Long-Term Debt (Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified																	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 6.75% Senior Notes Due 2018 [Member]	Dec. 31, 2013 6.75% Senior Notes Due 2018 [Member]	Jun. 30, 2014 5.5% Senior Notes Due 2020 [Member]	Dec. 31, 2013 5.5% Senior Notes Due 2020 [Member]	Jun. 30, 2014 Term Loan Facility Due 2016 [Member]	Dec. 31, 2013 Term Loan Facility Due 2016 [Member]	Jun. 30, 2014 Revolving Credit Facility Due 2016 [Member]	Dec. 31, 2013 Revolving Credit Facility Due 2016 [Member]	Jun. 30, 2014 Mortgage Facility [Member]		Dec. 31, 2013 Mortgage Facility [Member]		Jun. 30, 2014 Capital Leases and Other Debt [Member]	Dec. 31, 2013 Capital Leases and Other Debt [Member]	Jun. 30, 2014 Secured Debt [Member] Mortgage Facility [Member]
Senior Notes			$ 396.7	$ 396.3	$ 350.0	$ 350.0
Term loan facility							500.0	500.0
Revolving credit facility									365.0	300.0
Mortgage facility											190.1	[1]	194.7	[1]
Capital leases and other debt															81.4	98.9
Long-term debt	1,883.2	1,839.9
Less: current maturities	(17.5)	(30.1)
Long-term debt, net of current maturities	1,865.7	1,809.8
Monthly principal and interest payments on mortgage facility																	1.7
Balloon payment for mortgage																	$ 155.4

[1] The mortgage facility requires monthly principal and interest payments of $1.7 million based on a fixed amortization schedule with a balloon payment of $155.4 million due November 2017.