10. Long-term Debt

A summary of Long-term Debt follows:

	(Stated in millions)
	Sept. 30,		Dec. 31,
	2014		2013
3.30% Senior Notes due 2021	$	1,596	$	1,596
3.65% Senior Notes due 2023		1,495		1,495
2.75% Guaranteed Notes due 2015		1,273		1,373
1.95% Senior Notes due 2016		1,099		1,099
4.20% Senior Notes due 2021		1,100		1,099
1.25% Senior Notes due 2017		1,000		999
2.40% Senior Notes due 2022		999		999
1.50% Guaranteed Notes due 2019		656		697
2.65% Senior Notes due 2016		500		500
Commercial paper borrowings		1,392		—
Other		516		536
	$	11,626	$	10,393

The estimated fair value of Schlumberger’s Long-term Debt at September 30, 2014 and December 31, 2013, based on quoted market prices, was $11.9 billion and $10.4 billion, respectively.

Borrowings under the commercial paper program at September 30, 2014 were $1.4 billion, all of which were classified within Long-term debt in the Consolidated Balance Sheet. At December 31, 2013, borrowings under the commercial paper program were $95 million, all of which were classified within Long-term debt – current portion in the Consolidated Balance Sheet.