Principles Of Consolidation (Fair Value Measurement) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted amounts held in escrow-current	$ 28.9	$ 90.1
Restricted amounts held in escrow-long term	60.2	0.6
Total assets at fair value	89.1	90.7
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted amounts held in escrow-current	28.9	90.1
Restricted amounts held in escrow-long term	60.2	0.6
Total assets at fair value	89.1	90.7
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted amounts held in escrow-current	0	0
Restricted amounts held in escrow-long term	0	0
Total assets at fair value	0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted amounts held in escrow-current	0	0
Restricted amounts held in escrow-long term	0	0
Total assets at fair value	$ 0	$ 0