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LONG-TERM OBLIGATIONS (Tables)
 12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums, debt issuance costs and fair value adjustments due to interest rate swaps consisted of the following:
As of
December 31, 2021December 31, 2020Contractual Interest Rate (1)Maturity Date (1)
2020 Term Loan (2)— 749.4 N/AN/A
2021 Multicurrency Credit Facility (3) (4)4,388.4 — 1.205 %June 30, 2025
2021 Term Loan (3) 995.4 996.1 1.235 %January 31, 2027
2021 Credit Facility (3)1,410.0 2,295.0 1.234 %January 31, 2027
2021 EUR Three Year Delayed Draw Term Loan (3) (4)937.6 — 1.125 %May 28, 2024
2021 USD 364-Day Delayed Draw Term Loan (3) 2,998.5 — 1.250 %December 28, 2022
2021 USD Two Year Delayed Draw Term Loan (3) 1,498.4 — 1.250 %December 28, 2023
2.250% senior notes (5)
600.3 605.1 2.250 %January 15, 2022
4.70% senior notes (6)
— 699.0 4.700 %N/A
3.50% senior notes
997.9 996.1 3.500 %January 31, 2023
3.000% senior notes
709.9 721.9 3.000 %June 15, 2023
0.600% senior notes
497.9 496.8 0.600 %January 15, 2024
5.00% senior notes
1,000.9 1,001.3 5.000 %February 15, 2024
3.375% senior notes
647.0 645.7 3.375 %May 15, 2024
2.950% senior notes
644.7 643.1 2.950 %January 15, 2025
2.400% senior notes
746.1 745.0 2.400 %March 15, 2025
1.375% senior notes (7)
563.8 604.1 1.375 %April 4, 2025
4.000% senior notes
745.5 744.3 4.000 %June 1, 2025
1.300% senior notes
496.4 495.4 1.300 %September 15, 2025
4.400% senior notes
497.6 497.1 4.400 %February 15, 2026
1.600% senior notes
695.2 — 1.600 %April 15, 2026
1.950% senior notes (7)
564.3 605.2 1.950 %May 22, 2026
1.450% senior notes
593.0 — 1.450 %September 15, 2026
3.375% senior notes
991.2 989.5 3.375 %October 15, 2026
3.125% senior notes
398.3 397.9 3.125 %January 15, 2027
2.750% senior notes
745.2 744.3 2.750 %January 15, 2027
0.450% senior notes (7)
847.1 — 0.450 %January 15, 2027
0.400% senior notes (7)
562.5 — 0.400 %February 15, 2027
3.55% senior notes
745.5 744.8 3.550 %July 15, 2027
3.600% senior notes
694.3 693.4 3.600 %January 15, 2028
0.500% senior notes (7)
845.3 907.4 0.500 %January 15, 2028
1.500% senior notes
645.8 645.1 1.500 %January 31, 2028
3.950% senior notes
591.6 590.6 3.950 %March 15, 2029
0.875% senior notes (7)
847.3 — 0.875 %May 21, 2029
3.800% senior notes
1,635.1 1,633.5 3.800 %August 15, 2029
2.900% senior notes
742.5 741.7 2.900 %January 15, 2030
2.100% senior notes
741.2 740.2 2.100 %June 15, 2030
0.950% senior notes (7)
561.0 — 0.950 %October 5, 2030
1.875% senior notes
791.4 790.5 1.875 %October 15, 2030
2.700% senior notes
693.7 — 2.700 %April 15, 2031
2.300% senior notes
691.0 — 2.300 %September 15, 2031
1.000% senior notes (7)
731.7 786.1 1.000 %January 15, 2032
1.250% senior notes (7)
561.2 — 1.250 %May 21, 2033
3.700% senior notes
592.1 591.9 3.700 %October 15, 2049
3.100% senior notes
1,038.0 1,037.7 3.100 %June 15, 2050
2.950% senior notes
1,021.5 538.2 2.950 %January 15, 2051
Total American Tower Corporation debt39,943.3 26,113.4 
Series 2013-2A Securities (8)1,298.2 1,296.6 3.070 %March 15, 2023
Series 2018-1A Securities (8)495.3 494.6 3.652 %March 15, 2028
Series 2015-2 Notes (9)522.7 522.1 3.482 %June 16, 2025
InSite Debt (10)— 800.0 N/AN/A
CoreSite Debt (11)955.1 — VariousVarious
Other subsidiary debt (12)8.0 32.9 VariousVarious
Total American Tower subsidiary debt3,279.3 3,146.2 
Finance lease obligations31.6 27.9 
Total43,254.2 29,287.5 
Less current portion of long-term obligations(4,568.7)(789.8)
Long-term obligations$38,685.5 $28,497.7 
_______________
(1)Reflects interest rate or maturity date as of December 31, 2021; interest rate does not reflect the impact of the interest rate swap agreements.
