CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues:
Total Revenues	$ 6,901,737	$ 6,149,909	$ 5,480,289
Operating Expenses:
Cost of sales (excluding depreciation and amortization)	3,079,480	2,696,549	2,357,800
Selling, general and administrative	1,393,902	1,339,539	1,236,287
Depreciation and amortization	1,024,435	900,905	776,159
Acquisition and Integration Costs	19,545	35,842	25,875
Restructuring and other transformation	195,912	161,359	175,215
Loss (gain) on disposal/write-down of property, plant and equipment, net	24,641	6,196	(12,825)
Total Operating Expenses	5,737,915	5,140,390	4,558,511
Operating Income (Loss)	1,163,822	1,009,519	921,778
Interest Expense, Net (includes Interest Income of $17,127, $14,672 and $12,471 in 2025, 2024 and 2023, respectively)	829,335	721,559	585,932
Other Expense (Income), Net	123,299	43,422	108,640
Net Income (Loss) Before Provision (Benefit) for Income Taxes	211,188	244,538	227,206
Provision (Benefit) for Income Taxes	58,934	60,872	39,943
Net Income (Loss)	152,254	183,666	187,263
Less: Net income (loss) attributable to noncontrolling interests	7,663	3,510	3,029
Net Income (Loss) Attributable to Iron Mountain Incorporated	$ 144,591	$ 180,156	$ 184,234
Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:
Basic (in dollars per share)	$ 0.49	$ 0.61	$ 0.63
Diluted (in dollars per share)	$ 0.49	$ 0.61	$ 0.63
Weighted average common shares outstanding-basic (in shares)	295,403	293,365	291,936
Weighted average common shares outstanding-diluted (in shares)	297,816	296,234	293,965
Storage rental
Revenues:
Total Revenues	$ 4,052,510	$ 3,682,259	$ 3,370,645
Service
Revenues:
Total Revenues	$ 2,849,227	$ 2,467,650	$ 2,109,644