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Summary of Significant Accounting Policies (Foreign Currency Exchange) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Significant Transactions
Net unrealized foreign currency translation (losses) gains	(79.8)	88.4
SEK
Significant Transactions
Foreign currency exchange rate	7.7737	6.4339	6.4973
GBP
Significant Transactions
Foreign currency exchange rate	0.6426	0.6044	0.6154
Canada, Dollars
Significant Transactions
Foreign currency exchange rate	0.8245	0.7259	0.7564

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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