Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2016

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

Accumulated Other Comprehensive Income (Loss)

15. Accumulated Other Comprehensive Income (Loss)

The following summarizes the after-tax changes in the balances of accumulated other comprehensive income (loss):

millions	Interest-rate Derivatives Previously Subject to Hedge Accounting			Pension and Other Postretirement Plans			Total
Balance at December 31, 2015	$	(42	)	$	(341	)	$	(383	)
Other comprehensive income (loss), before reclassifications	—			(105		)	(105		)
Reclassifications to Consolidated Statement of Income	2			(5		)	(3		)
Balance at March 31, 2016	$	(40	)	$	(451	)	$	(491	)