Discontinued Operations - Schedule of Discontinued Operations Reflected in Consolidated Condensed Statements of Income (Parenthetical) (Detail) (CAC [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
CAC [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax benefit on loss on sale	$ 41