Financial Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended							3 Months Ended	12 Months Ended						3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2014 Currency Derivatives	Dec. 31, 2013 Currency Derivatives	Sep. 30, 2008 Senior Notes Due In Two Thousand Thirteen And Eighteen [Member]	Mar. 31, 2014 Senior Notes Due In Two Thousand Thirteen And Eighteen [Member] Third Quarter 2008 Interest Rate Locks [Member]	Dec. 31, 2013 Senior Notes Due In Two Thousand Thirteen And Eighteen [Member] Third Quarter 2008 Interest Rate Locks [Member]	Dec. 31, 2013 6.000% Senior Notes Due 2013 [Member]	Mar. 31, 2005 Senior Notes Due In Two Thousand Fifteen [Member]	Mar. 31, 2014 Designated as Hedging Instrument [Member]	Dec. 31, 2013 Designated as Hedging Instrument [Member]	Mar. 31, 2014 Senior Notes Issued in 2013 [Member]	Mar. 31, 2014 Senior Notes Issued in 2013 [Member] Interest Rate Swap [Member]	Dec. 31, 2013 Senior Notes Issued in 2013 [Member] Interest Rate Swap [Member]	Mar. 31, 2014 4.25% Senior notes due 2023 [Member]	Mar. 31, 2014 5.75% Senior notes due 2043 [Member]	Mar. 31, 2014 Senior Notes Due 2023 and 2043 [Member]
Derivative, Notional Amount					$ 625.9	$ 1,510.0
Deferred gain/loss, net of tax, included in accumulated other comprehensive income (AOCI) related to the fair value of the Company's currency derivatives designated as accounting hedges	(202.5)	(607.2)	(166.7)	(521.0)								(0.7)	(3.1)
Currency derivatives expected to be reclassified into earnings over the next twelve months	0.7
Principal amount of notes							1,700.0				300.0			1,550.0	750.0		700.0	500.0	1,200.0
Repayments of Long-term Debt	0.1	0.2								600.0
Deferred (loss) remaining in AOCI related to the interest rate locks								(6.8)	(7.4)						9.9	10.1
Amount expected to be reclassified into interest expense over the next twelve months								$ 2.4							$ 0.7