Accumulated Other Comprehensive Income

3 Months Ended

Mar. 31, 2018

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income

Accumulated Other Comprehensive Income

Other comprehensive income refers to revenues, expenses, gains and losses that under generally accepted accounting principles are included in accumulated other comprehensive income, a component of equity within the Consolidated Balance Sheets, rather than net income on the Consolidated Statements of Income. Under existing accounting standards, other comprehensive income may include, among other things, unrecognized gains and losses and prior service credit related to pension and other postretirement benefit plans.

The following tables provide the components of accumulated other comprehensive income / (loss) (AOCI) by component (in millions):

	Pension and Retiree Health and Welfare Benefit Itemsa		Equity Method Investments			Total
Balance at December 31, 2017	$	234	$	(3	)	$	231
Other comprehensive (loss) before reclassifications	—		1			1
Amounts reclassified from AOCI	26		(1		)	25
Balance at March 31, 2018	$	260	$	(3	)	$	257
Balance at December 31, 2016	$	122	$	(3	)	$	119
Other comprehensive (loss) before reclassifications	—		(2		)	(2		)
Amounts reclassified from AOCI	—		—			—
Balance at March 31, 2017	$	122	$	(5	)	$	117

^a Amounts are net of tax.