Financial Instruments and Risk Management (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 17, 2015	May. 12, 2010
Derivative [Line Items]
Pre-tax net losses on cash flow hedges to be reclassified from AOCE into earnings in next twelve months				$ 36.9
Accretion expense		$ 9.7	$ 9.0	$ 28.5	$ 26.1
Contingent consideration | Minimum
Derivative [Line Items]
Rate used to discount net cash inflows to present value				0.40%
Contingent consideration | Maximum
Derivative [Line Items]
Rate used to discount net cash inflows to present value				9.80%
Cash Flow Hedging | Effective Date November 2016
Derivative [Line Items]
Derivative, notional amount						$ 500.0
Maturity of swaps, in years				10 years
Cash Flow Hedging | Effective Date June 2016
Derivative [Line Items]
Derivative, notional amount						$ 500.0
Maturity of swaps, in years				10 years
Senior Notes | 2020 Senior Notes
Derivative [Line Items]
Stated percentage rate	[1]						7.875%
Designated as Hedging Instrument | Terminated
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred		22.4
Designated as Hedging Instrument | 2020 Senior Notes | Terminated
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred		$ 32.9

[1] Instrument was called by the Company on July 15, 2015 at a redemption price of 103.938% of the principal amount, together with accrued and unpaid interest at the redemption date.