Variable Interest Entities (Balance Sheet Information for Consolidated VIEs) (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents		$ 8,625	$ 5,291
Receivables		13,477	11,034
Inventories		8,827	8,055
Other current assets		1,168	568
Equity method investments		6,466	5,409
Property, plant and equipment, net	[1]	35,657	37,440
Goodwill		8,244	8,256	$ 8,256
Right of use assets		1,214	1,372
Other noncurrent assets		3,081	2,400
Liabilities
Accounts payable		15,312	13,700
Payroll and benefits payable		967	911
Accrued taxes		1,140	1,231
Debt due within one year		1,066	571
Operating lease liabilities		368	438
Other current liabilities		1,167	1,047
Long-term debt		25,634	24,968
Deferred income taxes		5,904	5,638
Long-term operating lease liabilities		841	927
Deferred credits and other liabilities		1,304	1,346
VIE, Primary Beneficiary | MPLX
Assets
Cash and cash equivalents		238	13
Receivables		747	660
Inventories		148	142
Other current assets		56	55
Equity method investments		4,095	3,981
Property, plant and equipment, net		18,848	20,042
Goodwill		7,645	7,657
Right of use assets		283	268
Other noncurrent assets		1,664	891
Liabilities
Accounts payable		664	671
Payroll and benefits payable		4	6
Accrued taxes		67	75
Debt due within one year		988	499
Operating lease liabilities		46	59
Other current liabilities		338	304
Long-term debt		18,808	18,072
Deferred income taxes		13	10
Long-term operating lease liabilities		230	205
Deferred credits and other liabilities		$ 366	$ 559

[1] Includes finance leases. See Note 28.