Stockholders' Equity (Accumulated other Comprehensive Income (Loss) Attributable to Corporation, Net Applicable Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Accumulated other comprehensive income (loss)	$ (1,866)	$ (1,466)
The Corporation [Member]
Unrealized translation	(221)	15
Unrecognized net actuarial loss and transition amount	(1,669)	(1,460)
Unrecognized prior service cost	60	(16)
Deferred (losses) gains on cash flow hedges	(34)	(3)
Unrealized holding losses on securities	(2)	(2)
Accumulated other comprehensive income (loss)	$ (1,866)	$ (1,466)