Supplemental Cash Flow Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Supplemental Cash Flow Elements [Abstract]
Payments of interest and commitment fees	$ 46.3	$ 32.5
Incurred liabilities for fixed and intangible asset additions	61.2	22.9
Other Asset Additions Incurred but Not yet Paid	$ 9.8