(2)Repaid in full on February 5, 2021 using borrowings under the 2021 Multicurrency Credit Facility (as defined below) and cash on hand.
(3)Accrues interest at a variable rate.
(4)As of December 31, 2021 reflects borrowings denominated in EUR and, for the 2021 Multicurrency Credit Facility, reflects borrowings denominated in both EUR and U.S. Dollars (“USD”).
(5)Repaid in full on January 14, 2022 using borrowings under the 2021 Credit Facility (as defined below).
(6)Repaid in full on October 18, 2021 with cash on hand.
(7)Notes are denominated in EUR.
(8)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2048.
(9)Maturity date reflects the anticipated repayment date; final legal maturity is June 15, 2050.
(10)Debt entered into by certain InSite subsidiaries assumed in connection with the InSite Acquisition (the “InSite Debt”). On January 15, 2021, all amounts outstanding under the InSite Debt were repaid.
(11)Debt entered into by CoreSite assumed in connection with the CoreSite Acquisition (the “CoreSite Debt”). On January 7, 2022, all amounts outstanding under the CoreSite Debt were repaid using borrowings under the 2021 Multicurrency Credit Facility and cash on hand.
(12)Includes the Kenya Debt and the U.S. Subsidiary Debt (each as defined below). As of December 31, 2020 also included Colombian Credit Facility (as defined below).
As of December 31, 2021, the key terms under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan, the 2021 EUR Three Year Delayed Draw Term Loan, the 2021 USD 364-Day Delayed Draw Term Loan and the 2021 USD Two Year Delayed Draw Term Loan were as follows:
Outstanding Principal BalanceUndrawn letters of creditMaturity DateCurrent margin over LIBOR or EURIBOR (1)Current commitment fee (2)
2021 Multicurrency Credit Facility$4,388.4 $3.5 June 30, 2025(3)1.125 %0.110 %
2021 Credit Facility1,410.0 1.2 January 31, 2027(3)1.125 %0.110 %
2021 Term Loan1,000.0 N/AJanuary 31, 20271.125 %N/A
2021 EUR Three Year Delayed Draw Term Loan938.2 N/AMay 28, 20241.125 %N/A
2021 USD 364-Day Delayed Draw Term Loan3,000.0 N/ADecember 28, 20221.125 %N/A
2021 USD Two Year Delayed Draw Term Loan1,500.0 N/ADecember 28, 20231.125 %N/A
_______________
(1)    LIBOR applies to the USD denominated borrowings under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan, the 2021 USD 364-Day Delayed Draw Term Loan and the 2021 USD Two Year Delayed Draw Term Loan. EURIBOR applies to the EUR denominated borrowings under the 2021 Multicurrency Credit Facility and all of the borrowings under the 2021 EUR Three Year Delayed Draw Term Loan.
(2)    Fee on undrawn portion of each credit facility.
(3)    Subject to two optional renewal periods.
