Supplemental Cash Flow Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Supplemental Cash Flow Elements [Abstract]
Payments of interest and commitment fees	$ 14.0	$ 2.8
Incurred liabilities for fixed and intangible asset additions	41.6	5.0
Other Asset Additions Incurred but Not yet Paid		$ 0.3