Income taxes (Tables)

3 Months Ended

Mar. 31, 2013

Income Tax Disclosure [Abstract]

Component of Income Taxes Expenses

	Three months ended March 31,
	2012			2013
	(In millions)
Expected tax expense (benefit), at U.S. federal statutory income tax rate of 35%	$	62.2		$	(24.5	)
Incremental tax on earnings of non-U.S. companies		4.0			(1.4	)
Non-U.S. tax rates		(7.7	)		(.4	)
Adjustment to the reserve for uncertain tax positions, net		.5			2.0
Nondeductible expenses		.6			2.5
U.S. state income taxes and other, net		(.6	)		—
Income tax expense (benefit)	$	59.0		$	(21.8	)

	Three months ended March  31,
	2012			2013
	(In millions)
Comprehensive provision for income taxes (benefit) allocable to:
Continuing operations	$	59.0		$	(21.8	)
Discontinued operations		.6			—
Other comprehensive income (loss):
Marketable securities		(5.6	)		3.6
Currency translation		—			(3.8	)
Pension plans		.8			1.2
OPEB plans		(.2	)		(.2	)
Total	$	54.6		$	(21.0	)