Fair Value Measurements and Risk - Narrative (Details) € in Millions, lb in Millions	6 Months Ended
	Jun. 30, 2016 EUR (€) Currency country lb	Jun. 30, 2016 USD ($) Currency country	Feb. 03, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of countries in which entity operates | country	40	40
Number of currencies used | Currency	30	30
Fixed interest rate (percent)			2.393%
Term Loan B (EUR)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Term loan principal designated as hedging instrument | €	€ 80.1
Fixed-rate natural gas swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maximum period of cash flow hedging	15 months
Fixed-rate aluminum swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maximum period of cash flow hedging	15 months
Commodity contracts notional amount | lb	1.3
Total contract value | $		$ 900,000
Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total contract value | $			$ 250,000,000
Currency Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cross-currency swaps | €	€ 170.0