10. Long-term Debt

A summary of Long-term Debt follows:

	(Stated in millions)
	Jun. 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		1,359		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		694		697
2.65% Senior Notes due 2016		500		500
Commercial paper borrowings		1,472		—
Other		426		536
	$	11,740	$	10,393

The estimated fair value of Schlumberger’s Long-term Debt at June 30, 2014 and December 31, 2013, based on quoted market prices, was $12.0 billion and $10.4 billion, respectively.

Borrowings under the commercial paper program at June 30, 2014 were $2.0 billion, of which $0.5 billion was classified within Long-term debt – current portion in the Consolidated Balance Sheet. At December 31, 2013, borrowings under the commercial paper program were $95 million, all of which was classified within Long-term debt – current portion in the Consolidated Balance Sheet.