CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) [Abstract]
Product sales	$ 372.5	$ 256.8	$ 616.9	$ 507.4
Service revenue	48.6	0	48.6	0
Total net sales	421.1	256.8	665.5	507.4
Cost of goods sold	285.1	198.0	474.2	392.7
Cost of service revenue	33.3	0	33.3	0
Total cost of sales	318.4	198.0	507.5	392.7
Production margin	102.7	58.8	158.0	114.7
Marketing and administrative expenses	46.3	21.6	67.8	44.5
Research and development expenses	6.3	4.8	11.4	9.6
Amortization expense of intangible assets acquired	1.0	0	1.0	0
Acquisition related transaction and integration costs	7.3	0	12.4	0
Restructuring and other charges	6.0	0	6.0	0
Income from operations	35.8	32.4	59.4	60.6
Interest expense, net	(8.9)	(0.1)	(9.1)	(0.3)
Premium on early extinguishment of debt	(5.8)	0	(5.8)	0
Other non-operating income (deductions), net	(0.3)	(1.4)	(0.4)	(1.0)
Total non-operating deductions, net	(15.0)	(1.5)	(15.3)	(1.3)
Income from continuing operations before provision for taxes and equity in earnings	20.8	30.9	44.1	59.3
Provision for taxes on income	3.4	8.2	10.5	16.3
Equity in earnings of affiliates, net of tax	0.2	0	0.2	0
Income from continuing operations, net of tax	17.6	22.7	33.8	43.0
Income (loss) from discontinued operations, net of tax	1.8	(5.0)	1.8	(5.7)
Consolidated net income	19.4	17.7	35.6	37.3
Less: Net income attributable to non-controlling interests	0.9	0.6	1.5	1.4
Net income attributable to Minerals Technologies Inc. (MTI)	$ 18.5	$ 17.1	$ 34.1	$ 35.9
Basic:
Income from continuing operations attributable to MTI (in dollars per share)	$ 0.48	$ 0.63	$ 0.94	$ 1.19
Income (loss) from discontinued operations attributable to MTI (in dollars per share)	$ 0.05	$ (0.14)	$ 0.05	$ (0.16)
Basic earnings per share attributable to MTI (in dollars per share)	$ 0.53	$ 0.49	$ 0.99	$ 1.03
Diluted:
Income from continuing operations attributable to MTI (in dollars per share)	$ 0.48	$ 0.63	$ 0.93	$ 1.18
Income (loss) from discontinued operations attributable to MTI (in dollars per share)	$ 0.05	$ (0.14)	$ 0.05	$ (0.16)
Diluted earnings per share attributable to MTI (in dollars per share)	$ 0.53	$ 0.49	$ 0.98	$ 1.02
Cash dividends declared per common share (in dollars per share)	$ 0.05	$ 0.05	$ 0.10	$ 0.10
Shares used in computation of earnings per share:
Basic (in shares)	34.5	34.8	34.5	34.9
Diluted (in shares)	34.8	35.0	34.7	35.1