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Leases Lessor (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Lessor, Lease, Description [Line Items] |  |
Operating Lease, Right-of-Use Asset | $ 275,000,000 | $ 248,000,000
Sales-type Lease, Variable Lease Income | 5,000,000 |
Sales-type Lease, Interest Income | 2,000,000 |
Operating Lease, Lease Income | 580,000,000 | 600,000,000
Lease Income | 514,000,000 | 530,000,000
Variable Lease, Income | 66,000,000 | 70,000,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment | 8,472,000,000 | 8,505,000,000
Sales-type and Direct Financing Leases, Lease Receivable, Fiscal Year Maturity [Abstract] |  |
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Next Twelve Months | 2,000,000 |
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Two Years | 2,000,000 |
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Three Years | 3,000,000 |
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years | 3,000,000 |
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Five Years | 3,000,000 |
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Thereafter | 39,000,000 |
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received | 52,000,000 |
Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount | 24,000,000 |
Sales-type and Direct Financing Leases, Lease Receivable | 28,000,000 |
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract] |  |
Lessor, Operating Lease, Payments to be Received, Next Twelve Months | 489,000,000 |
Lessor, Operating Lease, Payments to be Received, Two Years | 475,000,000 |
Lessor, Operating Lease, Payments to be Received, Three Years | 411,000,000 |
Lessor, Operating Lease, Payments to be Received, Four Years | 412,000,000 |
Lessor, Operating Lease, Payments to be Received, Five Years | 412,000,000 |
Lessor, Operating Lease, Payments to be Received, Thereafter | 1,034,000,000 |
Lessor, Operating Lease, Payments to be Received | 3,233,000,000 |
Distributed Energy [Member] |  |
Lessor, Lease, Description [Line Items] |  |
Sales-type and Direct Financing Leases, Profit (Loss) |  | (36,000,000)
Property, Plant and Equipment [Member] |  |
Lessor, Lease, Description [Line Items] |  |
Operating Lease, Right-of-Use Asset | 3,103,000,000 | 2,909,000,000
Assets |  |
Lessor, Lease, Description [Line Items] |  |
Operating Lease, Right-of-Use Asset | 2,092,000,000 | 2,202,000,000
Accumulated Amortization on PP&E [Member] |  |
Lessor, Lease, Description [Line Items] |  |
Operating Lease, Right-of-Use Asset | $ 1,011,000,000 | $ 707,000,000

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- Definition Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919372-209981 + Details
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- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919372-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121561866&loc=SL77919311-209978 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=121640914&loc=SL77927221-108306 + Details
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