Financing Arrangements and Debt (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Jun. 30, 2013	Mar. 31, 2015
Line of Credit Facility [Line Items]
Capital lease duration	25 years
Capital lease payment duration	15 years
Capital lease obligations, current		$ 21.8
Capital lease obligations, noncurrent		209.2
Committed Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity		2,000
Credit facility, maturity date		Jun. 01, 2017
Credit facility interest rate above LIBOR		1.25%
Line of credit facility fee		0.25%
Uncommitted Credit Facilities [Member]
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity		$ 290