Segment Information (Details)
$ in Millions |
3 Months Ended |
7 Months Ended |
12 Months Ended |
|
Jun. 30, 2017
USD ($)
|
Mar. 31, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
Sep. 30, 2016
USD ($)
|
Jun. 30, 2016
USD ($)
|
Mar. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Sep. 30, 2015
USD ($)
|
Jun. 30, 2015
USD ($)
|
Feb. 01, 2015
USD ($)
|
Jun. 30, 2017
USD ($)
segment
|
Jun. 30, 2016
USD ($)
|
| Segment Reporting [Abstract] |
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| Number of reportable segments | segment |
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1
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| Revenue from External Customer [Line Items] |
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| Total revenue |
$ 729.3
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$ 628.8
|
$ 721.8
|
$ 737.7
|
$ 753.9
|
$ 586.4
|
$ 682.6
|
$ 692.0
|
$ 985.5
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$ 2,817.6
|
$ 2,714.9
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| Cloud [Member] |
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| Revenue from External Customer [Line Items] |
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| Total revenue |
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108.9
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501.1
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391.7
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| Security [Member] |
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| Revenue from External Customer [Line Items] |
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| Total revenue |
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65.8
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|
324.1
|
249.4
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| Digital Infrastructure [Member] |
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| Revenue from External Customer [Line Items] |
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| Total revenue |
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$ 810.8
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$ 1,992.4
|
$ 2,073.8
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| Predecessor [Member] |
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| Revenue from External Customer [Line Items] |
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| Total revenue |
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$ 1,392.8
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| Predecessor [Member] | Cloud [Member] |
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| Revenue from External Customer [Line Items] |
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| Total revenue |
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184.1
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| Predecessor [Member] | Security [Member] |
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| Revenue from External Customer [Line Items] |
|
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|
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|
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| Total revenue |
|
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|
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90.5
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| Predecessor [Member] | Digital Infrastructure [Member] |
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| Revenue from External Customer [Line Items] |
|
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|
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| Total revenue |
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$ 1,118.2
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