Leases - Components of Net Investment in Sales - Type and Direct Financing Leases (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Net Investment in Leases [Abstract]
Lease receivables	$ 12,204	$ 12,207
Unguaranteed residual values accruing to the lessor's benefit	1,898	1,877
Total net investment in sales-type and direct financing leases	$ 14,102	$ 14,084

Amount of net investment in sales-type and direct financing lease.

Reference 1: 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=77888421&loc=SL77919306-209978

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- References

No definition available.

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- Definition

Present value of lease payments not yet received by lessor and amount expected to be derived from underlying asset, following end of lease term guaranteed by lessee or other third party unrelated to lessor, from sales-type and direct financing leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=77888428&loc=SL77919391-209981

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=77888428&loc=SL77919379-209981

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- Definition

Sales type and direct financing leases unguaranteed residual asset.

+ References

No definition available.

+ Details

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