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Material Contingencies - Other (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Guarantor Obligations [Line Items] |  |
Guarantee obligations maximum exposure | $ 2,157 | $ 2,042
Financial Guarantee for Indemnity Agreements for Surety Bonds in Connection with Operation of Solar Energy Facilities and Energy Service Projects |  |
Guarantor Obligations [Line Items] |  |
Guarantee obligations maximum exposure | $ 70 |

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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248 + Details
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