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Provision (Benefit) for Income Taxes (Tables)
12 Months Ended
Dec. 31, 2019
Income Tax Disclosure [Abstract]  
Provision (Benefit) for Income Taxes from Continuing Operations
The following table includes the provision (benefit) for income taxes from continuing operations.
 Years Ended December 31,
 201920182017
 (Millions)
Provision (benefit):
Current:
Federal$(19) $(38) $(18) 
State(1)   
(20) (37) (17) 
Deferred:
Federal81  107  (100) 
State  (11) 
90  111  (111) 
Total provision (benefit)$70  $74  $(128) 
Reconciliations from Provision (Benefit) for Income Taxes from Continuing Operations at Federal Statutory Rate
The following table provides reconciliations from the provision (benefit) for income taxes from continuing operations at the federal statutory rate to the realized provision (benefit) for income taxes.
 Years Ended December 31,
 201920182017
 (Millions)
Federal Statutory Rate21 %21 %35 %
Provision (benefit) at statutory rate$69  $66  $(36) 
Increases (decreases) in taxes resulting from:
State income taxes (net of federal benefit) (8) (12) 
Valuation allowance on state net operating losses and other assets
      (net of federal benefit)
14  17  17  
Deferred state income tax rate change (net of federal benefit)(10) (5) (12) 
Reversal of valuation allowance on federal capital loss(10) —  —  
Provisional impact of Tax Cuts and Jobs Act—  —  (92) 
Executive compensation deduction limitation   
Other —   
Provision (benefit) for income taxes$70  $74  $(128) 
Significant Components of Deferred Tax Liabilities and Deferred Tax Assets
The following table includes significant components of deferred tax liabilities and deferred tax assets.
 December 31,
 20192018
 (Millions)
Deferred tax liabilities:
Properties and equipment$938  $797  
Derivatives, net—  33  
Total deferred tax liabilities938  830  
Deferred tax assets:
Accrued liabilities and other156  137  
Alternative minimum tax credits21  40  
NOL and other carryovers682  665  
Derivatives, net —  
Total deferred tax assets864  842  
Less: valuation allowance216  213  
Total net deferred tax assets648  629  
Net deferred tax liabilities$290  $201