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LONG-TERM OBLIGATIONS (Tables)
 3 Months Ended
Mar. 31, 2025
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt Instruments
Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums and debt issuance costs, consisted of the following:
As of
March 31, 2025December 31, 2024Maturity Date
2021 Multicurrency Credit Facility (1)$50.0 $— January 28, 2028
2021 Term Loan (1)997.5 997.9 January 28, 2028
2021 Credit Facility (1)360.0 — January 28, 2030
2.950% senior notes (2)
— 650.0 January 15, 2025
2.400% senior notes (3)
— 749.7 March 15, 2025
1.375% senior notes (4) (5)
540.8 517.3 April 4, 2025
4.000% senior notes
749.8 749.4 June 1, 2025
1.300% senior notes
499.5 499.3 September 15, 2025
4.400% senior notes
499.5 499.3 February 15, 2026
1.600% senior notes
698.8 698.5 April 15, 2026
1.950% senior notes (5)
539.7 516.4 May 22, 2026
1.450% senior notes
597.8 597.4 September 15, 2026
3.375% senior notes
997.0 996.6 October 15, 2026
3.125% senior notes
399.4 399.3 January 15, 2027
2.750% senior notes
748.2 748.0 January 15, 2027
0.450% senior notes (5)
809.1 774.1 January 15, 2027
0.400% senior notes (5)
538.5 515.0 February 15, 2027
3.650% senior notes
646.8 646.4 March 15, 2027
4.125% senior notes (5)
646.6 618.5 May 16, 2027
3.55% senior notes
748.1 747.9 July 15, 2027
3.600% senior notes
697.2 697.0 January 15, 2028
0.500% senior notes (5)
807.7 772.6 January 15, 2028
1.500% senior notes
648.0 647.8 January 31, 2028
5.500% senior notes
695.4 695.0 March 15, 2028
5.250% senior notes
645.5 645.2 July 15, 2028
5.800% senior notes
744.9 744.6 November 15, 2028
5.200% senior notes
644.1 643.7 February 15, 2029
3.950% senior notes
595.1 594.8 March 15, 2029
0.875% senior notes (5)
808.0 773.0 May 21, 2029
3.800% senior notes
1,641.0 1,640.5 August 15, 2029
2.900% senior notes
745.4 745.1 January 15, 2030
5.000% senior notes
593.5 593.2 January 31, 2030
4.900% senior notes
643.9 — March 15, 2030
3.900% senior notes (5)
536.2 512.9 May 16, 2030
2.100% senior notes
744.4 744.1 June 15, 2030
0.950% senior notes (5)
536.0 512.6 October 5, 2030
1.875% senior notes
794.5 794.3 October 15, 2030
2.700% senior notes
695.8 695.6 April 15, 2031
4.625% senior notes (5)
535.0 511.7 May 16, 2031
2.300% senior notes
693.8 693.6 September 15, 2031
1.000% senior notes (5)
697.9 667.6 January 15, 2032
4.050% senior notes
643.9 643.7 March 15, 2032
5.650% senior notes
791.6 791.4 March 15, 2033
1.250% senior notes (5)
535.4 512.1 May 21, 2033
5.550% senior notes
841.6 841.4 July 15, 2033
5.900% senior notes
742.3 742.2 November 15, 2033
5.450% senior notes
640.8 640.6 February 15, 2034
4.100% senior notes (5)
533.8 510.5 May 16, 2034
5.400% senior notes
592.0 591.9 January 31, 2035
5.350% senior notes
346.1 — March 15, 2035
3.700% senior notes
592.6 592.6 October 15, 2049
3.100% senior notes
1,038.9 1,038.8 June 15, 2050
2.950% senior notes
1,024.0 1,023.8 January 15, 2051
Total American Tower Corporation debt 34,533.4 34,174.9 
Series 2015-2 notes (6)524.9 524.7 June 16, 2025
Series 2018-1A securities (7)497.8 497.6 March 15, 2028
Series 2023-1A securities (8)1,288.9 1,288.0 March 15, 2028
Other subsidiary debt (9)1.2 — March 24, 2033
Total American Tower subsidiary debt2,312.8 2,310.3 
Finance lease obligations16.1 16.6 
Total36,862.3 36,501.8 
Less current portion of long-term obligations(2,816.9)(3,693.0)
Long-term obligations$34,045.4 $32,808.8 
_______________
(1)Accrues interest at a variable rate.
(2)Repaid in full on January 14, 2025 using cash on hand and borrowings under the 2021 Multicurrency Credit Facility (as defined below).
(3)Repaid in full on March 14, 2025 using proceeds from the issuance of the 4.900% Notes and 5.350% Notes (each as defined below).
(4)Repaid in full on April 3, 2025 using borrowings under the 2021 Multicurrency Credit Facility and cash on hand.
(5)Notes are denominated in EUR.
(6)Maturity date reflects the anticipated repayment date; final legal maturity is June 15, 2050.
(7)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2048.
(8)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2053.
(9)As of March 31, 2025, includes the Bangladesh Term Loan (as defined below).
The key terms of the Notes are as follows:
Senior NotesAggregate Principal Amount (in millions)Issue Date and Interest Accrual DateMaturity DateContractual Interest RateFirst Interest PaymentInterest Payments Due (1)Par Call Date (2)
4.900% Notes
$650.0 March 14, 2025March 15, 2030
4.900%
September 15, 2025March 15 and September 15February 15, 2030
5.350% Notes
$350.0 March 14, 2025March 15, 2035
5.350%
September 15, 2025March 15 and September 15December 15, 2034
___________
(1)Accrued and unpaid interest on U.S. Dollar (“USD”) denominated notes is payable in USD semi-annually in arrears and will be computed from the issue date on the basis of a 360-day year comprised of twelve 30-day months.
(2)The Company may redeem the Notes at any time, in whole or in part, at a redemption price equal to 100% of the principal amount of the Notes plus a make-whole premium, together with accrued interest to the redemption date. If the Company redeems the Notes on or after the par call date, the Company will not be required to pay a make-whole premium.
As of March 31, 2025, the key terms under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility and the 2021 Term Loan were as follows:
Outstanding Principal Balance
(in millions)		Undrawn letters of credit
(in millions)		Maturity DateCurrent margin over SOFR or EURIBOR (1)Current commitment fee (2)
2021 Multicurrency Credit Facility$50.0 $5.2 January 28, 2028(3)1.000 %0.110 %
2021 Credit Facility360.0 30.3 January 28, 2030(3)1.000 %0.110 %
2021 Term Loan1,000.0 N/AJanuary 28, 20281.000 %N/A
_______________
(1)Secured Overnight Financing Rate (“SOFR”) applies to the USD denominated borrowings under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility and the 2021 Term Loan. Euro Interbank Offer Rate (“EURIBOR”) applies for EURIBOR based borrowings.
(2)Fee on undrawn portion of each credit facility.
(3)Subject to two optional renewal periods.