Capital Leases and Financing Obligations [Member]
Contractual obligation payments due	173
More Than 5 Years [Member] | Operating Lease Obligations [Member]
Contractual obligation payments due	388
Performance Bonds and Guarantees [Member]
Guarantee obligations	163
Performance Bonds and Guarantees [Member] | Less Than 1 Year [Member]
Guarantee obligations	30
Performance Bonds and Guarantees [Member] | 1 to 3 Years [Member]
Guarantee obligations	4
Performance Bonds and Guarantees [Member] | 3 to 5 Years [Member]
Guarantee obligations	1
Performance Bonds and Guarantees [Member] | More Than 5 Years [Member]
Guarantee obligations	128
Stand-by Letter of Credit [Member]
Guarantee obligations	43	[6]
Stand-by Letter of Credit [Member] | Less Than 1 Year [Member]
Guarantee obligations	31	[6]
Stand-by Letter of Credit [Member] | 1 to 3 Years [Member]
Guarantee obligations	8	[6]
Stand-by Letter of Credit [Member] | 3 to 5 Years [Member]
Guarantee obligations	3	[6]
Stand-by Letter of Credit [Member] | More Than 5 Years [Member]
Guarantee obligations	1	[6]
Loan Guarantees [Member]
Guarantee obligations	82
Other Current Liabilities [Member] | Loan Guarantees [Member]
Guarantee obligations	39
Uncertain Tax Positions [Member]
Contractual obligation payments due	$ 58

[1] At December 31, 2019, $58 million was included on our consolidated balance sheets related to uncertain tax positions.

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

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

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

[5] 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.

[6] At December 31, 2019, we had stand-by letters of credit commitments of $82 million; $39 million was included in other accrued liabilities on our consolidated balance sheets