Derivative Financial Instruments (Schedule Of Notional Amounts Of Outstanding Derivative Positions (Details) - Dec. 31, 2018 € in Millions, ¥ in Millions, £ in Millions, kr in Millions, RM in Millions, R$ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions	USD ($)	EUR (€)	GBP (£)	CAD ($)	BRL (R$)	NOK (kr)	SGD ($)	MYR (RM)	JPY (¥)	AUD ($)
Foreign exchange forward | Australian dollar | Notional amount bought
Derivative [Line Items]
Derivative, notional amount	$ (129.3)									$ (183.2)
Foreign exchange forward | Malaysia, Ringgits | Notional amount bought
Derivative [Line Items]
Derivative, notional amount	(96.1)							RM (397.0)
Foreign exchange forward | Brazilian real | Notional amount bought
Derivative [Line Items]
Derivative, notional amount	(194.2)				R$ (752.3)
Foreign exchange forward | British pound | Notional amount bought
Derivative [Line Items]
Derivative, notional amount	(67.0)		£ (52.4)
Foreign exchange forward | Canadian dollar | Notional amount sold
Derivative [Line Items]
Derivative, notional amount	(181.0)			$ (247.0)
Foreign exchange forward | Euro | Notional amount bought
Derivative [Line Items]
Derivative, notional amount	(831.1)	€ (725.9)
Foreign exchange forward | Norwegian krone | Notional amount bought
Derivative [Line Items]
Derivative, notional amount	(260.6)					kr (2,264.7)
Foreign exchange forward | Singapore dollar | Notional amount bought
Derivative [Line Items]
Derivative, notional amount	(79.4)						$ (108.2)
Foreign exchange forward | Japan, Yen | Notional amount bought
Derivative [Line Items]
Derivative, notional amount	(73.9)								¥ (8,118.0)
Foreign exchange forward | U.S. dollar | Notional amount sold
Derivative [Line Items]
Derivative, notional amount	(1,051.8)
Embedded derivative financial instruments | Norwegian krone | Notional amount sold
Derivative [Line Items]
Derivative, notional amount	(12.0)					kr (104.3)
Embedded derivative financial instruments | U.S. dollar | Notional amount bought
Derivative [Line Items]
Derivative, notional amount	$ (13.1)