Debt - Summary of Debt and Finance Leases (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020	Jan. 01, 2021	Dec. 31, 2019
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 1,088		$ 1,758
Net Carrying Value, Long-Term		4,254		8,462
Unpaid Principal Balance		5,380		10,569
Unused Committed Amount	[1]	1,108		2,632
Net Carrying Value Finance leases, Current		501		374
Net Carrying Value Finance leases, Long-Term		991		1,094
Current portion of debt and finance leases		1,589		2,132	$ 2,182
Net Carrying Value Total debt and finance leases, Long-Term		5,245		9,556	$ 9,775
2.00% Convertible Senior Notes due in 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage						2.00%
5.30% Senior Notes due in 2025 (2025 Notes) [Member]
Debt Instrument [Line Items]
Net Carrying Value, Long-Term		0	[2]	1,785
Solar Asset and Loan Backed Notes [Member]
Debt Instrument [Line Items]
Net Carrying Value, Long-Term		827	[2]	1,261
Recourse debt [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		30		709
Net Carrying Value, Long-Term		1,346		4,951
Unpaid Principal Balance		1,377		5,957
Unused Committed Amount	[1]	920		278
Recourse debt [Member] | 2.375% Convertible Senior Notes due in 2022 [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		29		115
Net Carrying Value, Long-Term				366
Unpaid Principal Balance		$ 29		$ 503
Debt Instrument Interest Rate Stated Percentage		2.375%		2.375%
Contractual Maturity Date		2022-03		2022-03
Recourse debt [Member] | 2.00% Convertible Senior Notes due in 2024 [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 1		$ 171
Net Carrying Value, Long-Term		89		856
Unpaid Principal Balance		$ 91		$ 1,282
Debt Instrument Interest Rate Stated Percentage		2.00%		2.00%
Contractual Maturity Date		2024-05		2024-05
Recourse debt [Member] | 5.30% Senior Notes due in 2025 (2025 Notes) [Member]
Debt Instrument [Line Items]
Net Carrying Value, Long-Term				$ 1,785
Unpaid Principal Balance				$ 1,800
Debt Instrument Interest Rate Stated Percentage		5.30%		5.30%
Contractual Maturity Date				2025-08
Recourse debt [Member] | 1.25% Convertible Senior Notes due in 2021 (2021 Notes) [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current				$ 419
Unpaid Principal Balance				$ 422
Debt Instrument Interest Rate Stated Percentage		1.25%		1.25%
Contractual Maturity Date				2021-03
Recourse debt [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Net Carrying Value, Long-Term		$ 1,250		$ 1,895
Unpaid Principal Balance		1,250		1,895
Unused Committed Amount	[1]	$ 920		$ 278
Debt Instrument Interest Rate Stated Percentage		3.30%		3.30%
Contractual Maturity Date		2023-07		2023-07
Recourse debt [Member] | Solar Bonds [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 0
Net Carrying Value, Long-Term		7
Unpaid Principal Balance		$ 7
Contractual Maturity Date, Start		2022-01
Contractual Maturity Date, End		2031-01
Recourse debt [Member] | Solar Bonds [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		4.00%
Recourse debt [Member] | Solar Bonds [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		5.80%
Recourse debt [Member] | Solar Bonds and other Loans [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current				$ 4
Net Carrying Value, Long-Term				49
Unpaid Principal Balance				$ 55
Contractual Maturity Date, Start				2021-01
Contractual Maturity Date, End				2031-01
Recourse debt [Member] | Solar Bonds and other Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage				3.60%
Recourse debt [Member] | Solar Bonds and other Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage				5.80%
Non-recourse debt [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 1,058		$ 1,049
Net Carrying Value, Long-Term		2,908		3,511
Unpaid Principal Balance		4,003		4,612
Unused Committed Amount	[1]	188		2,354
Non-recourse debt [Member] | Automotive Asset-backed Notes [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		1,007		777
Net Carrying Value, Long-Term		1,706		921
Unpaid Principal Balance		$ 2,723		$ 1,705
Contractual Maturity Date, Start		2022-09		2021-08
Contractual Maturity Date, End		2025-09		2024-08
Non-recourse debt [Member] | Automotive Asset-backed Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		0.10%		0.60%
Non-recourse debt [Member] | Automotive Asset-backed Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		5.50%		7.90%
Non-recourse debt [Member] | Solar Asset-backed Notes [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 27
Non-recourse debt [Member] | Solar Asset and Loan Backed Notes [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current				$ 52
Net Carrying Value, Long-Term		800		1,209
Unpaid Principal Balance		$ 844		$ 1,293
Contractual Maturity Date, Start		2024-09		2024-09
Contractual Maturity Date, End		2049-09		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		2.90%		3.00%
Non-recourse debt [Member] | Solar Asset and Loan Backed Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		7.70%		7.70%
Non-recourse debt [Member] | China Loan Agreements [Member]
Debt Instrument [Line Items]
Net Carrying Value, Long-Term				$ 616
Unpaid Principal Balance				616
Unused Committed Amount	[1]			$ 1,372
Contractual Maturity Date, Start				2021-06
Contractual Maturity Date, End				2024-12
Non-recourse debt [Member] | China Loan Agreements [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage				4.00%
Non-recourse debt [Member] | Cash Equity Debt [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current		$ 24		$ 18
Net Carrying Value, Long-Term		388		408
Unpaid Principal Balance		$ 422		$ 439
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		5.30%		5.30%
Non-recourse debt [Member] | Cash Equity Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage		5.80%		5.80%
Non-recourse debt [Member] | Warehouse Agreement [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current				$ 37
Net Carrying Value, Long-Term				257
Unpaid Principal Balance				294
Unused Committed Amount	[1]			$ 806
Contractual Maturity Date				2022-09
Non-recourse debt [Member] | Warehouse Agreement [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage				1.70%
Non-recourse debt [Member] | Warehouse Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage				1.80%
Non-recourse debt [Member] | Automotive Lease-backed Credit Facilities [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current				$ 14
Net Carrying Value, Long-Term				19
Unpaid Principal Balance				33
Unused Committed Amount	[1]	$ 167		$ 153
Contractual Maturity Date		2023-09
Contractual Maturity Date, Start				2022-09
Contractual Maturity Date, End				2022-11
Non-recourse debt [Member] | Automotive Lease-backed Credit Facilities [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage				1.90%
Non-recourse debt [Member] | Automotive Lease-backed Credit Facilities [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage				5.90%
Non-recourse debt [Member] | Solar Revolving Credit Facility and Other Loans [Member]
Debt Instrument [Line Items]
Net Carrying Value, Long-Term		$ 14		$ 81
Unpaid Principal Balance		14		81
Unused Committed Amount	[1]	$ 21		$ 23
Debt Instrument Interest Rate Stated Percentage		5.10%
Contractual Maturity Date		2033-02
Contractual Maturity Date, Start				2022-06
Contractual Maturity Date, End				2033-02
Non-recourse debt [Member] | Solar Revolving Credit Facility and Other Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage				2.70%
Non-recourse debt [Member] | Solar Revolving Credit Facility and Other Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Interest Rate Stated Percentage				5.10%
Non-recourse debt [Member] | Solar Term Loans [Member]
Debt Instrument [Line Items]
Net Carrying Value, Current				$ 151
Unpaid Principal Balance				$ 151
Debt Instrument Interest Rate Stated Percentage				3.70%
Contractual Maturity Date				2021-01

[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, solar energy systems and the associated customer contracts or various other assets and as may be described below.

[2] The 2021 Notes, our subsidiary’s 5.50% Convertible Senior Notes due in 2022 and the 2025 Notes were fully settled in 2021