The following table presents changes in accumulated other comprehensive loss balances:



Three Months Ended September 30,	2016			2015
	(in millions)
Unrealized gains (losses) on investment securities:
Balance at beginning of period	$	252		$	(83	)
Other comprehensive income (loss) for period:
Net unrealized gains (losses) arising during period, net of tax of $(65) million and $2 million, respectively	(108		)	7
Reclassification adjustment for gains realized in net income, net of tax of $(6) million and $(4) million, respectively⁽¹⁾	(10		)	(7		)
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity realized in net income, net of tax of $4 million and $3 million, respectively⁽²⁾	6			5
Total other comprehensive income (loss) for period	(112		)	5
Balance at end of period	140			(78		)
Unrealized losses on derivatives designated as cash flow hedges:
Balance at beginning of period	(226		)	(144		)
Other comprehensive income (loss) for period:
Net unrealized gains (losses) arising during period, net of tax of $5 million and $(19) million, respectively	6			(34		)
Reclassification adjustment for losses realized in net income, net of tax of $2 million and $1 million, respectively⁽³⁾	3			2
Total other comprehensive income (loss) for period	9			(32		)
Balance at end of period	(217		)	(176		)
Pension and postretirement benefit liability:
Balance at beginning and end of period	(3		)	(2		)
Total accumulated other comprehensive loss at end of period	$	(80	)	$	(256	)



Nine Months Ended September 30,	2016			2015
	(in millions)
Unrealized gains (losses) on investment securities:
Balance at beginning of period	$	(234	)	$	158
Other comprehensive income (loss) for period:
Net unrealized gains (losses) arising during period, net of tax of $243 million and $(126) million, respectively	407			(210		)
Reclassification adjustment for gains realized in net income, net of tax of $(30) million and $(26) million, respectively⁽¹⁾	(51		)	(43		)
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity realized in net income, net of tax of $11 million and $10 million, respectively⁽²⁾	18			17
Total other comprehensive income (loss) for period	374			(236		)
Balance at end of period	140			(78		)
Unrealized losses on derivatives designated as cash flow hedges:
Balance at beginning of period	(170		)	(156		)
Other comprehensive income (loss) for period:
Net unrealized gains (losses) arising during period, net of tax of $(33) million and $(12) million, respectively	(56		)	(25		)
Reclassification adjustment for losses realized in net income, net of tax of $5 million and $3 million, respectively⁽³⁾	9			5
Total other comprehensive loss for period	(47		)	(20		)
Balance at end of period	(217		)	(176		)
Pension and postretirement benefit liability:
Balance at beginning of period	(3		)	(3		)
Other comprehensive income (loss) for period:
Change in unfunded pension and postretirement liability, net of tax of less than $1 million	—			1
Total other comprehensive income for period	—			1
Balance at end of period	(3		)	(2		)
Total accumulated other comprehensive loss at end of period	$	(80	)	$	(256	)


⁽¹⁾	Amount reclassified to net income is included in other securities gains, net in our consolidated statement of income.

⁽²⁾

Amount amortized to net income is included in interest income in our consolidated statement of income. During 2014, we transferred securities from available-for-sale to held-to-maturity. At the date of transfer, AOCI included net pretax unrealized losses of $234 million related to the transferred securities which will be amortized over the remaining contractual life of each security as an adjustment of yield in a manner consistent with the amortization of any premium or discount.


⁽³⁾	Amount reclassified to net income is included in interest income (expense) in our consolidated statement of income.