Available-For-Sale Securities (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Schedule of Available-for-sale Securities.
Cost Basis	$ 1,328	$ 1,293
Unrealized pretax net gains (losses)	56	77
Fair Value	1,384	1,370
U.S. treasury bonds
Schedule of Available-for-sale Securities.
Cost Basis	10	12
Fair Value	10	12
Other U.S. and non-U.S. government bonds
Schedule of Available-for-sale Securities.
Cost Basis	72	76
Unrealized pretax net gains (losses)	2	1
Fair Value	74	77
Corporate bonds
Schedule of Available-for-sale Securities.
Cost Basis	526	481
Unrealized pretax net gains (losses)	30	30
Fair Value	556	511
Asset-backed securities
Schedule of Available-for-sale Securities.
Cost Basis	117	136
Unrealized pretax net gains (losses)	(1)
Fair Value	116	136
Mortgage-backed debt securities \| U.S. governmental agency
Schedule of Available-for-sale Securities.
Cost Basis	274	258
Unrealized pretax net gains (losses)	16	15
Fair Value	290	273
Residential mortgage-backed securities
Schedule of Available-for-sale Securities.
Cost Basis	36	43
Unrealized pretax net gains (losses)	(4)	(3)
Fair Value	32	40
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities.
Cost Basis	156	164
Unrealized pretax net gains (losses)	1	4
Fair Value	157	168
Large capitalization value
Schedule of Available-for-sale Securities.
Cost Basis	116	100
Unrealized pretax net gains (losses)	6	22
Fair Value	122	122
Smaller company growth
Schedule of Available-for-sale Securities.
Cost Basis	21	23
Unrealized pretax net gains (losses)	6	8
Fair Value	$ 27	$ 31

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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