Supplemental Guarantor Information - Condensed Combining Statement of Operations (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 157.0	$ 146.0	$ 465.5	$ 428.8
Costs of goods sold	(117.6)	(110.9)	(354.1)	(324.1)
Gross margin	39.4	35.1	111.4	104.7
Operating expenses:
Selling, general and administrative expense	(18.0)	(16.4)	(52.9)	(50.2)
Total operating expenses	(18.0)	(16.4)	(52.9)	(50.2)
Operating (loss) income	21.4	18.7	58.5	54.5
Other income (expense)
Interest and other (expense) income, net	(11.8)	(12.2)	(37.3)	(40.9)
(Loss) income before income tax and equity in net earnings of unconsolidated subsidiaries	9.6	6.5	21.2	13.6
Income tax benefit (expense)	(1.1)	(3.4)	(8.4)	(10.6)
Net (loss) income before equity in net earnings of unconsolidated subsidiaries	8.5	3.1	12.8	3.0
Net (loss) income	8.5	3.1	12.8	3.0
Less: net income attributable to non-controlling interests	(0.1)	(0.1)	(0.3)	(0.2)
Net (loss) income attributable to controlling stockholders	8.4	3.0	12.5	2.8
Total comprehensive (loss) income	(13.6)	12.6	(8.9)	4.1
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales
Costs of goods sold
Gross margin
Operating expenses:
Selling, general and administrative expense	(1.2)	(1.5)	(3.4)	(4.2)
Total operating expenses	(1.2)	(1.5)	(3.4)	(4.2)
Operating (loss) income	(1.2)	(1.5)	(3.4)	(4.2)
Other income (expense)
Interest and other (expense) income, net	(3.5)	(2.6)	(11.5)	(11.0)
(Loss) income before income tax and equity in net earnings of unconsolidated subsidiaries	(4.7)	(4.1)	(14.9)	(15.2)
Income tax benefit (expense)	0.2	0.6	1.3	1.7
Net (loss) income before equity in net earnings of unconsolidated subsidiaries	(4.5)	(3.5)	(13.6)	(13.5)
Equity in net earnings of unconsolidated subsidiaries	12.9	6.5	26.1	16.3
Net (loss) income	8.4	3.0	12.5	2.8
Less: net income attributable to non-controlling interests
Net (loss) income attributable to controlling stockholders	8.4	3.0	12.5	2.8
Total comprehensive (loss) income	(13.6)	12.5	(8.9)	3.9
Issuers [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales
Costs of goods sold
Gross margin
Operating expenses:
Selling, general and administrative expense	(1.5)	(0.1)	(1.6)	(0.3)
Total operating expenses	(1.5)	(0.1)	(1.6)	(0.3)
Operating (loss) income	(1.5)	(0.1)	(1.6)	(0.3)
Other income (expense)
Interest and other (expense) income, net	(9.9)	(10.5)	(30.5)	(32.6)
(Loss) income before income tax and equity in net earnings of unconsolidated subsidiaries	(11.4)	(10.6)	(32.1)	(32.9)
Income tax benefit (expense)	9.1	2.0	18.5	11.2
Net (loss) income before equity in net earnings of unconsolidated subsidiaries	(2.3)	(8.6)	(13.6)	(21.7)
Equity in net earnings of unconsolidated subsidiaries	15.2	15.1	39.7	38.0
Net (loss) income	12.9	6.5	26.1	16.3
Less: net income attributable to non-controlling interests
Net (loss) income attributable to controlling stockholders	12.9	6.5	26.1	16.3
Total comprehensive (loss) income	(9.2)	16.1	4.3	17.5
Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	28.8	24.2	83.6	76.1
Costs of goods sold	(22.0)	(18.6)	(65.0)	(57.5)
Gross margin	6.8	5.6	18.6	18.6
Operating expenses:
Selling, general and administrative expense	(4.6)	(4.2)	(14.1)	(13.3)
Total operating expenses	(4.6)	(4.2)	(14.1)	(13.3)
Operating (loss) income	2.2	1.4	4.5	5.3
Other income (expense)
Interest and other (expense) income, net	6.5	10.1	20.8	24.8
(Loss) income before income tax and equity in net earnings of unconsolidated subsidiaries	8.7	11.5	25.3	30.1
Income tax benefit (expense)	(4.4)	(3.3)	(15.0)	(13.9)
Net (loss) income before equity in net earnings of unconsolidated subsidiaries	4.3	8.2	10.3	16.2
Equity in net earnings of unconsolidated subsidiaries	10.9	6.9	29.4	21.8
Net (loss) income	15.2	15.1	39.7	38.0
Less: net income attributable to non-controlling interests
Net (loss) income attributable to controlling stockholders	15.2	15.1	39.7	38.0
Total comprehensive (loss) income	(10.1)	26.8	14.0	39.7
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	130.2	123.1	386.9	356.8
Costs of goods sold	(97.6)	(93.6)	(294.1)	(270.7)
Gross margin	32.6	29.5	92.8	86.1
Operating expenses:
Selling, general and administrative expense	(10.7)	(10.6)	(33.8)	(32.4)
Total operating expenses	(10.7)	(10.6)	(33.8)	(32.4)
Operating (loss) income	21.9	18.9	59.0	53.7
Other income (expense)
Interest and other (expense) income, net	(4.9)	(9.2)	(16.1)	(22.1)
(Loss) income before income tax and equity in net earnings of unconsolidated subsidiaries	17.0	9.7	42.9	31.6
Income tax benefit (expense)	(6.0)	(2.7)	(13.2)	(9.6)
Net (loss) income before equity in net earnings of unconsolidated subsidiaries	11.0	7.0	29.7	22.0
Equity in net earnings of unconsolidated subsidiaries
Net (loss) income	11.0	7.0	29.7	22.0
Less: net income attributable to non-controlling interests	(0.1)	(0.1)	(0.3)	(0.2)
Net (loss) income attributable to controlling stockholders	10.9	6.9	29.4	21.8
Total comprehensive (loss) income	(4.9)	18.7	14.2	24.4
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	(2.0)	(1.3)	(5.0)	(4.1)
Costs of goods sold	2.0	1.3	5.0	4.1
Operating expenses:
Total operating expenses
Operating (loss) income
Other income (expense)
Interest and other (expense) income, net
(Loss) income before income tax and equity in net earnings of unconsolidated subsidiaries
Income tax benefit (expense)
Net (loss) income before equity in net earnings of unconsolidated subsidiaries
Equity in net earnings of unconsolidated subsidiaries	(39.0)	(28.5)	(95.2)	(76.1)
Net (loss) income	(39.0)	(28.5)	(95.2)	(76.1)
Less: net income attributable to non-controlling interests
Net (loss) income attributable to controlling stockholders	(39.0)	(28.5)	(95.2)	(76.1)
Total comprehensive (loss) income	$ 24.2	$ (61.5)	$ (32.5)	$ (81.4)

Dynacast International Inc. 10-Q