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Income Tax Expense (Tables)
12 Months Ended
Dec. 31, 2017
Income Tax Disclosure [Abstract]  
Schedule of Federal and State Components of Income Tax Expense (Benefit)
The components of the federal and state income tax expense (benefit) are summarized as follows:
 
Year Ended December 31, 2017
 
Year Ended December 31, 2016
 
Year Ended December 31, 2015
 
(in millions)
Current:
 

 
 

 
 

Federal
$

 
$
(65
)
 
$
(3
)
State
2

 
1

 
1

Total current income tax expense
2

 
(64
)
 
(2
)
Deferred:
 

 
 
 
 
Federal
(302
)
 
(12
)
 
12

State
(6
)
 
4

 
19

Total deferred tax expense (benefit)
(308
)
 
(8
)
 
31

Net income tax expense (benefit)
$
(306
)
 
$
(72
)
 
$
29

Schedule of Effective Income Tax Rate Reconciliation
A reconciliation of income tax expense at the U.S. federal statutory rate to net income tax expense (benefit) is as follows: 
 
Year Ended December 31, 2017
 
Year Ended December 31, 2016
 
Year Ended December 31, 2015
 
(in millions)
Tax at statutory federal rate of 35 percent
$
7

 
$
(6
)
 
$
65

Partnership earnings not subject to tax
(126
)
 
(127
)
 
(55
)
Goodwill impairment
36

 
55

 

Revaluation of investments in affiliates

 

 
9

State and local tax, net of federal benefit
(6
)
 
4

 
1

Statutory rate change
(225
)
 

 
8

Other
8

 
2

 
1

Net income tax expense (benefit)
$
(306
)
 
$
(72
)
 
$
29

Schedule of Principal Components of Deferred Tax Assets (Liabilities)
Deferred taxes result from the temporary differences between financial reporting carrying amounts and the tax basis of existing assets and liabilities. Principal components of deferred tax assets and liabilities are as follows:
 
December 31, 2017
 
December 31, 2016
 
(in millions)
Deferred tax assets:
 

 
 

Environmental, asset retirement obligations, and other reserves
$
20

 
$
28

Inventories
(1
)
 
12

Net operating loss carry forwards
79

 
92

Other
78

 
61

Total deferred tax assets
176

 
193

Deferred tax liabilities:
 
 
 
Fixed assets
324

 
506

Trademarks and other intangibles
169

 
272

Investments in affiliates
72

 
58

Total deferred tax liabilities
565

 
836

Net deferred income tax liabilities
$
389

 
$
643