Equity (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Equity [Abstract]
Treasury sock, shares, acquired	455,219
Treasury stock, value, acquired	$ 78.5
Treasury shares, acquired, tax burden	17,918
Treasury shares, acquired, value, tax burden	$ 3.3
Cash dividends per share (in dollars per share)	$ 0.5	$ 0.32	$ 1.00	$ 0.64
Dividends declared (in dollars per share)	$ 0.5