Summary of Significant Accounting Policies - Schedule of Changes in Carrying Value of Goodwill, by Reportable Operating Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Gross amount of goodwill [Roll Forward]
Goodwill	$ 4,465,378	$ 4,441,030
Non-deductible goodwill acquired during the year	10,632
Goodwill, Deductible, Acquired During Period	5,501
Goodwill, Purchase Accounting Adjustments	2,134
Fair value and other adjustments	2,565
Currency effects	6,081
Goodwill accumulated amortization [Roll Forward]
Accumulated goodwill impairment, beginning balance	135,420
Accumulated goodwill impairment, ending balance	135,420
Goodwill, Purchase Accounting Adjustments, Offset	431
North American Records and Information Management Business
Gross amount of goodwill [Roll Forward]
Goodwill	2,261,248	2,251,795
Non-deductible goodwill acquired during the year	0
Goodwill, Deductible, Acquired During Period	5,501
Goodwill, Purchase Accounting Adjustments	31
Currency effects	3,921
Goodwill accumulated amortization [Roll Forward]
Accumulated goodwill impairment, beginning balance	85,909
Accumulated goodwill impairment, ending balance	85,909
North American Data Management Business
Gross amount of goodwill [Roll Forward]
Goodwill	494,558	493,491
Non-deductible goodwill acquired during the year	0
Goodwill, Deductible, Acquired During Period	0
Goodwill, Purchase Accounting Adjustments	0
Currency effects	1,067
Goodwill accumulated amortization [Roll Forward]
Accumulated goodwill impairment, beginning balance	0
Accumulated goodwill impairment, ending balance	0
Western European Business
Gross amount of goodwill [Roll Forward]
Goodwill	388,282	381,806
Non-deductible goodwill acquired during the year	4,991
Goodwill, Deductible, Acquired During Period	0
Goodwill, Purchase Accounting Adjustments	92
Currency effects	1,393
Goodwill accumulated amortization [Roll Forward]
Accumulated goodwill impairment, beginning balance	46,500
Accumulated goodwill impairment, ending balance	46,500
Other International Business
Gross amount of goodwill [Roll Forward]
Goodwill	826,466	818,223
Non-deductible goodwill acquired during the year	3,767
Goodwill, Deductible, Acquired During Period	0
Goodwill, Purchase Accounting Adjustments	3,350
Currency effects	1,126
Goodwill accumulated amortization [Roll Forward]
Accumulated goodwill impairment, beginning balance	0
Accumulated goodwill impairment, ending balance	0
Global Data Center Business
Gross amount of goodwill [Roll Forward]
Goodwill	423,519	425,956
Non-deductible goodwill acquired during the year	0
Goodwill, Deductible, Acquired During Period	0
Goodwill, Purchase Accounting Adjustments	(871)
Currency effects	(1,566)
Goodwill accumulated amortization [Roll Forward]
Accumulated goodwill impairment, beginning balance	0
Accumulated goodwill impairment, ending balance	0
Corporate and Other
Gross amount of goodwill [Roll Forward]
Goodwill	71,305	$ 69,759
Non-deductible goodwill acquired during the year	1,874
Goodwill, Deductible, Acquired During Period	0
Goodwill, Purchase Accounting Adjustments	(468)
Currency effects	140
Goodwill accumulated amortization [Roll Forward]
Accumulated goodwill impairment, beginning balance	3,011
Accumulated goodwill impairment, ending balance	$ 3,011