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Summary of Significant Accounting Policies - Schedule of Changes in Carrying Value of Goodwill, by Reportable Operating Segment (Details) - USD ($) |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 01, 2018 | Oct. 01, 2016 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  |  | $ 4,070,267,000 | $ 3,905,021,000 |
Deductible goodwill acquired during the year |  |  | $ 10,885,000 | 9,895,000 | 10,885,000 |
Non-deductible goodwill acquired during the year |  |  |  | 467,703,000 | 49,503,000 |
Goodwill impairment | $ 0 | $ 0 | (3,011,000) | 0 | (3,011,000) | $ 0
Fair value and other adjustments |  |  |  | 4,469,000 | 6,628,000 |
Currency effects |  |  |  | (110,102,000) | 104,756,000 |
Ending balance |  |  | 4,070,267,000 | 4,441,030,000 | 4,070,267,000 | 3,905,021,000
Goodwill, Purchase Accounting Adjustments, Property, Plant And Equipment, Intangibles, Deferred Income Tax And Other Liabilities |  |  |  | (2,717,000) |  |
Accumulated goodwill impairment |  |  | 135,420,000 | 135,420,000 | 135,420,000 |
Net cash paid and received for previous acquisitions |  |  |  | 23,967,000 | 137,000 | (182,000)
Payments for (Proceeds from) Previous Acquisition From Previous Year |  |  |  | 7,186,000 |  |
North American Records and Information Management Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  |  | 2,269,446,000 | 2,280,911,000 |
Deductible goodwill acquired during the year |  |  | 894,000 | 0 | 894,000 |
Non-deductible goodwill acquired during the year |  |  |  | 0 | 0 |
Goodwill impairment |  |  |  |  | 0 |
Fair value and other adjustments |  |  |  | (423,000) | (25,195,000) |
Currency effects |  |  |  | (16,026,000) | 12,836,000 |
Ending balance |  |  | 2,269,446,000 | 2,251,795,000 | 2,269,446,000 | 2,280,911,000
Accumulated goodwill impairment |  |  | 85,909,000 | 85,909,000 | 85,909,000 |
North American Data Management Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  |  | 497,851,000 | 493,966,000 |
Deductible goodwill acquired during the year |  |  | 0 | 0 | 0 |
Non-deductible goodwill acquired during the year |  |  |  | 0 | 0 |
Goodwill impairment |  |  |  |  | 0 |
Fair value and other adjustments |  |  |  | 0 | 208,000 |
Currency effects |  |  |  | (4,360,000) | 3,677,000 |
Ending balance |  |  | 497,851,000 | 493,491,000 | 497,851,000 | 493,966,000
Accumulated goodwill impairment |  |  | 0 | 0 | 0 |
Western European Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  |  | 396,489,000 | 349,421,000 |
Deductible goodwill acquired during the year |  |  | 0 | 0 | 0 |
Non-deductible goodwill acquired during the year |  |  |  | 5,231,000 | 0 |
Goodwill impairment |  |  |  |  | 0 |
Fair value and other adjustments |  |  |  | 0 | 10,536,000 |
Currency effects |  |  |  | (19,914,000) | 36,532,000 |
Ending balance |  |  | 396,489,000 | 381,806,000 | 396,489,000 | 349,421,000
Accumulated goodwill impairment |  |  | 46,500,000 | 46,500,000 | 46,500,000 |
Other International Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  |  | 846,433,000 | 743,077,000 |
Deductible goodwill acquired during the year |  |  | 9,274,000 | 3,251,000 | 9,274,000 |
Non-deductible goodwill acquired during the year |  |  |  | 28,999,000 | 24,970,000 |
Goodwill impairment |  |  |  |  | 0 |
Fair value and other adjustments |  |  |  | 4,283,000 | 21,079,000 |
Currency effects |  |  |  | (64,743,000) | 51,548,000 |
Ending balance |  |  | 846,433,000 | 818,223,000 | 846,433,000 | 743,077,000
Accumulated goodwill impairment |  |  | 0 | 0 | 0 |
Global Data Center Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  |  | 0 | 0 |
Deductible goodwill acquired during the year |  |  | 0 | 0 | 0 |
Non-deductible goodwill acquired during the year |  |  |  | 429,853,000 | 0 |
Goodwill impairment |  |  |  |  | 0 |
Fair value and other adjustments |  |  |  | 0 | 0 |
Currency effects |  |  |  | (3,897,000) | 0 |
Ending balance |  |  | 0 | 425,956,000 | 0 | 0
Accumulated goodwill impairment |  |  | 0 | 0 | 0 |
Corporate and Other Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  |  | 60,048,000 | 37,646,000 |
Deductible goodwill acquired during the year |  |  | 717,000 | 6,644,000 | 717,000 |
Non-deductible goodwill acquired during the year |  |  |  | 3,620,000 | 24,533,000 |
Goodwill impairment |  |  |  |  | (3,011,000) |
Fair value and other adjustments |  |  |  | 609,000 | 0 |
Currency effects |  |  |  | (1,162,000) | 163,000 |
Ending balance |  |  | 60,048,000 | 69,759,000 | 60,048,000 | $ 37,646,000
Accumulated goodwill impairment |  |  | $ 3,011,000 | 3,011,000 | 3,011,000 |
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  |  | (3,515,000) |
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | North American Records and Information Management Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  |  | 0 |
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | North American Data Management Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  |  | 0 |
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | Western European Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  |  | 0 |
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | Other International Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  |  | (3,515,000) |
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | Global Data Center Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  |  | 0 |
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | Corporate and Other Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  |  | $ 0 |
Disposal Group, Not Discontinued Operations | IMFS |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  | (1,202,000) |  |
Disposal Group, Not Discontinued Operations | IMFS | North American Records and Information Management Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  | (1,202,000) |  |
Disposal Group, Not Discontinued Operations | IMFS | North American Data Management Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  | 0 |  |
Disposal Group, Not Discontinued Operations | IMFS | Western European Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  | 0 |  |
Disposal Group, Not Discontinued Operations | IMFS | Other International Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  | 0 |  |
Disposal Group, Not Discontinued Operations | IMFS | Global Data Center Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  | 0 |  |
Disposal Group, Not Discontinued Operations | IMFS | Corporate and Other Business |  |  |  |  |  |
Gross amount of goodwill [Roll Forward] |  |  |  |  |  |
Goodwill allocated to divested operations |  |  |  | $ 0 |  |

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