Changes in accumulated other comprehensive loss are presented in the table below. See Note 4 for further discussion of our marketable securities and Note 11 for discussion of our defined benefit pension plans.

	Three months ended						Six months ended
	June 30,						June 30,
	2018			2019			2018			2019
	(In millions)
Accumulated other comprehensive loss, net of tax:
Currency translation:
Balance at beginning of period	$	(201.2	)	$	(245.1	)	$	(211.9	)	$	(245.0	)
Other comprehensive income (loss)		(25.2	)		7.1			(14.5	)		7.0
Balance at end of period	$	(226.4	)	$	(238.0	)	$	(226.4	)	$	(238.0	)

Defined benefit pension plans:
Balance at beginning of period	$	(170.4	)	$	(177.7	)	$	(172.8	)	$	(180.0	)
Other comprehensive income - amortization of prior service cost and net losses included in net periodic pension cost		2.5			2.2			4.9			4.5
Balance at end of period	$	(167.9	)	$	(175.5	)	$	(167.9	)	$	(175.5	)

OPEB plans:
Balance at beginning of period	$	1.1		$	.6		$	1.2		$	.7
Other comprehensive loss - amortization of prior service credit and net losses included in net periodic OPEB cost		(.1	)		-			(.2	)		(.1	)
Balance at end of period	$	1.0		$	.6		$	1.0		$	.6

Marketable securities:
Balance at beginning of period	$	-		$	-		$	4.8		$	-
Change in accounting principle		-			-			(4.8	)		-
Balance at beginning of period, as adjusted		-			-			-			-
Other comprehensive loss - unrealized losses arising during the period		-			-			-			-
Balance at end of period	$	-		$	-		$	-		$	-

Total accumulated other comprehensive loss:
Balance at beginning of period	$	(370.5	)	$	(422.2	)	$	(378.7	)	$	(424.3	)
Change in accounting principle		-			-			(4.8	)		-
Balance at beginning of period, as adjusted		(370.5	)		(422.2	)		(383.5	)		(424.3	)
Other comprehensive income (loss)		(22.8	)		9.3			(9.8	)		11.4
Balance at end of period	$	(393.3	)	$	(412.9	)	$	(393.3	)	$	(412.9	)