Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2018

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

Schedule Of Accumulated Other Comprehensive Income Loss

The changes in accumulated other comprehensive income (loss) (AOCI) by component, net of tax, for the three month period ended June 30, 2018 were as follows (in millions):

	Post- retirement benefit plans			Currency translation adjustment			Unrealized holding gains on securities		Derivatives			Deferred Tax Asset Valuation Allowance			Total
Attributable to ATI:
Balance, March 31, 2018	$	(940.2	)	$	(36.8	)	$	—	$	9.2		$	(24.4	)	$	(992.2	)
OCI before reclassifications		—			(23.1	)		—		7.5			—		(15.6		)
Amounts reclassified from AOCI	(a)	14.0		(b)	—		(b)	—	(c)	(3.5	)	(d)	5.7		16.2
Net current-period OCI		14.0			(23.1	)		—		4.0			5.7		0.6
Balance, June 30, 2018	$	(926.2	)	$	(59.9	)	$	—	$	13.2		$	(18.7	)	$	(991.6	)
Attributable to noncontrolling interests:
Balance, March 31, 2018	$	—		$	24.2		$	—	$	—		$	—		$	24.2
OCI before reclassifications		—			(3.1	)		—		—			—		(3.1		)
Amounts reclassified from AOCI		—		(b)	—			—		—			—		—
Net current-period OCI		—			(3.1	)		—		—			—		(3.1		)
Balance, June 30, 2018	$	—		$	21.1		$	—	$	—		$	—		$	21.1

The changes in AOCI by component, net of tax, for the six month period ended June 30, 2018 were as follows (in millions):

	Post- retirement benefit plans			Currency translation adjustment			Unrealized holding gains on securities		Derivatives			Deferred Tax Asset Valuation Allowance			Total
Attributable to ATI:
Balance, December 31, 2017	$	(954.5	)	$	(53.5	)	$	—	$	9.0		$	(28.8	)	$	(1,027.8	)
OCI before reclassifications		—			(6.4	)		—		10.0			—		3.6
Amounts reclassified from AOCI	(a)	28.3		(b)	—		(b)	—	(c)	(5.8	)	(d)	10.1		32.6
Net current-period OCI		28.3			(6.4	)		—		4.2			10.1		36.2
Balance, June 30, 2018	$	(926.2	)	$	(59.9	)	$	—	$	13.2		$	(18.7	)	$	(991.6	)
Attributable to noncontrolling interests:
Balance, December 31, 2017	$	—		$	17.3		$	—	$	—		$	—		$	17.3
OCI before reclassifications		—			3.8			—		—			—		3.8
Amounts reclassified from AOCI		—		(b)	—			—		—			—		—
Net current-period OCI		—			3.8			—		—			—		3.8
Balance, June 30, 2018	$	—		$	21.1		$	—	$	—		$	—		$	21.1

(a) Amounts were included in net periodic benefit cost for pension and other postretirement benefit plans (see Note 9).

(b) No amounts were reclassified to earnings.

(c) Amounts related to derivatives are included in cost of goods sold in the period or periods the hedged item affects earnings (see Note 7).

(d) Represents the net change in deferred tax asset valuation allowances on changes in AOCI balances between the balance sheet dates.

The changes in AOCI by component, net of tax, for the three month period ended June 30, 2017 were as follows (in millions):

	Post- retirement benefit plans			Currency translation adjustment			Unrealized holding gains on securities		Derivatives			Deferred Tax Asset Valuation Allowance			Total
Attributable to ATI:
Balance, March 31, 2017	$	(954.7	)	$	(76.6	)	$	—	$	0.3		$	(40.4	)	$	(1,071.4	)
OCI before reclassifications		—			4.2			—		(5.2	)		1.1		0.1
Amounts reclassified from AOCI	(a)	11.2		(b)	—		(b)	—	(c)	(0.8	)		(6.3	)	4.1
Net current-period OCI		11.2			4.2			—		(6.0	)		(5.2	)	4.2
Balance, June 30, 2017	$	(943.5	)	$	(72.4	)	$	—	$	(5.7	)	$	(45.6	)	$	(1,067.2	)
Attributable to noncontrolling interests:
Balance, March 31, 2017	$	—		$	11.7		$	—	$	—		$	—		$	11.7
OCI before reclassifications		—			0.2			—		—			—		0.2
Amounts reclassified from AOCI		—		(b)	—			—		—			—		—
Net current-period OCI		—			0.2			—		—			—		$	0.2
Balance, June 30, 2017	$	—		$	11.9		$	—	$	—		$	—		$	11.9

