Sale Of Joint Venture (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 28, 2013 Apex
Cash, including $66.6 of dividends received during 2013 prior to the closing of the sale				$ 758.6
Note receivable	224.0	175.0		38.5
Total fair value of consideration received				797.1
Less book value of investment in unconsolidated joint venture				545.6
Less other related costs and expenses				21.7
Pre-tax gain on sale of unconsolidated joint venture	229.8	0	0	229.8
Income tax expense				86.2
After-tax gain on sale of unconsolidated joint venture				$ 143.6