The following table outlines key terms related to the Company’s outstanding senior notes as of December 31, 2021:
Adjustments to Principal Amount (1)
Aggregate Principal Amount20212020Interest
payments due (2)		Issue DatePar Call Date (3)
2.250% Notes (4)
$600.0 $0.3 $5.1 January 15 and July 15September 30, 2016N/A
3.50% Notes
1,000.0 (2.1)(3.9)January 31 and July 31January 8, 2013N/A
3.000% Notes (5)
700.0 9.9 21.9 June 15 and December 15December 8, 2017N/A
0.600% Notes
500.0 (2.1)(3.2)January 15 and July 15November 20, 2020N/A
5.00% Notes (6)
1,000.0 0.9 1.3 February 15 and August 15August 19, 2013N/A
3.375% Notes
650.0 (3.0)(4.3)May 15 and November 15March 15, 2019April 15, 2024
2.950% Notes
650.0 (5.3)(6.9)January 15 and July 15June 13, 2019December 15, 2024
2.400% Notes
750.0 (3.9)(5.0)March 15 and September 15January 10, 2020February 15, 2025
1.375% Notes (7)
568.6 (4.8)(6.7)April 4April 6, 2017January 4, 2025
4.000% Notes
750.0 (4.5)(5.7)June 1 and December 1May 7, 2015March 1, 2025
1.300% Notes
500.0 (3.6)(4.6)March 15 and September 15June 3, 2020August 15, 2025
4.400% Notes
500.0 (2.4)(2.9)February 15 and August 15January 12, 2016November 15, 2025
1.600% Notes
700.0 (4.8)— April 15 and October 15March 29, 2021March 15, 2026
1.950% Notes (7)
568.6 (4.3)(5.6)May 22May 22, 2018February 22, 2026
1.450% Notes
600.0 (7.0)— March 15 and September 15September 27, 2021August 15, 2026
3.375% Notes
1,000.0 (8.8)(10.5)April 15 and October 15May 13, 2016July 15, 2026
3.125% Notes
400.0 (1.7)(2.1)January 15 and July 15September 30, 2016October 15, 2026
2.750% Notes
750.0 (4.8)(5.7)January 15 and July 15October 3, 2019November 15, 2026
0.450% Notes (7)
853.0 (5.9)— January 15May 21, 2021November 15, 2026
0.400% Notes (7)
568.6 (6.1)— February 15October 5, 2021December 15, 2026
3.55% Notes
750.0 (4.5)(5.2)January 15 and July 15June 30, 2017April 15, 2027
3.600% Notes
700.0 (5.7)(6.6)January 15 and July 15December 8, 2017October 15, 2027
0.500% Notes (7)
853.0 (7.7)(8.8)January 15September 10, 2020October 15, 2027
1.500% Notes
650.0 (4.2)(4.9)January 31 and July 31November 20, 2020November 30, 2027
3.950% Notes
600.0 (8.4)(9.4)March 15 and September 15March 15, 2019December 15, 2028
0.875% Notes (7)
853.0 (5.7)— May 21May 21, 2021February 21, 2029
3.800% Notes
1,650.0 (14.9)(16.5)February 15 and August 15June 13, 2019May 15, 2029
2.900% Notes
750.0 (7.5)(8.3)January 15 and July 15January 10, 2020October 15, 2029
2.100% Notes
750.0 (8.8)(9.8)June 15 and December 15June 3, 2020March 15, 2030
0.950% Notes (7)
568.6 (7.6)— October 5October 5, 2021July 5, 2030
1.875% Notes
800.0 (8.6)(9.5)April 15 and October 15September 28, 2020July 15, 2030
2.700% Notes
700.0 (6.3)— April 15 and October 15March 29, 2021January 15, 2031
2.300% Notes
700.0 (9.0)— March 15 and September 15September 27, 2021June 15, 2031
1.000% Notes (7)
739.2 (7.5)(7.9)January 15September 10, 2020October 15, 2031
1.250% Notes (7)
568.6 (7.4)— May 21May 21, 2021February 21, 2033
3.700% Notes
600.0 (7.9)(8.1)April 15 and October 15October 3, 2019April 15, 2049
3.100% Notes (8)
1,050.0 (12.0)(12.3)June 15 and December 15June 3, 2020December 15, 2049
2.950% Notes (9)
1,050.0 (28.5)(11.8)January 15 and July 15November 20, 2020July 15, 2050
_______________
(1)    Includes unamortized discounts, premiums and debt issuance costs and fair value adjustments due to interest rate swaps.
