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Leases - Lease-Related Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets |  |
Operating lease assets | $ 729 | $ 804
Finance lease assets | 3 | 131
Total lease assets | $ 732 | $ 935
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization | Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Current: |  |
Operating lease liabilities | $ 106 | $ 113
Finance lease liabilities | $ 1 | $ 37
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | Long-term Debt and Lease Obligation, Current | Long-term Debt and Lease Obligation, Current
Long-term: |  |
Operating lease liabilities | $ 690 | $ 752
Finance lease liabilities | 2 | 26
Total lease liabilities | $ 799 | $ 928
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Long-term debt and finance lease obligations | Long-term debt and finance lease obligations
Weighted average remaining lease term (in years) |  |
Operating leases | 9 years | 9 years
Finance leases | 2 years | 2 years
Weighted average discount rate |  |
Operating leases | 6.00% | 5.99%
Finance leases | 6.09% | 4.60%

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as current. + 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 (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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