Derivative Financial Instruments (Schedule Of Notional Amounts Of Outstanding Derivative Positions) (Details) - Mar. 31, 2019 € in Millions, ¥ in Millions, £ in Millions, kr in Millions, RM in Millions, R$ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions	USD ($)	NOK (kr)	BRL (R$)	MYR (RM)	SGD ($)	EUR (€)	CAD ($)	GBP (£)	JPY (¥)	MXN ($)	AUD ($)
Foreign Exchange Forward | Euro | Notional Amount Bought
Derivative
Derivative, notional amount	$ 813.3					€ 724.0
Foreign Exchange Forward | Norwegian krone | Notional Amount Bought
Derivative
Derivative, notional amount	236.8	kr 2,036.5
Foreign Exchange Forward | Brazilian real | Notional Amount Bought
Derivative
Derivative, notional amount	170.8		R$ 665.7
Foreign Exchange Forward | British pound | Notional Amount Bought
Derivative
Derivative, notional amount	139.9							£ 106.8
Foreign Exchange Forward | Australian dollar | Notional Amount Bought
Derivative
Derivative, notional amount	102.4										$ 144.3
Foreign Exchange Forward | Malaysian ringgits | Notional Amount Bought
Derivative
Derivative, notional amount	82.7			RM 337.9
Foreign Exchange Forward | Singapore dollar | Notional Amount Bought
Derivative
Derivative, notional amount	59.4				$ 80.5
Foreign Exchange Forward | Japanese yen | Notional Amount Bought
Derivative
Derivative, notional amount	54.0								¥ 5,986.0
Foreign Exchange Forward | Mexican peso | Notional Amount Sold
Derivative
Derivative, notional amount	16.1									$ 310.0
Foreign Exchange Forward | Canadian dollar | Notional Amount Sold
Derivative
Derivative, notional amount	61.0						$ 81.5
Foreign Exchange Forward | U.S. dollar | Notional Amount Sold
Derivative
Derivative, notional amount	1,790.8
Derivative financial instruments – Embedded Derivatives | Euro | Notional Amount Bought
Derivative
Derivative, notional amount	1.0					€ 0.9
Derivative financial instruments – Embedded Derivatives | Norwegian krone | Notional Amount Sold
Derivative
Derivative, notional amount	1.1	kr 9.1
Derivative financial instruments – Embedded Derivatives | Brazilian real | Notional Amount Sold
Derivative
Derivative, notional amount	8.3		R$ 32.5
Derivative financial instruments – Embedded Derivatives | U.S. dollar | Notional Amount Bought
Derivative
Derivative, notional amount	$ 7.5