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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2015
Income Taxes  
Valuation allowance for non-current deferred tax assets

The valuation allowance for our non-current deferred tax assets was as follows (in millions):

 

 

 

March 31,
2015

 

December 31,
2014

 

Valuation allowance for non-current deferred tax assets

 

$

395 

 

$

340 

 

 

Schedule of unrecognized tax benefits, including related interest and penalties

The liabilities related to our unrecognized tax benefits, including related interest and penalties that we recognize as a component of income tax expense, were as follows (in millions):

 

 

 

March 31,
2015

 

December 31,
2014

 

Unrecognized tax benefits, excluding interest and penalties

 

$

271 

 

$

265 

 

Interest and penalties

 

120 

 

120 

 

Unrecognized tax benefits, including interest and penalties

 

$

391 

 

$

385