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Debt and Credit Agreements (Tables)
 6 Months Ended
Jun. 29, 2012
Debt Disclosure [Abstract]  
Activity related to long-term debt
Total activity related to long-term debt as of the end of second quarter 2012 was as follows:
(Dollars in millions)
Current Portion
Long-term Portion
Total
Long-term debt as of December 2011
$
507

$
8,734

$
9,241

2012 activity:
 
 
 
Long-term debt issued
—

300

300

Long-term debt repaid
(455
)
—

(455
)
Reclassifications
457

(457
)
—

Capital lease additions
—

7

7

Debt conversions to CSX stock
(1
)
—

(1
)
Discount and premium activity
—

(3
)
(3
)
Long-term debt as of the end of second quarter 2012
$
508

$
8,581

$
9,089