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Derivatives (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jan. 26, 2016
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ 10.0	$ 14.9	$ 4.6
Non-hedge derivatives immaterial	not material	not material	not material
Intercompany Foreign Currency Derivatives, Cash (Paid) Received At Settlement	$ 1.9	$ 3.1	$ (1.6)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 7.4
Cash flow hedge ineffectiveness	not material
Interest Rate Swap [Member]
Debt Instrument, Face Amount	$ 596.0
Derivative, Notional Amount	596.0
Cross Currency Interest Rate Swap [Member]
Derivative, Notional Amount	189.1
Forward Starting Interest Rate Swaps [Member]
Derivative Liability, Notional Amount	1,000.0	$ 400.0		$ 1,300.0
Unrealized Loss on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	$ 3.1
Total 2015 and 2016 Forward Starting Interest Rate Swaps [Member]
Derivative Liability, Notional Amount				$ 2,300.0
Minimum [Member] | Interest Rate Swap [Member]
Derivative, Term of Contract	5 years
Maximum [Member] | Interest Rate Swap [Member]
Derivative, Term of Contract	10 years
Maximum [Member] | Cross Currency Interest Rate Contract [Member]
Derivative, Term of Contract	3 years
Maximum [Member] | Foreign Exchange Forward [Member]
Derivative, Term of Contract	18 months
4.70% senior notes due 2020 [Member]
Debt Instrument, Interest Rate, Stated Percentage		4.70%
Debt Instrument, Face Amount		$ 550.0
Debt Instrument, Maturity Date		Aug. 15, 2020
4.70% senior notes due 2020 [Member] | Interest Rate Swap [Member]
Repayments of Debt		$ 154.0
Cash paid, interest rate swap		5.9
Debt Instrument, Face Amount		$ 346.0
6.25% senior notes due 2018 [Member]
Debt Instrument, Interest Rate, Stated Percentage		6.25%
Debt Instrument, Face Amount		$ 250.0
Cash received, interest rate swap		$ 18.7
Debt Instrument, Maturity Date		Apr. 15, 2018
4.00% Senior Notes Due 2024 [Member]
Debt Instrument, Interest Rate, Stated Percentage		4.00%
Debt Instrument, Face Amount	$ 500.0
Debt Instrument, Maturity Date	Dec. 01, 2024	Dec. 01, 2024
4.00% Senior Notes Due 2024 [Member] | Interest Rate Swap [Member]
Debt Instrument, Face Amount		$ 250.0
Forward Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ (3.1)	$ 0.0	$ 0.0
UNITED STATES | Foreign Exchange Contract [Member]
Derivative, Notional Amount	185.2
Total International [Member] | Foreign Exchange Contract [Member]
Derivative, Notional Amount	$ 82.6

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Intercompany Foreign Currency Derivatives, Cash Received or Paid At Settlement

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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Nominal or face amount used to calculate payments on the derivative liability.

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