Summary of Significant Accounting Policies - Schedule of Changes in Carrying Value of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	$ 4,441,030
Deductible goodwill acquired during the year	16,117
Non-deductible goodwill acquired during the year	11,553
Fair value and other adjustments	205
Currency effects	(46,910)
Goodwill ending balance	4,421,995
Accumulated goodwill impairment, beginning balance	135,420
Accumulated goodwill impairment, ending balance	135,420
Total fair value and other adjustments	867
Cash received	662
North American Records and Information Management Business
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	2,251,795
Deductible goodwill acquired during the year	5,109
Non-deductible goodwill acquired during the year	0
Fair value and other adjustments	55
Currency effects	5,501
Goodwill ending balance	2,262,460
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 beginning balance	493,491
Deductible goodwill acquired during the year	0
Non-deductible goodwill acquired during the year	0
Fair value and other adjustments	0
Currency effects	1,495
Goodwill ending balance	494,986
Accumulated goodwill impairment, beginning balance	0
Accumulated goodwill impairment, ending balance	0
Western European Business
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	381,806
Deductible goodwill acquired during the year	675
Non-deductible goodwill acquired during the year	5,011
Fair value and other adjustments	(1,012)
Currency effects	(15,717)
Goodwill ending balance	370,763
Accumulated goodwill impairment, beginning balance	46,500
Accumulated goodwill impairment, ending balance	46,500
Other International Business
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	818,223
Deductible goodwill acquired during the year	10,333
Non-deductible goodwill acquired during the year	4,638
Fair value and other adjustments	1,321
Currency effects	(32,461)
Goodwill ending balance	802,054
Accumulated goodwill impairment, beginning balance	0
Accumulated goodwill impairment, ending balance	0
Global Data Center Business
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	425,956
Deductible goodwill acquired during the year	0
Non-deductible goodwill acquired during the year	0
Fair value and other adjustments	258
Currency effects	(5,182)
Goodwill ending balance	421,032
Accumulated goodwill impairment, beginning balance	0
Accumulated goodwill impairment, ending balance	0
Corporate and Other Business
Gross amount of goodwill [Roll Forward]
Goodwill beginning balance	69,759
Deductible goodwill acquired during the year	0
Non-deductible goodwill acquired during the year	1,904
Fair value and other adjustments	(417)
Currency effects	(546)
Goodwill ending balance	70,700
Accumulated goodwill impairment, beginning balance	3,011
Accumulated goodwill impairment, ending balance	$ 3,011