Financial Instruments - Derivatives (Details) € in Millions, ¥ in Millions, ¥ in Millions, £ in Millions, kr in Millions, $ in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) t	Mar. 31, 2018 JPY (¥)	Mar. 31, 2018 CNY (¥)	Mar. 31, 2018 SEK (kr)	Mar. 31, 2018 EUR (€)	Mar. 31, 2018 MXN ($)	Mar. 31, 2018 GBP (£)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 JPY (¥)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2017 SEK (kr)	Dec. 31, 2017 EUR (€)	Dec. 31, 2017 MXN ($)	Dec. 31, 2017 GBP (£)	Jul. 20, 2016 USD ($)
Commodity contracts | Maturity December 2018
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | t	227.0
Interest rate swaps
Derivative [Line Items]
Notional amount of currency derivatives | $															$ 384.0
Brazil, Brazil Real | Foreign currency | Maturity December 2018
Derivative [Line Items]
Notional amount of currency derivatives | €					€ 2.7							€ 1.1
United Kingdom, Pounds | Foreign currency | Maturity December 2018
Derivative [Line Items]
Notional amount of currency derivatives	$ 8.6				30.1			$ 0.0				0.0
China, Yuan Renminbi | Foreign currency | Maturity September 2018
Derivative [Line Items]
Notional amount of currency derivatives | $	24.4							36.0
China, Yuan Renminbi | Foreign currency | Maturity June 2018
Derivative [Line Items]
Notional amount of currency derivatives | €					8.2							18.6
Euro Member Countries, Euro | Cross Currency Interest Rate Contract [Member] | Maturity September 2020
Derivative [Line Items]
Notional amount of currency derivatives | €					206.2
Euro Member Countries, Euro | Foreign currency | Maturity December 2018
Derivative [Line Items]
Notional amount of currency derivatives		¥ 857.8	¥ 59.7				£ 3.0		¥ 1,311.3	¥ 85.0				£ 3.9
Euro Member Countries, Euro | Foreign currency | Maturity May 2018
Derivative [Line Items]
Notional amount of currency derivatives | kr				kr 267.4							kr 267.4
Euro Member Countries, Euro | Foreign currency | Maturity March 2019
Derivative [Line Items]
Notional amount of currency derivatives | $	37.5							56.5
Japan, Yen | Foreign currency | Maturity December 2018
Derivative [Line Items]
Notional amount of currency derivatives	2.0		¥ 62.2					0.0		¥ 0.0
Korea (South), Won | Foreign currency | Maturity December 2018
Derivative [Line Items]
Notional amount of currency derivatives	8.1	¥ 518.5			2.8			$ 11.2	¥ 619.0			3.1
Sweden, Kronor | Foreign currency | Maturity January 2020
Derivative [Line Items]
Notional amount of currency derivatives | €					97.3							109.7
United States of America, Dollars | Cross Currency Interest Rate Contract [Member] | Maturity September 2020
Derivative [Line Items]
Notional amount of currency derivatives | $	$ 250.0
United States of America, Dollars | Foreign currency | Maturity December 2018
Derivative [Line Items]
Notional amount of currency derivatives					€ 42.0	$ 404.3						€ 42.0	$ 0.0