The following table summarizes changes to accumulated OCI for the three and nine months ended September 30, 2016 and 2015 (in millions):



Accumulated Other Comprehensive Income (Loss)	Net Unrealized Gain (Loss) on Available-for-Sale MBS			Net Unrealized Gain (Loss) on Swaps			Total Accumulated OCI Balance
Three Months Ended September 30, 2016
Balance as of June 30, 2016	$	1,108		$	(8	)	$	1,100
OCI before reclassifications	(36		)	—			(36		)
Amounts reclassified from accumulated OCI	(61		)	7			(54		)
Balance as of September 30, 2016	$	1,011		$	(1	)	$	1,010

Three Months Ended September 30, 2015
Balance as of June 30, 2015	$	89		$	(85	)	$	4
OCI before reclassifications	428			—			428
Amounts reclassified from accumulated OCI	39			24			63
Balance as of September 30, 2015	$	556		$	(61	)	$	495

Nine Months Ended September 30, 2016
Balance as of December 31, 2015	$	(27	)	$	(39	)	$	(66	)
OCI before reclassifications	1,152			—			1,152
Amounts reclassified from accumulated OCI	(114		)	38			(76		)
Balance as of September 30, 2016	$	1,011		$	(1	)	$	1,010

Nine Months Ended September 30, 2015
Balance as of December 31, 2014	$	570		$	(140	)	$	430
OCI before reclassifications	(39		)	—			(39		)
Amounts reclassified from accumulated OCI	25			79			104
Balance as of September 30, 2015	$	556		$	(61	)	$	495

The following table summarizes reclassifications out of accumulated OCI for the three and nine months ended September 30, 2016 and 2015 (in millions):



	Three Months Ended September 30,					Line Item in the Consolidated Statements of Comprehensive Income Where Net Income is Presented
Amounts Reclassified from Accumulated OCI	2016			2015
(Gain) loss amounts reclassified from accumulated OCI for available-for-sale MBS upon realization	$	(61	)	$	39	Gain (loss) on sale of mortgage-backed securities, net
Periodic interest costs of interest rate swaps previously designated as hedges under GAAP, net	7			24		Interest expense
Total reclassifications	$	(54	)	$	63



	Nine Months Ended September 30,					Line Item in the Consolidated Statements of Comprehensive Income Where Net Income is Presented
Amounts Reclassified from Accumulated OCI	2016			2015
(Gain) loss amounts reclassified from accumulated OCI for available-for-sale MBS upon realization	$	(114	)	$	25	Gain (loss) on sale of mortgage-backed securities, net
Periodic interest costs of interest rate swaps previously designated as hedges under GAAP, net	38			79		Interest expense
Total reclassifications	$	(76	)	$	104