The changes in AOCI by component, net of tax, for the six month period ended June 30, 2017 were as follows (in millions):

	Post- retirement benefit plans			Currency translation adjustment			Unrealized holding gains on securities		Derivatives			Deferred Tax Asset Valuation Allowance			Total
Attributable to ATI:
Balance, December 31, 2016	$	(965.5	)	$	(85.0	)	$	—	$	2.4		$	(45.6	)	$	(1,093.7	)
OCI before reclassifications		—			12.6			—		(6.7	)		—		5.9
Amounts reclassified from AOCI	(a)	22.0		(b)	—		(b)	—	(c)	(1.4	)		—		20.6
Net current-period OCI		22.0			12.6			—		(8.1	)		—		26.5
Balance, June 30, 2017	$	(943.5	)	$	(72.4	)	$	—	$	(5.7	)	$	(45.6	)	$	(1,067.2	)
Attributable to noncontrolling interests:
Balance, December 31, 2016	$	—		$	9.7		$	—	$	—		$	—		$	9.7
OCI before reclassifications		—			2.2			—		—			—		2.2
Amounts reclassified from AOCI		—		(b)	—			—		—			—		—
Net current-period OCI		—			2.2			—		—			—		$	2.2
Balance, June 30, 2017	$	—		$	11.9		$	—	$	—		$	—		$	11.9

(a) Amounts were included in net periodic benefit cost for pension and other postretirement benefit plans (see Note 9).

(b) No amounts were reclassified to earnings.

(c) Amounts related to the effective portion of the derivatives are included in cost of goods sold in the period or periods the hedged item affects earnings (see Note 7).

Reclassification out of Accumulated Other Comprehensive Income

Reclassifications out of AOCI for the three and six month periods ended June 30, 2018 and 2017 were as follows:

	Amount reclassified from AOCI
Details about AOCI Components (In millions)	Three months ended June 30, 2018			Three months ended June 30, 2017			Six months ended June 30, 2018			Six months ended June 30, 2017				Affected line item in the statements of income
Postretirement benefit plans
Prior service (cost) credit	$	0.6		$	0.4		$	1.2		$	0.8		(a)
Actuarial losses	(19.1		)	(18.0		)	(38.3		)	(35.8		)	(a)
	(18.5		)	(17.6		)	(37.1		)	(35.0		)	(c)	Total before tax
	(4.5		)	(6.4		)	(8.8		)	(13.0		)		Tax provision (benefit) (d)
	$	(14.0	)	$	(11.2	)	$	(28.3	)	$	(22.0	)		Net of tax
Derivatives
Nickel and other raw material contracts	$	4.5		$	(1.6	)	$	8.2		$	(2.5	)	(b)
Natural gas contracts	(0.1		)	(1.1		)	(0.5		)	(3.4		)	(b)
Foreign exchange contracts	0.3			4.1			—			8.2			(b)
	4.7			1.4			7.7			2.3			(c)	Total before tax
	1.2			0.6			1.9			0.9				Tax provision (benefit) (d)
	$	3.5		$	0.8		$	5.8		$	1.4			Net of tax

(a) Amounts are reported in nonoperating retirement benefit expense (see Note 9).

(b) Amounts related to derivatives are included in cost of goods sold in the period or periods the hedged item affects earnings (see Note 7).

(c) For pretax items, positive amounts are income and negative amounts are expense in terms of the impact to net income. Tax effects are presented in conformity with ATI’s presentation in the consolidated statements of income.

(d) These amounts exclude the impact of any deferred tax asset valuation allowance, when applicable.