v3.26.1
BUSINESS SEGMENTS - Summarized Segment Financial Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Segment revenues $ 2,749.1 $ 2,626.9 $ 5,486.6 $ 5,189.7  
Segment selling, general, administrative and development expense 233.8 233.7 491.2 471.2  
OPERATING INCOME 1,268.8 1,197.7 2,508.0 2,451.8  
Stock-based compensation expense 34.2 47.3 92.6 100.7  
Other selling, general, administrative and development expense 63.5 58.9 128.3 117.5  
Depreciation, amortization and accretion 514.4 510.3 1,032.6 1,002.8  
Other expense 250.3 682.4 490.8 1,263.2  
Income from continuing operations before income taxes 1,009.3 511.8 2,027.4 1,129.3  
Total assets 63,300.1 63,754.5 63,300.1 63,754.5 $ 63,190.4
Capital expenditures     788.7 652.9  
Unrealized gains on equity securities 12.0 110.7 36.4 118.3  
Disposal Group, Disposed of by Sale, Not Discontinued Operations | ATC Philippines and Kirtonkhola Tower Bangladesh Limited          
Segment Reporting [Line Items]          
Gain (loss) on sale of subsidiary 20.4   20.4    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | South Africa Fiber          
Segment Reporting [Line Items]          
Gain (loss) on sale of subsidiary       53.6  
U.S. & Canada          
Segment Reporting [Line Items]          
Segment revenues 1,335.7 1,406.6 2,664.9 2,779.5  
Africa & APAC          
Segment Reporting [Line Items]          
Segment revenues 415.3 336.3 793.9 669.9  
Europe          
Segment Reporting [Line Items]          
Segment revenues 259.4 232.7 520.1 445.7  
Latin America          
Segment Reporting [Line Items]          
Segment revenues 441.6 389.4 921.7 788.6  
Data Centers          
Segment Reporting [Line Items]          
Segment revenues 297.1 261.9 586.0 506.0  
Operating Segments          
Segment Reporting [Line Items]          
Segment revenues 2,749.1 2,626.9 5,486.6 5,189.7  
Segment operating expenses 741.3 688.7 1,444.6 1,323.2  
Segment gross margin 2,007.8 1,938.2 4,042.0 3,866.5  
Segment selling, general, administrative and development expense 136.1 127.5 270.3 253.0  
OPERATING INCOME 1,871.7 1,810.7 3,771.7 3,613.5  
Operating Segments | Total  Property          
Segment Reporting [Line Items]          
Segment revenues 2,687.8 2,527.4 5,357.7 5,015.6  
Segment operating expenses 707.9 640.6 1,372.7 1,240.2  
Segment gross margin 1,979.9 1,886.8 3,985.0 3,775.4  
Segment selling, general, administrative and development expense 130.4 121.0 259.3 240.1  
OPERATING INCOME 1,849.5 1,765.8 3,725.7 3,535.3  
Total assets 62,884.6 63,087.0 62,884.6 63,087.0  
Capital expenditures     780.9 649.0  
Operating Segments | U.S. & Canada          
Segment Reporting [Line Items]          
Segment revenues 1,274.4 1,307.1 2,536.0 2,605.4  
Segment operating expenses 220.4 222.2 426.7 424.5  
Segment gross margin 1,054.0 1,084.9 2,109.3 2,180.9  
Segment selling, general, administrative and development expense 41.9 41.3 80.2 80.6  
OPERATING INCOME 1,012.1 1,043.6 2,029.1 2,100.3  
Total assets 26,401.2 26,889.9 26,401.2 26,889.9  
Capital expenditures     164.5 160.5  
Operating Segments | Africa & APAC          
Segment Reporting [Line Items]          
Segment revenues 415.3 336.3 793.9 669.9  
Segment operating expenses 146.8 104.5 266.9 203.8  
Segment gross margin 268.5 231.8 527.0 466.1  
Segment selling, general, administrative and development expense 22.2 18.9 40.9 39.0  
OPERATING INCOME 246.3 212.9 486.1 427.1  
Total assets 4,363.8 4,234.9 4,363.8 4,234.9  
Capital expenditures     73.3 99.8  
Operating Segments | Europe          
Segment Reporting [Line Items]          
Segment revenues 259.4 232.7 520.1 445.7  
Segment operating expenses 96.1 86.6 188.6 162.6  
Segment gross margin 163.3 146.1 331.5 283.1  
Segment selling, general, administrative and development expense 15.9 14.6 33.2 30.4  
OPERATING INCOME 147.4 131.5 298.3 252.7  
Total assets 12,591.0 12,884.5 12,591.0 12,884.5  
Capital expenditures     128.8 106.5  
Operating Segments | Latin America          
Segment Reporting [Line Items]          
Segment revenues 441.6 389.4 921.7 788.6  
Segment operating expenses 130.8 124.4 264.6 247.1  
Segment gross margin 310.8 265.0 657.1 541.5  
Segment selling, general, administrative and development expense 23.7 27.1 53.8 48.1  
OPERATING INCOME 287.1 237.9 603.3 493.4  
Total assets 8,742.1 8,372.4 8,742.1 8,372.4  
Capital expenditures     73.0 57.9  
Operating Segments | Data Centers          
Segment Reporting [Line Items]          
Segment revenues 297.1 261.9 586.0 506.0  
Segment operating expenses 113.8 102.9 225.9 202.2  
Segment gross margin 183.3 159.0 360.1 303.8  
Segment selling, general, administrative and development expense 26.7 19.1 51.2 42.0  
OPERATING INCOME 156.6 139.9 308.9 261.8  
Total assets 10,786.5 10,705.3 10,786.5 10,705.3  
Capital expenditures     341.3 224.3  
Operating Segments | Services          
Segment Reporting [Line Items]          
Segment revenues 61.3 99.5 128.9 174.1  
Segment operating expenses 33.4 48.1 71.9 83.0  
Segment gross margin 27.9 51.4 57.0 91.1  
Segment selling, general, administrative and development expense 5.7 6.5 11.0 12.9  
OPERATING INCOME 22.2 44.9 46.0 78.2  
Total assets 79.3 139.0 79.3 139.0  
Capital expenditures     0.0 0.0  
Other          
Segment Reporting [Line Items]          
Stock-based compensation expense 34.2 47.3 92.6 100.7  
Other selling, general, administrative and development expense 63.5 58.9 128.3 117.5  
Depreciation, amortization and accretion 514.4 510.3 1,032.6 1,002.8  
Other expense 250.3 682.4 490.8 1,263.2  
Total assets $ 336.2 $ 528.5 336.2 528.5  
Capital expenditures     $ 7.8 $ 3.9