Restructuring and Related Costs - Restructuring and Related Liabilities (Details) - USD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
Apr. 30, 2018 |
Apr. 30, 2017 |
Apr. 30, 2018 |
Apr. 30, 2017 |
| Restructuring Reserve [Roll Forward] |
|
|
|
|
|
|
| Balance, beginning of period |
|
|
|
$ 8.4
|
|
|
| Costs recognized |
|
$ 5.3
|
$ 5.8
|
19.6
|
[1] |
$ 10.8
|
| Payments |
|
|
|
(14.9)
|
|
|
| Non-cash charges |
|
|
|
(1.1)
|
|
|
| Balance, end of period |
|
11.9
|
|
11.9
|
|
|
| Employee Severance |
|
|
|
|
|
|
| Restructuring Reserve [Roll Forward] |
|
|
|
|
|
|
| Balance, beginning of period |
|
|
|
2.7
|
|
|
| Costs recognized |
[1] |
|
|
9.3
|
|
|
| Payments |
|
|
|
(6.5)
|
|
|
| Non-cash charges |
|
|
|
0.0
|
|
|
| Balance, end of period |
|
5.5
|
|
5.5
|
|
|
| External Support Fees |
|
|
|
|
|
|
| Restructuring Reserve [Roll Forward] |
|
|
|
|
|
|
| Balance, beginning of period |
|
|
|
2.5
|
|
|
| Costs recognized |
[1] |
|
|
4.0
|
|
|
| Payments |
|
|
|
(6.5)
|
|
|
| Non-cash charges |
|
|
|
0.0
|
|
|
| Balance, end of period |
|
0.0
|
|
0.0
|
|
|
| Lease Exit |
|
|
|
|
|
|
| Restructuring Reserve [Roll Forward] |
|
|
|
|
|
|
| Balance, beginning of period |
|
|
|
2.8
|
|
|
| Costs recognized |
[1] |
|
|
2.5
|
|
|
| Payments |
|
|
|
(0.3)
|
|
|
| Non-cash charges |
|
|
|
(1.1)
|
|
|
| Balance, end of period |
|
3.9
|
|
3.9
|
|
|
| Other Project Fees |
|
|
|
|
|
|
| Restructuring Reserve [Roll Forward] |
|
|
|
|
|
|
| Balance, beginning of period |
|
|
|
0.4
|
|
|
| Costs recognized |
[1] |
|
|
3.8
|
|
|
| Payments |
|
|
|
(1.6)
|
|
|
| Non-cash charges |
|
|
|
0.0
|
|
|
| Balance, end of period |
|
$ 2.5
|
|
$ 2.5
|
|
|
|
|