Derivative Instruments | Net Investment Hedge Notional Amounts (Details) $ in Millions	Jan. 31, 2020 USD ($)
Maturity Year One [Member]
Schedule of Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Notional Amount	$ 21.6
Maturity Year Two [Member]
Schedule of Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Notional Amount	21.6
Maturity Year Three [Member]
Schedule of Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Notional Amount	267.0
Maturity Year Four [Member]
Schedule of Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Notional Amount	12.4
Maturity Year Five [Member]
Schedule of Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Notional Amount	12.4
Maturity After Year Five [Member]
Schedule of Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Notional Amount	281.0
Net Investment Hedging [Member]
Schedule of Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Notional Amount	$ 616.0