Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended						3 Months Ended
	Dec. 31, 2002	Mar. 31, 2014	Dec. 31, 2013	Jul. 20, 2007	Mar. 31, 2014 2003 to 2006 Tax Years [Member]	Mar. 31, 2014 2002 to 2006 Tax Years [Member]	Mar. 31, 2013 Tax Year 2002 [Member]
Withholding Tax Percentage Proposed				30.00%
IRS Assertion Of Additional Taxes Due				$ 84.0	$ 665.0	$ 210.0
IRS Assertion of Additional Withholding Tax Due				25.0	455.0
Interest Paid	85.0
Income Tax Examination, Estimate of Possible Loss							109.0
Penalty Percentage On Asserted Underpayment Of Income Tax On Dividends						20.00%
Unrecognized Tax Benefits		$ 352.0	$ 363.3