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Financial Instruments (Contractual Maturities) (Details) $ in Millions	Mar. 31, 2019 USD ($)
Debt Securities Contractual Maturities
Total	$ 935.7
Less Than 1 Year	99.3
1-5 Years	539.9
6-10 Years	121.3
More Than 10 Years	$ 175.2

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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