Notes Payable and Long-Term Debt (Details) € in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2016 EUR (€)	Jul. 20, 2016 USD ($)	Dec. 31, 2015 USD ($)	Mar. 12, 2014 USD ($)
Debt Instrument [Line Items]
Short-term Debt, Weighted Average Interest Rate	2.30%	2.30%		1.30%
Debt, Weighted Average Interest Rate	3.80%	3.80%		3.60%
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt	$ 2,063,000,000			$ 2,269,600,000
Current portion of long-term debt	19,400,000			160,700,000
Long-term debt, net of current portion	2,043,600,000			2,108,900,000
Long-term Debt, by Maturity [Abstract]
2017	175,900,000
2018	17,100,000
2019	136,100,000
2020	252,100,000
2021	2,100,000
After 2021	1,647,400,000
Total payments	2,230,700,000
Less: unamortized discounts	11,200,000
Total	2,219,500,000
Multi-currency revolving credit agreement, maximum borrowing capacity	1,250,000,000
Estimated fair value of senior unsecured notes	2,081,400,000			2,197,600,000
Fair value higher than carrying value for senior unsecured notes	62,000,000			17,700,000
Outstanding letters of credit	32,300,000			29,300,000
Short Term Borrowings [Member]
Short-term debt
Total short-term debt	156,500,000			280,700,000
Senior Notes Due November 2016
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt				152,200,000
Debt instrument par value	$ 150,000,000
Debt instrument stated interest rate	5.75%	5.75%
Debt instrument maturity period	Nov. 01, 2016
Senior Notes Due October 2019
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt	$ 139,100,000			138,500,000
Debt instrument par value	$ 134,000,000
Debt instrument stated interest rate	8.00%	8.00%
Debt instrument maturity period	Oct. 01, 2019
Senior Notes Due September 2020
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt	$ 251,900,000			245,600,000
Debt instrument par value	$ 250,000,000
Debt instrument stated interest rate	4.625%	4.625%
Debt instrument maturity period	Sep. 15, 2020
Senior Notes Due November 2022
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt	$ 520,700,000			536,800,000
Debt instrument par value | €		€ 500
Debt instrument stated interest rate	1.80%	1.80%
Debt instrument maturity period	Nov. 07, 2022
Senior Notes Due March 2025
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt	$ 495,600,000			495,100,000
Debt instrument par value	$ 500,000,000
Debt instrument stated interest rate	3.375%	3.375%
Debt instrument maturity period	Mar. 15, 2025
Senior Notes Due February 2029
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt	$ 118,800,000			118,700,000
Debt instrument par value	$ 121,000,000
Debt instrument stated interest rate	7.125%	7.125%
Debt instrument maturity period	Feb. 15, 2029
Senior Notes Due March 2045
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt	$ 493,300,000			493,000,000
Debt instrument par value	$ 500,000,000
Debt instrument stated interest rate	4.375%	4.375%
Debt instrument maturity period	Mar. 15, 2045
Multi Currency Revolving Credit Facility [Member]
Long-term Debt, by Maturity [Abstract]
Multi-currency revolving credit agreement, maximum borrowing capacity	$ 1,000,000,000
Commercial Paper [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt	50,800,000			215,000,000
Long-term Debt, by Maturity [Abstract]
Multi-currency revolving credit agreement, current borrowing capacity					$ 1,000,000,000.0
Term Loan Facilities And Other [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt	43,600,000			89,700,000
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative, Notional Amount			$ 384,000,000
Interest Rate Swap [Member] | Senior Notes Four [Member]
Long-term Debt, by Maturity [Abstract]
Derivative liabilities				1,900,000
Interest Rate Swap [Member] | Senior Notes Three [Member]
Long-term Debt, by Maturity [Abstract]
Derivative liabilities				800,000
Unamortized portion of debt derivative [Member] | Senior Notes Four [Member]
Long-term Debt, by Maturity [Abstract]
Derivative assets	3,900,000
Unamortized portion of debt derivative [Member] | Senior Notes Three [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt	4,100,000			5,500,000
Long-term Debt, by Maturity [Abstract]
Derivative assets	$ 1,300,000
Unamortized portion of debt derivative [Member] | Senior Notes Two [Member]
Long-term Debt, by Current and Noncurrent [Abstract]
Total long-term debt				$ 2,400,000