Stockholders' Equity (Accumulated other Comprehensive Income (Loss) Attributable to Corporation, Net Applicable Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accumulated other comprehensive income (loss)	$ (2,059)	$ (1,866)
The Corporation [Member]
Unrealized translation	(26)	(221)
Unrecognized net actuarial loss and transition amount	(2,042)	(1,669)
Unrecognized prior service cost	61	60
Deferred (losses) gains on cash flow hedges	(52)	(36)
Accumulated other comprehensive income (loss)	$ (2,059)	$ (1,866)