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v3.19.3.a.u2

Leases (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) facility | Dec. 31, 2018 USD ($)
Lessee, Lease, Description [Line Items] |  |
ROU assets, operating leases | $ 499 | $ 133
Lease liabilities, operating leases | 498 | 141
ROU assets, finance leases | 62 | 68
Lease liabilities, finance leases | $ 56 | $ 63
Weighted average incremental borrowing rate at the lease inception, operating leases | 3.73% | 4.31%
Weighted average incremental borrowing rate at the lease inception, finance leases | 3.15% | 2.72%
Weighted-average remaining lease term, operating leases | 31 years | 19 years
Weighted-average remaining lease term, finance leases | 14 years | 10 years
Expected lease payments over the remaining terms of the leases | $ 981 |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 450 |
Operating Lease, Expense | 91 |
Net investment in sales-type leases | 50 | $ 69
Losses at commencement of sales-type leases |  | $ (20)
Expected lease payments over the remaining terms of the power sales agreements | $ 150 |
Number of facilities | facility | 1 |
Maximum [Member] |  |
Lessee, Lease, Description [Line Items] |  |
Lease extension term, operating lease | 27 years |
Lessee extension term, finance lease | 27 years |

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977 + Details
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