(in millions)

Beginning
Balance

Additions

Net Deductions
and Other

Ending
Balance

Year ended December 31, 2015 (Successor)

Reserve for doubtful accounts

$

11

4

5

$

10

Deferred tax valuation allowance

$

1,127

182

108

$

1,201

Year ended December 31, 2014 (Successor)

Reserve for doubtful accounts

$

6

5

—

$

11

Deferred tax valuation allowance

$

953

257

83

$

1,127

Four Months ended December 31, 2013 (Successor)

Reserve for doubtful accounts

$

—

6

—

$

6

Deferred tax valuation allowance

$

1,273

157

477

$

953

In connection with the application of fresh start accounting on September 1, 2013, the carrying value of trade receivables was adjusted to fair value, eliminating the reserve for doubtful accounts.

Eight Months ended August 31, 2013 (Predecessor)

Reserve for doubtful accounts

$

30

—

8

$

22

Deferred tax valuation allowance

$

2,838

180

1,745

$

1,273