Acquisitions Acquired Intangibles, Amortization Expense Next Five Years (Details) $ in Millions	Feb. 28, 2020 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense, 2019	$ 12.0
Amortization expense, 2020	11.7
Amortization expense, 2021	11.6
Amortization expense, 2022	11.1
Amortization expense, 2023	11.3
Amortization Expense, 2019-2023 Total	57.7
Orangebox Acquisition Q3 2019 [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense, 2019	4.1
Amortization expense, 2020	4.1
Amortization expense, 2021	4.1
Amortization expense, 2022	4.1
Amortization expense, 2023	4.2
Amortization Expense, 2019-2023 Total	20.6
Smith System Q2 FY19 [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense, 2019	4.4
Amortization expense, 2020	4.2
Amortization expense, 2021	4.2
Amortization expense, 2022	4.2
Amortization expense, 2023	4.3
Amortization Expense, 2019-2023 Total	21.3
AMQ Acquisition Q4 2018 [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense, 2019	3.0
Amortization expense, 2020	3.0
Amortization expense, 2021	3.0
Amortization expense, 2022	2.5
Amortization expense, 2023	2.5
Amortization Expense, 2019-2023 Total	$ 14.0