Leases - Components of Net Investment in Sales - Type and Direct Financing Leases (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Net Investment in Leases [Abstract]
Lease receivables	$ 10,738	$ 11,890
Unguaranteed residual values accruing to the lessor's benefit	1,610	1,787
Total net investment in sales-type and direct financing leases	$ 12,348	$ 13,677

Amount, before allowance for credit loss, of net investment in sales-type and direct financing leases.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123420820&loc=SL77919306-209978

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant