Derivative, Payment to Terminate

No definition available.

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Namespace Prefix:	sbac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of face value price for issuance of term loan.

+ References

No definition available.

+ Details

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Namespace Prefix:	sbac_
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Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The average effective interest rate during the reporting period.

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-Publisher FASB
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+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

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+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Balance Type:	debit
Period Type:	instant

- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Nominal or face amount used to calculate payments on the derivative liability.

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+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Amount of cash outflow for the payment of debt classified as other, maturing after one year or the operating cycle, if longer.

+ References

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- Details

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- Details

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Debt (Term Loan under the Senior Credit Agreement) (Narrative) (Details) - USD ($)			12 Months Ended
	Aug. 04, 2020	Apr. 11, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt instrument, principal amount			$ 11,180,000,000	$ 10,414,000,000
Repayment of term loans			24,000,000	24,000,000	$ 1,947,000,000
2018 Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 2,400,000,000	$ 2,340,000,000	$ 2,364,000,000
Debt instrument, maturity date			Apr. 11, 2025
Percentage of par value price for issuance of term loan		99.75%
Accruing interest rate during the period			1.90%
Quarterly payments			$ 6,000,000.0
Financing fees		$ 16,800,000
Repayment of term loans			24,000,000.0
Debt instrument, principal balance			2,300,000,000
2018 Term Loan [Member] \| Cash Flow Hedges [Member]
Debt Instrument [Line Items]
Notional amount	$ 1,950,000,000
Payment to terminate	176,200,000
2018 Term Loan [Member] \| Interest Rate Swap [Member]
Debt Instrument [Line Items]
Notional amount	$ 1,950,000,000		$ 1,950,000,000
Derivative fixed interest rate	1.874%		1.874%
2014 and 2015 Term Loans [Member]
Debt Instrument [Line Items]
Repayment of term loans		$ 1,930,000,000
Base Rate [Member] \| 2018 Term Loan [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate		0.75%
Eurodollar [Member] \| 2018 Term Loan [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate		1.75%
London Interbank Offered Rate (LIBOR) [Member] \| 2018 Term Loan [Member] \| Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative basis spread on variable interest rate	1.75%		1.75%
Minimum [Member] \| Base Rate [Member] \| 2018 Term Loan [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate		0.00%
Minimum [Member] \| Eurodollar [Member] \| 2018 Term Loan [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate		0.00%