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Nature of Business	12 Months Ended
Nature of Business	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	Nature of Business The accompanying financial statements represent the consolidated accounts of Iron Mountain Incorporated, a Delaware corporation (“IMI”), and its subsidiaries (“we” or “us”). We help organizations around the world protect their information, reduce storage rental costs, comply with regulations, facilitate corporate disaster recovery, and better use their information and information technology ("IT") infrastructure for business advantages, regardless of its format, location or life cycle stage. We do this by storing physical records and data backup media, offering information management solutions, and providing data center space for enterprise-class colocation and opportunistic hyperscale data center deployments. We offer comprehensive records and information management services and data management services, along with the expertise and experience to address complex storage and information management challenges such as rising storage rental costs, legal and regulatory compliance, and disaster recovery requirements. We provide secure and reliable data center facilities to protect digital information and ensure the continued operation of our customers’ IT infrastructure, with reliable and flexible deployment options. In October 2019, we announced a global program designed to better position us for future growth and achievement of our strategic objectives (“Project Summit”). Project Summit focuses on simplifying our global structure by combining our core records and information management operations under one global leader and rebalancing our resources, streamlining managerial structures and leveraging our global and regional customer facing resources. We are also implementing systems and process changes designed to make our organization more agile and dynamic, streamline our organization and reallocate our resources to better align with our strategic goals as part of Project Summit. The activities associated with Project Summit began in the fourth quarter of 2019 and are expected to be substantially complete by the end of 2021. See Note 2.h., Note 9 and Note 14. On January 1, 2019, we adopted Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842), as amended ("ASU 2016-02"). See Note 2.m. On January 10, 2018, we completed the acquisition of IO Data Centers, LLC ("IODC"). See Note 6. On January 1, 2018, we adopted ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09"). See Note 2.l. We have been organized and have operated as a real estate investment trust for United States federal income tax purposes ("REIT") beginning with our taxable year ended December 31, 2014.