Amount of increase (decrease) of allowance reserve for credit loss.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Percentage of financing receivable balance that is past due.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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Receivables, Allowance for Credit Losses and Credit Quality of Receivables - Allowance for Notes Receivable Activity (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jan. 01, 2020	Dec. 31, 2019
Allowance for notes receivable
Financing Receivable, Allowance for Credit Loss	$ (82)	$ (42)	$ (40)	$ (42)	$ (40)	$ (42)	$ (40)
Provision for Loan, Lease, and Other Losses		(28)	(1)	(12)	(1)	(1)	(1)
Financing Receivable, Allowance for Credit Loss, Recovery		0	3	0	3	10	0
Financing Receivable, Allowance for Credit Loss	(73)	(70)	$ (38)	(82)	$ (36)	(73)	$ (37)
Cumulative Effect of New Accounting Principle in Period of Adoption								$ (6)
Allowance for Loan and Lease Losses, Period Increase (Decrease)	$ 1					$ 41
Accounting Standards Update 2016-13 [Member]
Allowance for notes receivable
Cumulative Effect of New Accounting Principle in Period of Adoption								$ 6
Balances Over 90 days Past Due
Allowance for notes receivable
Financing Receivable, Percent Past Due	16.00%					16.00%			11.00%
International [Member]
Allowance for notes receivable
Financing Receivable, Allowance for Credit Loss	$ (44)	(28)		(28)		$ (28)
Provision for Loan, Lease, and Other Losses		(13)		(3)		0
Financing Receivable, Allowance for Credit Loss, Recovery		0		0		8
Financing Receivable, Allowance for Credit Loss	(36)	(41)		(44)		(36)
UNITED STATES
Allowance for notes receivable
Financing Receivable, Allowance for Credit Loss	(38)	(14)		(14)		(14)
Provision for Loan, Lease, and Other Losses		(15)		(9)		(1)
Financing Receivable, Allowance for Credit Loss, Recovery		0		0		2
Financing Receivable, Allowance for Credit Loss	(37)	(29)		(38)		(37)
Notes receivable
Allowance for notes receivable
Financing Receivable, Allowance for Credit Loss		(36)		(36)		(36)
Financing Receivable, Allowance for Credit Loss	(73)					(73)
Notes receivable \| International [Member]
Allowance for notes receivable
Financing Receivable, Allowance for Credit Loss		$ (23)		$ (23)		(23)
Financing Receivable, Allowance for Credit Loss	$ (36)					$ (36)