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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2015
Income Taxes [Line Items]  
Provision for (Benefit From) Income Taxes
The provision for (benefit from) income taxes consists of the following:
 
 
Year Ended December 31,
 
 
2015
 
2014
 
2013
Current
 
 
 
 
 
 
Federal
$
(32
)
 
$
(1
)
 
$
(4
)
 
State
3

 
4

 
12

 
Foreign
40

 
79

 
36

 
Current income tax provision
11

 
82

 
44

 
 
 
 
 
 
 
Deferred
 
 
 
 
 
 
Federal
45

 
89

 
28

 
State
(1
)
 
2

 
8

 
Foreign
14

 
(26
)
 
1

 
Deferred income tax provision
58

 
65

 
37

Provision for income taxes
$
69

 
$
147

 
$
81

Pretax Income (Loss) for Domestic and Foreign Operations
Pretax income for domestic and foreign operations consists of the following:
 
Year Ended December 31,
 
2015
 
2014
 
2013
United States (a)
$
258

 
$
248

 
$
4

Foreign
124

 
144

 
93

Pretax income
$
382

 
$
392

 
$
97

__________
(a)  
For the years ended December 31, 2015, 2014 and 2013, includes corporate debt extinguishment costs of $23 million, $56 million and $147 million, respectively.
Deferred Income Tax Assets and Liabilities
Deferred income tax assets and liabilities are comprised of the following:
 
 
As of December 31,
 
 
2015
 
2014
Deferred income tax assets:
 
 
 
 
Net tax loss carryforwards
$
1,567

 
$
1,483

 
Accrued liabilities and deferred revenue
276

 
297

 
Tax credits
76

 
75

 
Depreciation and amortization
13

 
23

 
Acquisition and integration-related liabilities
13

 
8

 
Provision for doubtful accounts
7

 
7

 
Unrealized hedge loss

 
1

 
Other
46

 
57

 
Valuation allowance (a)
(351
)
 
(319
)
Deferred income tax assets
1,647

 
1,632

 
 
 
 
 
Deferred income tax liabilities:
 
 
 
 
Depreciation and amortization
123

 
96

 
Prepaid expenses
29

 
21

 
Other
7

 
4

Deferred income tax liabilities
159

 
121

Deferred income tax assets, net
$
1,488

 
$
1,511

__________
(a) 
The valuation allowance of $351 million at December 31, 2015 relates to tax loss carryforwards, foreign tax credits and certain deferred tax assets of $267 million, $53 million and $31 million, respectively. The valuation allowance will be reduced when and if the Company determines it is more likely than not that the related deferred income tax assets will be realized. The valuation allowance of $319 million at December 31, 2014 relates to tax loss carryforwards, foreign tax credits and certain deferred tax assets of $249 million, $46 million and $24 million, respectively.
Reconciliation of U.S Federal Income Tax Statutory Rate and Effective Income Tax Rate
The reconciliation between the U.S. federal income tax statutory rate and the Company’s effective income tax rate is as follows:
 
 
Year Ended December 31,
 
 
2015
 
2014
 
2013
U.S. federal statutory rate
35.0
 %
 
35.0
 %
 
35.0
 %
Adjustments to reconcile to the effective rate:
 
 
 
 
 
 
State and local income taxes, net of federal tax benefits
2.8

 
3.3

 
4.1

 
Changes in valuation allowances (a)
(0.6
)
 
(3.0
)
 
15.5

 
Taxes on foreign operations at rates different than statutory U.S. federal rates
3.7

 
1.4

 
5.9

 
Resolution of a prior-year tax matter (b)
(25.6
)
 

 

 
Non-deductible debt extinguishment costs

 

 
18.8

 
Non-deductible transaction-related costs
0.9

 

 
3.2

 
Other non-deductible expenses
1.8

 
0.9

 
2.3

 
Other
0.1

 
(0.1
)
 
(1.3
)
 
 
18.1
 %
 
37.5
 %
 
83.5
 %

__________
(a) 
For the year ended December 31, 2013, includes 13.1% related to our impairment expense.
(b) 
For the year ended December 31, 2015, the Company recognized a $98 million income tax benefit from the resolution of a prior-year income tax matter.

Changes in Gross Unrecognized Tax Benefits
The following is a tabular reconciliation of the gross amount of unrecognized tax benefits for the year:
 
 
2015
 
2014
 
2013
Balance at January 1
$
63

 
$
63

 
$
54

 
Additions for tax positions related to current year
6

 
5

 
4

 
Additions for tax positions for prior years
3

 
5

 
9

 
Reductions for tax positions for prior years
(14
)
 
(8
)
 

 
Settlements
(1
)
 
(2
)
 

 
Statute of limitations
(1
)
 

 
(4
)
Balance at December 31
$
56

 
$
63

 
$
63

Unrecognized Tax Benefits
The following table presents unrecognized tax benefits: 
 
As of December 31,
 
2015
 
2014
Unrecognized tax benefit in non-current income taxes payable (a)
$
37

 
$
45

Accrued interest payable on potential tax liabilities (b)
28

 
30

__________
(a) 
Pursuant to the agreements governing the disposition of certain subsidiaries in 2006, the Company is entitled to indemnification for certain pre-disposition tax contingencies. As of December 31, 2015 and 2014, $15 million and $16 million, respectively, of unrecognized tax benefits are related to tax contingencies for which the Company believes it is entitled to indemnification.
(b) 
The Company recognizes potential interest related to unrecognized tax benefits within interest expense related to corporate debt, net on the accompanying Consolidated Statements of Operations. Penalties incurred during the years ended December 31, 2015, 2014 and 2013, were not significant and were recognized as a component of the provision for income taxes.
Vehicle Programs  
Income Taxes [Line Items]  
Deferred Income Tax Assets and Liabilities
Deferred income tax assets and liabilities related to vehicle programs are comprised of the following: 
 
As of December 31,
 
2015
 
2014
Deferred income tax assets:
 
 
 
Depreciation and amortization
$
53

 
$
54

 
 
 
 
Deferred income tax liabilities:
 
 
 
Depreciation and amortization
2,420

 
2,321

Deferred income tax liabilities under vehicle programs, net
$
2,367

 
$
2,267