Leases - Narrative (Details) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2020
USD ($)
|
Dec. 31, 2019
USD ($)
|
Sep. 14, 2020
USD ($)
tower_site
|
|
| Lessee, Lease, Description [Line Items] | |||
| Operating lease right-of-use assets | $ 28,021 | $ 10,933 | |
| Lease liabilities | 30,587 | ||
| Interest payments for financing leases | 79 | $ 82 | |
| Additional operating leases not yet commenced, payments due | $ 227 | ||
| American Tower | |||
| Lessee, Lease, Description [Line Items] | |||
| Number of licensed towers | tower_site | 20,729 | ||
| Operating lease right-of-use assets | $ 11,000 | ||
| Lease liabilities | $ 11,000 | ||