Related Party Transactions (Details) (TDK Recording Media business, USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
TDK Recording Media business
Related Party Transaction [Line Items]
Ownership percentage by related party	18.00%
Purchases from related party	$ 3,000,000	$ 28,000,000	$ 38,000,000
Trade payable to related party	0	1,600,000
Trade receivables from related party	$ 0	$ 0