Equity (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Equity [Abstract]
Treasury sock, shares, acquired	254,340
Treasury stock, value, acquired	$ 46.8
Treasury shares, acquired, tax burden	7,476
Treasury shares, acquired, value, tax burden	$ 1.4
Cash dividends per share (in dollars per share)	$ 0.5	$ 0.32
Dividends declared (in dollars per share)	$ 0.5