(Stated in millions)

	2018		2017
4.00% Senior Notes due 2025	$	1,742	$	1,741
3.30% Senior Notes due 2021		1,596		1,595
3.00% Senior Notes due 2020		1,596		1,593
3.65% Senior Notes due 2023		1,493		1,492
4.20% Senior Notes due 2021		1,100		1,100
2.40% Senior Notes due 2022		997		996
3.63% Senior Notes due 2022		847		846
1.00% Guaranteed Notes due 2026		678		-
2.65% Senior Notes due 2022		598		598
2.20% Senior Notes due 2020		499		498
7.00% Notes due 2038		210		212
4.50% Notes due 2021		132		135
5.95% Notes due 2041		115		115
3.60% Notes due 2022		109		110
5.13% Notes due 2043		99		99
4.00% Notes due 2023		82		82
3.70% Notes due 2024		55		56
0.63% Guaranteed Notes due 2019		-		712
1.50% Guaranteed Notes due 2019		-		603
Commercial paper borrowings		2,433		1,694
Other		263		598
	$	14,644	$	14,875

Schlumberger Limited fully and unconditionally guarantees the securities issued by certain of its subsidiaries, including securities issued by Schlumberger Investment SA, a wholly-owned finance subsidiary of Schlumberger.

At December 31, 2018, Schlumberger had separate committed credit facility agreements aggregating $6.5 billion with commercial banks, of which $4.1 billion was available and unused. These committed facilities support commercial paper programs in the United States and Europe, and $1.0 billion matures in February 2019, $1.5 billion matures in November 2020, $2.0 billion matures in February 2022 and $2.0 billion matures in February 2023. Interest rates and other terms of borrowing under these lines of credit vary from country to country.

During the fourth quarter of 2018, Schlumberger issued €600 million of 1.00% Guaranteed Notes due 2026.

Commercial paper borrowings are classified as long-term debt to the extent they are backed up by available and unused committed credit facilities maturing in more than one year and to the extent it is Schlumberger’s intent to maintain these obligations for longer than one year. Borrowings under the commercial paper programs at December 31, 2018 were $2.4 billion, all of which was classified within Long-term debt in the Consolidated Balance Sheet. At December 31, 2017, borrowings under the commercial paper programs were $3.0 billion, of which $1.7 billion was classified within Long-term debt and $1.3 billion was classified in Short-term borrowings and current portion of long-term debt in the Consolidated Balance Sheet.

The weighted average interest rate on variable rate debt as of December 31, 2018 was 3.5%.

Long-term Debt as of December 31, 2018 is due as follows: $2.1 billion in 2020, $3.1 billion in 2021, $4.4 billion in 2022, $2.1 billion in 2023, $1.8 billion in 2025, $0.7 billion in 2026 and $0.4 billion thereafter.

The fair value of Schlumberger’s Long-term Debt at December 31, 2018 and December 31, 2017 was $14.6 billion and $15.2 billion, respectively, and was estimated based on quoted market prices.