Debt (Tables)

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Fair value and carrying value of long-term debt, including current maturities

The approximate fair value and related carrying value of the Company's total long-term debt, including current maturities of long-term debt presented as short-term debt, as of September 30, 2015 and December 31, 2014 were as follows:

In millions	September 30, 2015		December 31, 2014
Fair value	$	7,252	$	6,431
Carrying value	7,002		5,982