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Income Taxes, Components of Deferred Income Tax (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Deferred tax assets |  |
Net operating loss ("NOL") carryforwards | $ 145 | $ 138
Stock-based compensation | 62 | 62
Compensation and benefits - other | 35 | 38
Deferred rent | 23 | 20
Other | 73 | 92
Total deferred tax assets | 338 | 350
Less valuation allowance | (122) | (113)
Net deferred tax assets | 216 | 237
Deferred tax liabilities |  |
Property, plant and equipment | 639 | 672
Licenses/intangibles | 325 | 301
Partnership investments | 173 | 163
Total deferred tax liabilities | 1,137 | 1,136
Net deferred income tax liability | 921 | 899
Deferred income tax liability, net |  |
Deferred tax liabilities |  |
Net deferred income tax liability | 922 | 900
Other assets and deferred charges |  |
Deferred tax liabilities |  |
Net deferred income tax liability | $ (1) | $ (1)

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