(2)    Accrued and unpaid interest on 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. Interest on EUR denominated notes is payable in EUR annually in arrears and will be computed on the basis of the actual number of days in the period for which interest is being calculated and the actual number of days from and including the last date on which interest was paid on the notes, beginning on the issue date.
(3)    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.
(4)    Includes $0.4 million and $6.3 million fair value adjustment due to interest rate swaps in 2021 and 2020, respectively.
(5)    Includes $11.8 million and $25.1 million fair value adjustment due to interest rate swaps in 2021 and 2020, respectively.
(6)    The original issue date for the 5.00% Notes was August 19, 2013. The issue date for the reopened 5.00% Notes was January 10, 2014.
(7)    Notes are denominated in EUR.
(8)    The original issue date for the initial 3.100% Notes was June 3, 2020. The issue date for the reopened 3.100% Notes was September 28, 2020.
(9)    The original issue date for the initial 2.950% Notes was November 20, 2020. The issue date for the reopened 2.950% Notes was September 27, 2021.
Amounts outstanding and key terms of the India indebtedness consisted of the following as of December 31, 2021 (in millions, except percentages):
Amount Outstanding (INR)Amount Outstanding (USD)Interest Rate (Range)Maturity Date (Range)
Working capital facilities (1)
— $— 
5.09% -8.75%
February 4, 2022 - October 23, 2022
Overdraft facility (2)— $— N/ASeptember 14, 2022
_______________
(1)    7.70 billion Indian Rupees (“INR”) ($103.5 million) of borrowing capacity as of December 31, 2021.
(2)    380.0 million INR ($5.1 million) of borrowing capacity as of December 31, 2021.
Amounts outstanding and key terms of other subsidiary debt consisted of the following as of December 31, (in millions, except percentages):
Carrying Value
(Denominated Currency) (1)		Carrying Value
 (USD) (1)		Interest RateMaturity Date
2021202020212020
Colombian Credit Facility (2)— 40,000.0 $— $11.6 N/AN/A
Kenya Debt (3)7.4 20.1 $7.4 $20.1 8.00 %September 30, 2023
U.S. Subsidiary Debt (4)0.6 1.2 $0.6 $1.2 — %January 1, 2022
_______________
(1)    Includes applicable deferred financing costs.
(2)    Denominated in Colombian Pesos (“COP”), with an original principal amount of 200.0 billion COP. Debt accrued interest at a variable rate. The loan agreement for the Colombian Credit Facility required that the borrower managed exposure to variability in interest rates on certain of the amounts outstanding under the Colombian Credit Facility. On the April 24, 2021 maturity date, all amounts outstanding under the Colombia Credit Facility were repaid.
(3)    Denominated in USD, with an original principal amount of $51.8 million. The loan agreement for the Kenya Debt requires that the debt be paid either (i) in future installments subject to the satisfaction of specified conditions or (ii) three years from the note origination date with an optional two year extension. In October 2021, the optional two year extension was exercised.
(4)    Related to a seller-financed acquisition. Denominated in USD with an original principal amount of $2.5 million.
As of December 31, 2021, the key terms of the CoreSite Debt were as follows:
Carrying ValueInterest RateMaturity Date
2021
2023 Senior unsecured notes$156.7 4.19 %June 15, 2023
2024 Senior unsecured notes185.1 3.91 %April 20, 2024
2026 Senior unsecured notes219.4 4.11 %April 17, 2026
2027 Senior unsecured notes163.9 3.75 %May 6, 2027
2029 Senior unsecured notes230.0 4.31 %April 17, 2029
Total CoreSite Debt$955.1 
Schedule of Maturities of Long-term Debt Aggregate principal maturities of long-term debt, including finance leases, for the next five years and thereafter are expected to be:
Fiscal YearAmount
2022$4,568.7 
20234,512.7 
20243,091.0 
20258,134.5 
20263,370.1 
Thereafter19,820.5 
Total cash obligations43,497.5 
Unamortized discounts, premiums and debt issuance costs and fair value adjustments, net(243.3)
Balance as of December 31, 2021$43,254.2