	June 30,			December 31,
	2020			2019
Current portion of long-term debt
2.700% Senior Notes due 2020	$	-		$	1,500.0
Floating Rate Notes due 2021		450.0			-
Total current portion of long-term debt	$	450.0		$	1,500.0
Long-term debt
Floating Rate Notes due 2021	$	-		$	450.0
3.375% Senior Notes due 2021		300.0			300.0
3.150% Senior Notes due 2022		750.0			750.0
3.700% Senior Notes due 2023		300.0			300.0
3.550% Senior Notes due 2025		2,000.0			2,000.0
3.050% Senior Notes due 2026		600.0			-
3.550% Senior Notes due 2030		900.0			-
4.250% Senior Notes due 2035		253.4			253.4
5.750% Senior Notes due 2039		317.8			317.8
4.450% Senior Notes due 2045		395.4			395.4
1.414% Euro Notes due 2022		561.6			561.3
2.425% Euro Notes due 2026		561.6			561.3
1.164% Euro Notes due 2027		561.6			561.3
Japan Term Loan A		108.6			106.9
Japan Term Loan B		197.8			194.7
Debt discount and issuance costs		(53.2	)		(37.1	)
Adjustment related to interest rate swaps		4.7			6.4
Total long-term debt	$	7,759.3		$	6,721.4

At June 30, 2020, our total current and non-current debt of $8.2 billion consisted of $8.0 billion aggregate principal amount of our senior notes, which included $1.7 billion of Euro-denominated senior notes (“Euro Notes”), an 11.7 billion Japanese Yen term loan agreement (“Japan Term Loan A”) and a 21.3 billion Japanese Yen term loan agreement (“Japan Term Loan B”) that will each mature on September 27, 2022, and fair value adjustments totaling $4.7 million, partially offset by debt discount and issuance costs of $53.2 million.

On March 20, 2020, we completed the offering of $600.0 million aggregate principal amount of our 3.050% senior notes due on January 15, 2026 and $900.0 million aggregate principal amount of our 3.550% senior notes due on March 20, 2030. Interest payable on the 3.050% senior notes is payable semi-annually, commencing on July 15, 2020 until maturity. Interest payable on the 3.550% senior notes is payable semi-annually, commencing on September 20, 2020 until maturity. The proceeds from the offering, together with cash on hand, were used to repay at maturity the $1.5 billion principal amount of 2.700% senior notes due on April 1, 2020.

On November 1, 2019, we entered into a revolving credit agreement (the “2019 Credit Agreement”), which contains a five-year unsecured multicurrency revolving facility of $1.5 billion (the “2019 Multicurrency Revolving Facility”), which replaced the previous $1.5 billion multicurrency revolving credit facility (the “2016 Multicurrency Revolving Facility”) and U.S term loan (“U.S Term Loan B”) under our credit agreement executed in September 2016 (as amended, the “2016 Credit Agreement”). U.S. Term Loan B was paid in full during the six months ended June 30, 2019. The 2019 Credit Agreement will mature on November 1, 2024, with two one-year extensions exercisable at our discretion and subject to required lender consent. As of June 30, 2020, there were no outstanding borrowings under the 2019 Multicurrency Revolving Facility.

Borrowings under the 2019 Credit Agreement generally bear interest at floating rates. We pay a facility fee on the aggregate amount of the 2019 Multicurrency Revolving Facility. The 2019 Credit Agreement contains customary affirmative and negative covenants and events of default for unsecured financing arrangements, including, among other things, limitations on consolidations, mergers, and sales of assets. On April 23, 2020, we entered into an amendment to the 2019 Credit Agreement to temporarily increase the maximum permitted consolidated indebtedness to consolidated EBITDA ratio (“Consolidated Leverage Ratio”), temporarily increase the interest rate margin applicable to revolving loans and the facility fee, and make other administrative changes. Pursuant to the amendment, the maximum permitted Consolidated Leverage Ratio as of the last day of any period of four consecutive fiscal quarters under the 2019 Credit Agreement will be (i) 5.75 to 1.00 for periods ending between April 1, 2020 and including December 31, 2020, (ii) 5.00 to 1.00 for the period ending March 31, 2021, and (iii) 4.50 to 1.00 for periods ending after April 1, 2021 (with such maximum permitted Consolidated Leverage Ratio subject to increase to 5.00 to 1.00 for a period of time in connection with a qualified material acquisition on or after July 1, 2021). We were in compliance with all covenants under the 2019 Credit Agreement as of June 30, 2020. The amendment also increases the interest rate margin applicable to revolving loans and the facility fee, each of which are determined by reference to our senior unsecured long-term debt credit rating, through March 31, 2021.

On April 23, 2020, we entered into a revolving credit agreement (the “2020 Credit Agreement”) which is an unsecured revolving credit facility of $1.0 billion (the “2020 Revolving Facility”). The 2020 Credit Agreement matures on December 31, 2020. Borrowings under the 2020 Credit Agreement generally bear interest at floating rates. We pay a facility fee on the aggregate amount of the 2020 Revolving Facility. The 2020 Credit Agreement contains customary affirmative and negative covenants and events of default for unsecured financing arrangement including, among other things, limitations on consolidations, mergers, and sales of assets. The 2020 Credit Agreement requires us to maintain a Consolidated Leverage Ratio as of the last day of any period of four consecutive fiscal quarters of no greater than 5.75 to 1.00. The 2020 Revolving Facility is also subject to certain mandatory prepayment requirements and corresponding commitment reductions upon the issuance of indebtedness above $25.0 million, subject to specified carve-outs. As of June 30, 2020, there were no outstanding borrowings under the 2020 Credit Agreement and we were in compliance with all covenants.

The estimated fair value of our senior notes as of June 30, 2020, based on quoted prices for the specific securities from transactions in over-the-counter markets (Level 2), was $8,450.1 million. The estimated fair value of Japan Term Loan A and Japan Term Loan B, in the aggregate, as of June 30, 2020, based upon publicly available market yield curves and the terms of the debt (Level 2), was $304.8 million.