Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2013

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Tabular disclosure of pre-tax, tax, and after-tax components of other comprehensive income (loss)

The following tables present the pre-tax, tax, and after-tax components of Grace's other comprehensive income (loss) for the years ended December 31, 2013, 2012, and 2011:

Year Ended December 31, 2013 (In millions)	Pre-Tax Amount			Tax Benefit/ (Expense)			After-Tax Amount
Defined benefit pension and other postretirement plans:
Amortization of net prior service cost included in net periodic benefit cost	$	0.7		$	(0.2	)	$	0.5
Amortization of net deferred actuarial loss included in net periodic benefit cost	0.4			(0.1		)	0.3
Net prior service credit arising during period	1.7			(0.6		)	1.1
Net deferred actuarial gain arising during period	4.3			(1.6		)	2.7
Benefit plans, net	7.1			(2.5		)	4.6
Currency translation adjustments	(23.6		)	—			(23.6		)
Loss from hedging activities	(0.3		)	0.1			(0.2		)
Gain on securities available for sale	0.1			—			0.1
Other comprehensive loss attributable to W. R. Grace & Co. shareholders	$	(16.7	)	$	(2.4	)	$	(19.1	)

Year Ended December 31, 2012 (In millions)	Pre-Tax Amount		Tax Benefit/ (Expense)			After-Tax Amount
Defined benefit pension and other postretirement plans:
Amortization of net prior service cost included in net periodic benefit cost	$	0.8	$	(0.3	)	$	0.5
Amortization of net deferred actuarial loss included in net periodic benefit cost	0.6		(0.2		)	0.4
Net deferred actuarial gain arising during period	2.1		(0.7		)	1.4
Benefit plans, net	3.5		(1.2		)	2.3
Currency translation adjustments	5.5		—			5.5
Gain from hedging activities	3.7		(1.3		)	2.4
Other comprehensive income attributable to W. R. Grace & Co. shareholders	$	12.7	$	(2.5	)	$	10.2

Year Ended December 31, 2011 (In millions)	Pre-Tax Amount			Tax Benefit/ (Expense)			After-Tax Amount
Defined benefit pension and other postretirement plans:
Amortization of net prior service cost included in net periodic benefit cost	$	1.1		$	(0.4	)	$	0.7
Amortization of net deferred actuarial loss included in net periodic benefit cost	0.6			(0.2		)	0.4
Net prior service credit arising during period	0.4			(0.1		)	0.3
Net deferred actuarial gain arising during period	7.3			(2.5		)	4.8
Benefit plans, net	9.4			(3.2		)	6.2
Currency translation adjustments	(11.3		)	—			(11.3		)
Loss from hedging activities	(3.2		)	1.1			(2.1		)
Other comprehensive loss attributable to W. R. Grace & Co. shareholders	$	(5.1	)	$	(2.1	)	$	(7.2	)

Schedule of components of accumulated other comprehensive loss

The following tables present the changes in accumulated other comprehensive income, net of tax, for the years ended December 31, 2013, 2012, and 2011:

Year Ended December 31, 2013 (In millions)	Defined Benefit Pension and Other Postretirement Plans		Currency Translation Adjustments			Gains and Losses from Hedging Activities			Unrealized Loss on Investment			Gain on Securities Available for Sale		Total
Beginning balance	$	2.0	$	28.8		$	(0.3	)	$	(0.8	)	$	—	$	29.7
Other comprehensive income (loss) before reclassifications	3.8		(23.6		)	1.2			—			0.1		(18.5		)
Amounts reclassified from accumulated other comprehensive income	0.8		—			(1.4		)	—			—		(0.6		)
Net current-period other comprehensive income (loss)	4.6		(23.6		)	(0.2		)	—			0.1		(19.1		)
Ending balance	$	6.6	$	5.2		$	(0.5	)	$	(0.8	)	$	0.1	$	10.6

Year Ended December 31, 2012 (In millions)	Defined Benefit Pension and Other Postretirement Plans			Currency Translation Adjustments		Gains and Losses from Hedging Activities			Unrealized Loss on Investment			Total
Beginning balance	$	(0.3	)	$	23.3	$	(2.7	)	$	(0.8	)	$	19.5
Other comprehensive income (loss) before reclassifications	1.4			5.5		(0.3		)	—			6.6
Amounts reclassified from accumulated other comprehensive income	0.9			—		2.7			—			3.6
Net current-period other comprehensive income	2.3			5.5		2.4			—			10.2
Ending balance	$	2.0		$	28.8	$	(0.3	)	$	(0.8	)	$	29.7

Year Ended December 31, 2011 (In millions)	Defined Benefit Pension and Other Postretirement Plans			Currency Translation Adjustments			Gains and Losses from Hedging Activities			Unrealized Loss on Investment			Total
Beginning balance	$	(6.5	)	$	34.6		$	(0.6	)	$	(0.8	)	$	26.7
Other comprehensive income (loss) before reclassifications	5.1			(11.3		)	(3.9		)	—			(10.1		)
Amounts reclassified from accumulated other comprehensive income	1.1			—			1.8			—			2.9
Net current-period other comprehensive income (loss)	6.2			(11.3		)	(2.1		)	—			(7.2		)
Ending balance	$	(0.3	)	$	23.3		$	(2.7	)	$	(0.8	)	$	19.5