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Income Taxes - Components of Deferred Income Tax (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred tax assets |  |
Net operating loss (NOL) carryforwards | $ 250 | $ 226
Lease liabilities | 265 | 277
Contract liabilities | 63 | 38
Interest expense carryforwards | 74 | 31
Asset retirement obligation | 116 | 101
Other | 129 | 122
Total deferred tax assets | 897 | 795
Less valuation allowance | (177) | (149)
Net deferred tax assets | 720 | 646
Deferred tax liabilities |  |
Property, plant and equipment | 805 | 751
Licenses/intangibles | 419 | 364
Partnership investments | 173 | 155
Lease assets | 245 | 255
Other | 43 | 40
Total deferred tax liabilities | 1,685 | 1,565
Net deferred income tax liability | 965 | 919
Other assets and deferred charges |  |
Deferred tax liabilities |  |
Net deferred income tax liability | (4) | (2)
Deferred income tax liability, net |  |
Deferred tax liabilities |  |
Net deferred income tax liability | $ 969 | $ 921

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