(Stated in millions)

	Jun. 30,		Dec. 31,
	2020		2019
3.65% Senior Notes due 2023	$	1,495	$	1,495
3.90% Senior Notes due 2028		1,447		1,444
1.375% Guaranteed Notes due 2026		1,119		-
2.00% Guaranteed Notes due 2032		1,119		-
0.25% Notes due 2027		1,008		550
0.50% Notes due 2031		1,008		544
2.40% Senior Notes due 2022		999		998
4.00% Senior Notes due 2025		929		929
2.65% Senior Notes due 2030		892		-
4.30% Senior Notes due 2029		845		845
3.75% Senior Notes due 2024		746		746
1.00% Guaranteed Notes due 2026		671		665
3.30% Senior Notes due 2021		664		1,597
2.65% Senior Notes due 2022		598		598
0.00% Notes due 2024		560		551
3.63% Senior Notes due 2022		295		294
7.00% Notes due 2038		207		208
5.95% Notes due 2041		114		114
5.13% Notes due 2043		99		99
4.00% Notes due 2023		81		81
3.70% Notes due 2024		55		55
4.20% Senior Notes due 2021		-		600
Commercial paper borrowings		1,812		2,222
Other		-		135
	$	16,763	$	14,770

The estimated fair value of Schlumberger’s Long-term Debt, based on quoted market prices at June 30, 2020 and December 31, 2019, was $17.3 billion and $15.3 billion, respectively.

During the second quarter of 2020, Schlumberger entered into a €1.54 billion committed revolving credit facility. This one-year facility can be extended at Schlumberger’s option for up to an additional year. No amounts have been drawn under this facility.

At June 30, 2020, Schlumberger had separate committed credit facility agreements aggregating $7.98 billion with commercial banks, of which $6.17 billion was available and unused. These committed facilities support commercial paper programs in the United States and Europe, of which $1.73 billion matures in April 2021, $2.75 billion matures in February 2023, $1.5 billion matures in July 2024 and $2.0 billion matures in February 2025. Interest rates and other terms of borrowing under these lines of credit vary by facility.

Borrowings under the commercial paper programs at June 30, 2020 were $1.81 billion, all of which was classified in Long-term debt in the Consolidated Balance Sheet. At December 31, 2019, borrowings under the commercial paper programs were $2.22 billion, all of which was classified in Long-term debt in the Consolidated Balance Sheet.

During the first quarter of 2020, Schlumberger issued €400 million of 0.25% Notes due 2027 and €400 million of 0.50% Notes due 2031.

During the second quarter of 2020, Schlumberger issued €1.0 billion of 1.375% Guaranteed Notes due 2026, $900 million of 2.65% Senior Notes due 2030 and €1.0 billion of 2.00% Guaranteed Notes due 2032.

During the second quarter of 2020, Schlumberger repurchased all $600 million of its 4.20% Senior Notes due 2021 and $935 million of its 3.30% Senior Notes due 2021. Schlumberger paid a premium of approximately $40 million in connection with these repurchases. This premium was classified in Impairments & other in the Consolidated Statement of Income (Loss). See Note 2 – Charge and Credits.

During the second quarter of 2020, Schlumberger established a €5.0 billion Guaranteed Euro Medium Term Note program that provides for the issuance of various types of debt instruments such as fixed or floating rate notes in euro, US dollar or other currencies. Schlumberger has not issued any debt under this program.