Debt (Tables)

3 Months Ended

Mar. 31, 2014

Debt Disclosure [Abstract]

Key Components of Convertible Debt

The following table represents the key components of our interest expense on convertible debt for the three months ended March 31, 2013 (table in millions):

	March 31, 2013
Contractual interest expense on the coupon	$	7
Amortization of the discount component recognized as interest expense	16
Total interest expense on the convertible debt	$	23

Our long-term debt as of March 31, 2014 was as follows (dollars in millions):

Senior Notes	Issued at Discount to Par		Carrying Value
$2.5 billion 1.875% Notes due 2018	99.943	%	$	2,499
$2.0 billion 2.650% Notes due 2020	99.760	%	$	1,996
$1.0 billion 3.375% Notes due 2023	99.925	%	$	999
			$	5,494