Fair Value Disclosures (Recurring Fair Value Measurements) (Details) - USD ($) $ in Millions		Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		$ 25.5	$ 16.4
Derivative Asset, Fair Value, Gross Asset		17.6	9.5
Financial and Nonfinancial Liabilities, Fair Value Disclosure		14.4	13.5
Derivative Liability, Fair Value, Gross Liability		14.4	13.5
Cash and cash equivalents		8,180.9	274.8	$ 215.4	$ 199.4
Other assets		293.4	273.4
Investment Securities, Including Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[1]	7.9	6.9
Forward Starting Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure			0.1
Cross Currency Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure			0.6
Financial and Nonfinancial Liabilities, Fair Value Disclosure		12.8
Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		16.2	2.2
Financial and Nonfinancial Liabilities, Fair Value Disclosure			5.3
Foreign Currency Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		1.4	6.6
Financial and Nonfinancial Liabilities, Fair Value Disclosure		1.6	1.7
Cash and Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		2.9	2.0
Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets		5.0	4.9
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		4.6	4.5
Financial and Nonfinancial Liabilities, Fair Value Disclosure		0.0	0.0
Fair Value, Inputs, Level 1 [Member] | Investment Securities, Including Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[1]	4.6	4.5
Fair Value, Inputs, Level 1 [Member] | Forward Starting Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure			0.0
Fair Value, Inputs, Level 1 [Member] | Cross Currency Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure			0.0
Financial and Nonfinancial Liabilities, Fair Value Disclosure		0.0
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		0.0	0.0
Financial and Nonfinancial Liabilities, Fair Value Disclosure			0.0
Fair Value, Inputs, Level 1 [Member] | Foreign Currency Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		0.0	0.0
Financial and Nonfinancial Liabilities, Fair Value Disclosure		0.0	0.0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		20.9	11.9
Financial and Nonfinancial Liabilities, Fair Value Disclosure		14.4	13.5
Fair Value, Inputs, Level 2 [Member] | Investment Securities, Including Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[1]	3.3	2.4
Fair Value, Inputs, Level 2 [Member] | Cross Currency Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure			0.6
Financial and Nonfinancial Liabilities, Fair Value Disclosure		12.8
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		16.2	2.2
Financial and Nonfinancial Liabilities, Fair Value Disclosure			5.3
Fair Value, Inputs, Level 2 [Member] | Foreign Currency Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		1.4	6.6
Financial and Nonfinancial Liabilities, Fair Value Disclosure		1.6	1.7
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		0.0	0.0
Financial and Nonfinancial Liabilities, Fair Value Disclosure		0.0	0.0
Fair Value, Inputs, Level 3 [Member] | Investment Securities, Including Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		0.0	0.0
Fair Value, Inputs, Level 3 [Member] | Forward Starting Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure			0.0
Fair Value, Inputs, Level 3 [Member] | Cross Currency Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure			0.0
Financial and Nonfinancial Liabilities, Fair Value Disclosure		0.0
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		0.0	0.0
Financial and Nonfinancial Liabilities, Fair Value Disclosure			0.0
Fair Value, Inputs, Level 3 [Member] | Foreign Currency Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		0.0	0.0
Financial and Nonfinancial Liabilities, Fair Value Disclosure		0.0	0.0
Prepaid Expenses And Other [Member] | Fair Value, Inputs, Level 2 [Member] | Forward Starting Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset			0.1
Other Noncurrent Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability		0.0	5.3
Other Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset		16.2	2.2
Cross Currency Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure			3.3
Cross Currency Interest Rate Contract [Member] | Other Noncurrent Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability		12.8	3.3
Cross Currency Interest Rate Contract [Member] | Other Noncurrent Liabilities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure			0.0
Cross Currency Interest Rate Contract [Member] | Other Noncurrent Liabilities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure			3.3
Cross Currency Interest Rate Contract [Member] | Other Noncurrent Liabilities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure			0.0
Cross Currency Interest Rate Contract [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset		0.0	0.6
Forward Starting Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability			3.2
Forward Starting Interest Rate Swaps [Member] | Other Noncurrent Liabilities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability			0.0
Forward Starting Interest Rate Swaps [Member] | Other Noncurrent Liabilities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability			0.0
Forward Starting Interest Rate Swaps [Member] | Other Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset		0.0	0.1
Forward Starting Interest Rate Swaps [Member] | Accrued Liabilities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability		$ 0.0	$ 3.2

[1] The values of investment securities, including mutual funds, are classified as cash and cash equivalents ($2.9 million and $2.0 million as of March 31, 2016 and December 31, 2015, respectively) and other assets ($5.0 million and $4.9 million as of March 31, 2016 and December 31, 2015, respectively).