Equity And Accumulated Other Comprehensive Income (Loss), Net (Equity Distribution Agreements Narrative) (Details) (2011 Equity Distribution Agreements [Member], USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Jun. 29, 2011
2011 Equity Distribution Agreements [Member]
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Aggregate offering price of the distribution agreement maximum		$ 400.0
Net proceeds from sale of common stock	342.7
Issuance of common shares	5.7
Equity distribution agreements at an average price	$ 60.35
Payment of commissions to sales agents	3.5
Aggregate offering price remaining available for offer and sale	$ 53.8