v3.20.2
Debt - Summary of Debt and Finance Leases (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 3,317 $ 1,399
Net Carrying Value, Long-Term   9,247 10,402
Unpaid Principal Balance   13,151 12,492
Unused Committed Amount   2,382 2,980
Net Carrying Value Finance leases, Current   362 386
Net Carrying Value Finance leases, Long-Term   1,169 1,232
Current portion of debt and finance leases   3,679 1,785
Debt and finance leases, net of current portion   10,416 11,634
5.30% Senior Notes due in 2025 ("2025 Notes") [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Long-Term   1,784 1,782
Solar asset-backed notes [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Long-Term   1,135 1,155
Solar Loan-backed Notes [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Long-Term   161 175
Recourse debt [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   1,376 253
Net Carrying Value, Long-Term   5,730 7,010
Unpaid Principal Balance   7,642 7,898
Unused Committed Amount   575 499
Recourse debt [Member] | 1.25% Convertible Senior Notes due in 2021 ("2021 Notes") [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   1,336  
Net Carrying Value, Long-Term     1,304
Unpaid Principal Balance   $ 1,380 $ 1,380
Contractual Interest Rates   1.25% 1.25%
Contractual Maturity Date 2021-03 2021-03 2021-03
Recourse debt [Member] | 2.375% Convertible Senior Notes due in 2022 [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Long-Term   $ 918 $ 902
Unpaid Principal Balance   $ 977 $ 978
Contractual Interest Rates   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, Long-Term   $ 1,425 $ 1,383
Unpaid Principal Balance   $ 1,839 $ 1,840
Contractual Interest Rates   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   $ 1,784 $ 1,782
Unpaid Principal Balance   $ 1,800 $ 1,800
Contractual Interest Rates   5.30% 5.30%
Contractual Maturity Date   2025-08 2025-08
Recourse debt [Member] | Credit Agreement [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current     $ 141
Net Carrying Value, Long-Term   $ 1,550 1,586
Unpaid Principal Balance   1,550 1,727
Unused Committed Amount   $ 575 $ 499
Contractual Maturity Date   2023-07  
Contractual Maturity Date, Start     2020-06
Contractual Maturity Date, End     2023-07
Recourse debt [Member] | Credit Agreement [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   1.20% 2.70%
Recourse debt [Member] | Credit Agreement [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   3.30% 4.80%
Recourse debt [Member] | Zero-Coupon Convertible Senior Notes due in 2020 [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 35 $ 97
Unpaid Principal Balance   $ 36 $ 103
Contractual Interest Rates   0.00% 0.00%
Contractual Maturity Date   2020-12 2020-12
Recourse debt [Member] | Solar Bonds and other Loans [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 5 $ 15
Net Carrying Value, Long-Term   53 53
Unpaid Principal Balance   $ 60 $ 70
Contractual Maturity Date, Start   2020-07 2020-03
Contractual Maturity Date, End   2031-01 2031-01
Recourse debt [Member] | Solar Bonds and other Loans [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   3.60% 3.60%
Recourse debt [Member] | Solar Bonds and other Loans [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   5.80% 5.80%
Non-recourse debt [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 1,941 $ 1,146
Net Carrying Value, Long-Term   3,517 3,392
Unpaid Principal Balance   5,509 4,594
Unused Committed Amount   1,807 2,481
Non-recourse debt [Member] | Warehouse Agreements [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   92 21
Net Carrying Value, Long-Term   589 146
Unpaid Principal Balance   681 167
Unused Committed Amount   $ 419 $ 933
Contractual Maturity Date   2021-09 2021-09
Non-recourse debt [Member] | Warehouse Agreements [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   1.60% 3.10%
Non-recourse debt [Member] | Warehouse Agreements [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   2.20% 3.60%
Non-recourse debt [Member] | China Loan Agreements [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 945 $ 444
Net Carrying Value, Long-Term   517 297
Unpaid Principal Balance   1,462 741
Unused Committed Amount   $ 1,388 $ 1,542
Contractual Maturity Date, Start   2020-09 2020-09
Contractual Maturity Date, End   2024-12 2024-12
Non-recourse debt [Member] | China Loan Agreements [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   3.50% 3.70%
Non-recourse debt [Member] | China Loan Agreements [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   4.00% 4.00%
Non-recourse debt [Member] | Canada Credit Facility [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 18 $ 24
Net Carrying Value, Long-Term   7 16
Unpaid Principal Balance   $ 25 $ 40
Contractual Maturity Date   2022-11 2022-11
Non-recourse debt [Member] | Canada Credit Facility [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   4.20% 4.20%
Non-recourse debt [Member] | Canada Credit Facility [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   5.80% 5.90%
Non-recourse debt [Member] | Solar Term Loans [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 158 $ 8
Net Carrying Value, Long-Term     152
Unpaid Principal Balance   $ 158 $ 161
Contractual Interest Rates   4.50% 5.40%
Contractual Maturity Date   2021-01 2021-01
Non-recourse debt [Member] | Solar asset-backed notes [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 37 $ 32
Net Carrying Value, Long-Term   1,098 1,123
Unpaid Principal Balance   $ 1,162 $ 1,183
Contractual Maturity Date, Start   2024-09 2024-09
Contractual Maturity Date, End   2048-02 2048-02
Non-recourse debt [Member] | Solar asset-backed notes [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   3.10% 4.00%
Non-recourse debt [Member] | Solar asset-backed notes [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   7.70% 7.70%
Non-recourse debt [Member] | Cash Equity Debt [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 13 $ 10
Net Carrying Value, Long-Term   423 430
Unpaid Principal Balance   $ 448 $ 454
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]      
Contractual Interest Rates   5.30% 5.30%
Non-recourse debt [Member] | Cash Equity Debt [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   5.80% 5.80%
Non-recourse debt [Member] | Automotive Asset-backed Notes [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 650 $ 573
Net Carrying Value, Long-Term   667 997
Unpaid Principal Balance   $ 1,323 $ 1,577
Contractual Maturity Date, Start   2020-12 2020-02
Contractual Maturity Date, End   2023-05 2023-05
Non-recourse debt [Member] | Automotive Asset-backed Notes [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   2.00% 2.00%
Non-recourse debt [Member] | Automotive Asset-backed Notes [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   7.90% 7.90%
Non-recourse debt [Member] | Solar Loan-backed Notes [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 12 $ 11
Net Carrying Value, Long-Term   149 164
Unpaid Principal Balance   $ 167 $ 182
Contractual Maturity Date, Start   2048-09 2048-09
Contractual Maturity Date, End   2049-09 2049-09
Non-recourse debt [Member] | Solar Loan-backed Notes [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   4.80% 4.80%
Non-recourse debt [Member] | Solar Loan-backed Notes [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   7.50% 7.50%
Non-recourse debt [Member] | Solar Renewable Energy Credit and other Loans [Member]      
Debt Instrument [Line Items]      
Net Carrying Value, Current   $ 16 $ 23
Net Carrying Value, Long-Term   67 67
Unpaid Principal Balance   $ 83 89
Unused Committed Amount     $ 6
Contractual Maturity Date, Start   2020-07 2020-03
Contractual Maturity Date, End   2022-06 2022-06
Non-recourse debt [Member] | Solar Renewable Energy Credit and other Loans [Member] | Minimum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   3.50% 4.50%
Non-recourse debt [Member] | Solar Renewable Energy Credit and other Loans [Member] | Maximum [Member]      
Debt Instrument [Line Items]      
Contractual Interest Rates   6.60% 7.40%