Consolidated Statements Of Stockholders' Equity (USD $) In Millions	Common Stock	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance as of beginning-of-year at Dec. 31, 2010	$ 8,124	$ 2,711	$ 851
Stock compensation/issued for benefit plans	17
Effect of amendment to deferred compensation plans	(6)
Retirement of common stock/cancellation of shares	(545)	(30)
Net income (loss)		221		221
Dividends declared: Common (2013 - $0.520; 2012 - $0.360; 2011 - $0.230)		(71)
Other comprehensive income (loss), net of tax			1,829	1,829
Balance as of end-of-year at Dec. 31, 2011	7,590	2,831	2,680	13,101
Stock compensation/issued for benefit plans	23
Retirement of common stock/cancellation of shares	(492)
Net income (loss)		1,313		1,313
Dividends declared: Common (2013 - $0.520; 2012 - $0.360; 2011 - $0.230)		(100)
Other comprehensive income (loss), net of tax			1,128	1,128
Balance as of end-of-year at Dec. 31, 2012	7,121	4,044	3,808	14,973
Stock compensation/issued for benefit plans	69
Retirement of common stock/cancellation of shares	(314)	(136)
Net income (loss)		1,244		1,244
Dividends declared: Common (2013 - $0.520; 2012 - $0.360; 2011 - $0.230)		(139)
Other comprehensive income (loss), net of tax			(2,245)	(2,245)
Balance as of end-of-year at Dec. 31, 2013	$ 6,876	$ 5,013	$ 1,563	$ 13,452