Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2020

Stockholders' Equity Note [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The changes in accumulated other comprehensive income (loss) by component for the three and six months ended June 30, 2020 and 2019, were as follows:

($ in millions)	Benefit Plans		Other		Total
Balance as of March 31, 2019	$	(1,264)	$	(5)	$	(1,269)
Amounts reclassified from accumulated other comprehensive loss
Amortization of prior service credit1	(2)		—		(2)
Amortization of net actuarial loss1	26		—		26
Tax expense for items of other comprehensive income	(6)		—		(6)
Net current period other comprehensive income	18		—		18
Balance as of June 30, 2019	$	(1,246)	$	(5)	$	(1,251)
Balance as of March 31, 2020	(1,390)		(4)		(1,394)
Other comprehensive income (loss) before reclassifications	—		1		1
Amounts reclassified from accumulated other comprehensive loss
Amortization of prior service credit1	(3)		—		(3)
Amortization of net actuarial loss1	26		—		26
Tax expense for items of other comprehensive income	(6)		—		(6)
Net current period other comprehensive income	17		1		18
Balance as of June 30, 2020	$	(1,373)	$	(3)	$	(1,376)

($ in millions)	Benefit Plans		Other		Total
Balance as of December 31, 2018	$	(1,283)	$	(5)	$	(1,288)
Amounts reclassified from accumulated other comprehensive loss
Amortization of prior service credit1	(2)		—		(2)
Amortization of net actuarial loss1	51		—		51
Tax expense for items of other comprehensive income	(12)		—		(12)
Net current period other comprehensive income	37		—		37
Balance as of June 30, 2019	$	(1,246)	$	(5)	$	(1,251)
Balance as of December 31, 2019	$	(1,407)	$	(2)	$	(1,409)
Other comprehensive income (loss) before reclassifications	—		(1)		(1)
Amounts reclassified from accumulated other comprehensive loss
Amortization of prior service credit1	(5)		—		(5)
Amortization of net actuarial loss1	51		—		51
Tax expense for items of other comprehensive income	(12)		—		(12)
Net current period other comprehensive income (loss)	34		(1)		33
Balance as of June 30, 2020	$	(1,373)	$	(3)	$	(1,376)

¹ These accumulated comprehensive loss components are included in the computation of net periodic benefit cost. See Note 17: Employee Pension and Other Postretirement Benefits. The tax benefit associated with amounts reclassified from accumulated other comprehensive loss for each of the three months ended June 30, 2020 and 2019, was $6 million. The tax benefit associated with amounts reclassified from accumulated other comprehensive loss for each of the six months ended June 30, 2020 and 2019, was $12 million.