Cash Flow Information (Reconciliation Of Capital Additions To Cash Paid For Capital Expenditures) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash Flow Information [Abstract]
Capital additions	$ 353.4	$ 91.0
Cash paid for capital expenditures	241.1	65.7
Difference	112.3	25.3
Non-cash accruals	59.5	25.3
Capital leases	52.8
Total	$ 112.3	$ 25.3