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Leases - Components of Equipment Leasing Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Sales-type and direct financing leases
Interest income on lease receivable	$ 23	$ 28
Interest income related to accretion of unguaranteed residual asset	2	3
Total sales-type and direct financing lease income	25	31
Operating leases
Operating lease income related to lease payments	32	34
Other operating leasing gains	6	(4)
Total operating lease income and other leasing gains	38	30
Total lease income	$ 63	$ 61

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Operating Lease, Other Operating Leasing Gains

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Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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Amount of operating lease income from lease payments paid and payable to lessor. Excludes variable lease payments not included in measurement of lease receivable.

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Amount of interest income from lease receivable of sales-type lease.

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Amount of interest income from unguaranteed residual asset of sales-type lease.

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