Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components of earnings before income taxes
United States		$ 337	$ 138	$ 180
Foreign		298	148	110
Total earnings (loss) excluding non-controlling interest		635	286	290
Net income attributable to noncontrolling interests		1	0	0
Earnings before income taxes		636	286	290
Current:
Federal		35	(50)	12
Foreign		33	35	39
State and local		10	2	(1)
Deferred:
Federal		3	26	(39)
Foreign		(7)	(3)	(1)
State and local		(9)	(7)	(7)
Income tax expense		65	3	3
Unrealized changes in other comprehensive income (loss)		8	$ (3)	(4)
Total income taxes		$ 73		$ (1)
Income taxes
Federal income tax rate (as a percent)		21.00%	21.00%	21.00%
Reconciliation of computed expected tax expense excluding non-controlling interest to income tax expense (benefit) attributable to continuing operations
Computed "expected" tax expense (benefit) excluding non-controlling interest		$ 133	$ 60	$ 61
Adjustments to tax expense (benefit) attributable to:
Foreign tax differences		(30)	(4)	14
Tax-exempt income		(15)	(17)	(29)
Federal tax credits		(39)	(34)	(47)
Unrecognized tax benefits		14
Other		2	(2)	4
Income tax expense		65	3	3
Income taxes receivable		46	18
Income taxes payable		13	14
Deferred income tax liabilities:
Depreciation		121	100
Domestic partnerships		62	59
Unrealized gain on investments		13	52
Inventory		7	10
Other		4	3
Gross deferred income tax liabilities		207	224
Deferred income tax assets:
Reserves/accruals		66	74
Net operating and capital loss carry-forwards		67	52
Tax credit carry-forwards		32	49
Other		5	5
Gross deferred income tax assets		170	180
Less: Valuation allowance		60	55
Net deferred income tax liability		97	$ 99
Time period to recognize tax LIFO reserve as taxable income			4 years
Accrued interest and penalties on uncertain tax positions		10	$ 8
Unrecognized tax benefits, if recognized, would affect the effective tax rate		41	30
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Balance at the beginning of the year		30	31
Additions for uncertain tax positions of prior years		7	2
Decreases for uncertain tax positions of prior years		(1)	(7)
Additions for uncertain tax positions of current year		6	5
Lapse of statute of limitations		(1)	(1)
Balance at the end of the year	$ 31	41	30	31
Gross non-taxable revenue related to federal blender's credit	136
Other commitments
Contribution to long-term investment		98	47	38
Investment tax credits		$ 24	22	34
Minimum
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Number of tax years typically subject to examination for major non-US jurisdictions		3 years
Maximum
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Number of tax years typically subject to examination for major non-US jurisdictions		6 years
Allowance for Deferred Tax Assets:
Movement in valuation and qualifying accounts
Balance at beginning of year		$ 55	68	59
Charge (credit) to expense		5	(13)	9
Balance at end of year	68	60	55	68
Refined coal processing plant
Other commitments
Contribution to long-term investment		11	$ 17	15
Biogas fueled power project
Other commitments
Contribution to long-term investment		4		20
Tax Period Third Quarter 2020
Deferred income tax assets:
LIFO reserve	$ 51			$ 51
Foreign
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Net operating loss carry-forwards (NOLs)		185
State
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Net operating loss carry-forwards (NOLs)		195
Tax credit carry-forwards		$ 28