The components of accumulated other comprehensive loss are as follows (dollars in millions):


	Unrealized Gains on Available- for-Sale Securities			Foreign Currency Translation Adjustments			Defined Benefit Plans			Change in Fair Value of Derivative Instruments			Total
Balances at December 31, 2015	$	13		$	(74	)	$	(135	)	$	(69	)	$	(265	)
Unrealized losses on available-for-sale securities, net of $3 income tax benefit		(6	)		—			—			—			(6	)
Foreign currency translation adjustments, net of $87 income tax benefit		—			(137	)		—			—			(137	)
Defined benefit plans, net of $13 income tax benefit		—			—			(22	)		—			(22	)
Change in fair value of derivative instruments, net of $8 of income taxes		—			—			—			12			12
Expense reclassified into operations from other comprehensive income, net of $7 and $40, respectively, income tax benefits		—			—			11			69			80

Balances at December 31, 2016		7			(211	)		(146	)		12			(338	)
Unrealized gains on available-for-sale securities		1			—			—			—			1
Foreign currency translation adjustments, net of $35 of income taxes		—			62			—			—			62
Defined benefit plans, net of $10 income tax benefit		—			—			(33	)		—			(33	)
Change in fair value of derivative instruments, net of $4 of income taxes		—			—			—			7			7
Expense (income) reclassified into operations from other comprehensive income, net of $1 of income taxes and $7 and $7 income tax benefits, respectively		(1	)		—			11			13			23

Balances at December 31, 2017		7			(149	)		(168	)		32			(278	)
Unrealized losses on available-for-sale securities, net of $2 income tax benefit		(5	)		—			—			—			(5	)
Foreign currency translation adjustments, net of $8 income tax benefit		—			(63	)		—			—			(63	)
Defined benefit plans, net of $10 of income taxes		—			—			34			—			34
Change in fair value of derivative instruments, net of $5 of income taxes		—			—			—			18			18
Expense (income) reclassified into operations from other comprehensive income, net of $5 income tax benefits and $2 of income taxes, respectively		—			—			16			(8	)		8
Reclassification of stranded tax effects		1			(71	)		(30	)		5			(95	)

Balances at December 31, 2018	$	3		$	(283	)	$	(148	)	$	47		$	(381	)