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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2014
Income Tax Disclosure [Abstract]  
Changes in unrecognized tax benefits
The following table reflects changes in unrecognized tax benefits for the three months ended March 31, 2014:
 
 
(In millions)
Gross amounts of unrecognized tax benefits as of January 1, 2014
$
334

Increases related to prior period tax positions

Decreases related to prior period tax positions

Increases related to current period tax positions
4

Settlements
(3
)
Gross amounts of unrecognized tax benefits as of March 31, 2014
$
335