Income Taxes (Tax Loss Carryforwards and Related Tax Assets) (Details) - Capital Loss Carryforward $ in Millions	Dec. 31, 2022 USD ($)
Operating Loss Carryforwards [Line Items]
Tax loss carryforward	$ 5,437.0
Related tax asset	1,327.6
The Netherlands
Operating Loss Carryforwards [Line Items]
Tax loss carryforward	2,593.2
Related tax asset	669.0
Belgium
Operating Loss Carryforwards [Line Items]
Tax loss carryforward	1,099.0
Related tax asset	274.7
U.K.
Operating Loss Carryforwards [Line Items]
Tax loss carryforward	618.0
Related tax asset	154.5
Luxembourg
Operating Loss Carryforwards [Line Items]
Tax loss carryforward	537.3
Related tax asset	146.1
Ireland
Operating Loss Carryforwards [Line Items]
Tax loss carryforward	432.0
Related tax asset	54.3
Other
Operating Loss Carryforwards [Line Items]
Tax loss carryforward	157.5
Related tax asset	$ 29.0