General, Description of Business, and Basis of Presentation General, Description of Business, and Basis of Presentation (Detail1) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Capital in excess of par value [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	$ 408
Noncontrolling Interests [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	1,169
Deferred Income Taxes [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	$ 242