The carrying value of long-term debt outstanding was as follows at June 30, 2015 and December 31, 2014:



	June 30, 2015		December 31, 2014
	(in millions)
Senior notes:
$500 million, 7.20% due June 15, 2018	$	504	$	504
$300 million, 6.30% due August 1, 2018	310		312
$400 million, 2.625% due October 1, 2019	400		400
$600 million, 3.15% due December 1, 2022	598		598
$600 million, 3.85% due October 1, 2024	599		599
$250 million, 8.15% due June 15, 2038	266		266
$400 million, 4.625% due December 1, 2042	400		400
$750 million, 4.95% due October 1, 2044	746		746
Total long-term debt	$	3,823	$	3,825