Debt - Summary of Debt and Finance Leases (Detail) - USD ($) $ in Millions		6 Months Ended	12 Months Ended
		Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 1,057	$ 1,088
Net Carrying Value, Long-Term		2,095	4,254
Unpaid Principal Balance		3,180	5,380
Unused Committed Amount	[1]	2,438	1,108
Net Carrying Value Finance leases, Current		475	501
Net Carrying Value Finance leases, Long-Term		803	991
Current portion of debt and finance leases		1,532	1,589
Net Carrying Value Total debt and finance leases, Long-Term		$ 2,898	5,245
2.375% Convertible Senior Notes due in 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		2.375%
Solar Asset and Loan-Backed Notes [Member]
Debt Instrument [Line Items]
Net Carrying Value, Long-Term		$ 450	827
Recourse debt [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		1	30
Net Carrying Value, Long-Term		52	1,346
Unpaid Principal Balance		53	1,377
Unused Committed Amount	[1]	2,265	920
Recourse debt [Member] | 2.375% Convertible Senior Notes due in 2022 [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current			29
Unpaid Principal Balance			$ 29
Debt Instrument Interest Rate Stated Percentage			2.375%
Contractual Maturity Date			2022-03
Recourse debt [Member] | 2.00% Convertible Senior Notes due in 2024 [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		1	$ 1
Net Carrying Value, Long-Term		45	89
Unpaid Principal Balance		46	$ 91
Unused Committed Amount	[1]	$ 0
Debt Instrument Interest Rate Stated Percentage		2.00%	2.00%
Contractual Maturity Date		2024-05	2024-05
Recourse debt [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 0
Net Carrying Value, Long-Term		0	$ 1,250
Unpaid Principal Balance		0	1,250
Unused Committed Amount	[1]	$ 2,265	$ 920
Debt Instrument Interest Rate Stated Percentage			3.25%
Contractual Maturity Date		2023-07	2023-07
Recourse debt [Member] | Solar Bonds [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 0	$ 0
Net Carrying Value, Long-Term		7	7
Unpaid Principal Balance		7	$ 7
Unused Committed Amount	[1]	$ 0
Contractual Maturity Date, Start		2025-03	2022-01
Contractual Maturity Date, End		2031-01	2031-01
Recourse debt [Member] | Solar Bonds [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		4.70%	4.00%
Recourse debt [Member] | Solar Bonds [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		5.75%	5.75%
Non-recourse debt [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 1,056	$ 1,058
Net Carrying Value, Long-Term		2,043	2,908
Unpaid Principal Balance		3,127	4,003
Unused Committed Amount	[1]	173	188
Non-recourse debt [Member] | Automotive Asset-backed Notes [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		1,021	1,007
Net Carrying Value, Long-Term		1,216	1,706
Unpaid Principal Balance		2,244	$ 2,723
Unused Committed Amount	[1]	$ 0
Contractual Maturity Date, Start		2022-10	2022-09
Contractual Maturity Date, End		2025-09	2025-09
Non-recourse debt [Member] | Automotive Asset-backed Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		0.36%	0.12%
Non-recourse debt [Member] | Automotive Asset-backed Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		5.48%	5.48%
Non-recourse debt [Member] | Solar Asset and Loan-Backed Notes [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 12	$ 27
Net Carrying Value, Long-Term		438	800
Unpaid Principal Balance		459	$ 844
Unused Committed Amount	[1]	$ 0
Contractual Maturity Date, Start		2026-12	2024-09
Contractual Maturity Date, End		2048-02	2049-09
Non-recourse debt [Member] | Solar Asset and Loan-Backed Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		4.12%	2.87%
Non-recourse debt [Member] | Solar Asset and Loan-Backed Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		7.74%	7.74%
Non-recourse debt [Member] | Cash Equity Debt [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 23	$ 24
Net Carrying Value, Long-Term		376	388
Unpaid Principal Balance		411	$ 422
Unused Committed Amount	[1]	$ 0
Contractual Maturity Date, Start		2033-07	2033-07
Contractual Maturity Date, End		2035-01	2035-01
Non-recourse debt [Member] | Cash Equity Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		5.25%	5.25%
Non-recourse debt [Member] | Cash Equity Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		5.81%	5.81%
Non-recourse debt [Member] | Automotive Lease-backed Credit Facilities [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 0
Net Carrying Value, Long-Term		0
Unpaid Principal Balance		0
Unused Committed Amount	[1]	$ 152	$ 167
Contractual Maturity Date		2023-09	2023-09
Non-recourse debt [Member] | Other Loans [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 0
Net Carrying Value, Long-Term		13	$ 14
Unpaid Principal Balance		13	14
Unused Committed Amount	[1]	$ 21	$ 21
Debt Instrument Interest Rate Stated Percentage		5.10%	5.10%
Contractual Maturity Date		2033-02	2033-02

[1] There are no restrictions on draw-down or use for general corporate purposes with respect to any available committed funds under our credit facilities, except certain specified conditions prior to draw-down, including pledging to our lenders sufficient amounts of qualified receivables, inventories, leased vehicles and our interests in those leases or various other assets and as may be described below and in the notes to the consolidated financial statements included in our report on Form 10-K for the year ended December 31, 2021.