Fair Value Measurements (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Assets
Available-for-sale securities	$ 1,384	$ 1,370
U.S. treasury bonds \| Level 1
Assets
Available-for-sale securities		12
U.S. treasury bonds \| Level 1 \| Recurring basis
Assets
Available-for-sale securities	10	12
Large capitalization value \| Level 1 \| Recurring basis
Assets
Available-for-sale securities	122	122
Smaller company growth \| Level 1 \| Recurring basis
Assets
Available-for-sale securities	27	31
Level 1 \| Recurring basis
Assets
Available-for-sale securities	159	165
Total Assets	159	165
Other U.S. and non-U.S. government bonds \| Level 2 \| Recurring basis
Assets
Available-for-sale securities	74	77
Corporate bonds \| Level 2 \| Recurring basis
Assets
Available-for-sale securities	556	511
Asset-backed securities \| Level 2 \| Recurring basis
Assets
Available-for-sale securities	116	136
Mortgage-backed debt securities \| U.S. governmental agency \| Level 2 \| Recurring basis
Assets
Available-for-sale securities	290	273
Residential mortgage-backed securities \| Level 2 \| Recurring basis
Assets
Available-for-sale securities	32	40
Commercial mortgage-backed securities \| Level 2 \| Recurring basis
Assets
Available-for-sale securities	157	168
Level 2 \| Recurring basis
Assets
Available-for-sale securities	1,225	1,205
Derivative financial instruments, net	261	267
Total Assets	1,486	1,472
Level 3 \| Recurring basis
Liabilities
Guarantees	7	10
Total Liabilities	7	10
U.S. treasury bonds \| Fair Value
Assets
Available-for-sale securities		12
U.S. treasury bonds \| Fair Value \| Recurring basis
Assets
Available-for-sale securities	10	12
Other U.S. and non-U.S. government bonds \| Fair Value \| Recurring basis
Assets
Available-for-sale securities	74	77
Corporate bonds \| Fair Value \| Recurring basis
Assets
Available-for-sale securities	556	511
Asset-backed securities \| Fair Value \| Recurring basis
Assets
Available-for-sale securities	116	136
Mortgage-backed debt securities \| U.S. governmental agency \| Fair Value \| Recurring basis
Assets
Available-for-sale securities	290	273
Residential mortgage-backed securities \| Fair Value \| Recurring basis
Assets
Available-for-sale securities	32	40
Commercial mortgage-backed securities \| Fair Value \| Recurring basis
Assets
Available-for-sale securities	157	168
Large capitalization value \| Fair Value \| Recurring basis
Assets
Available-for-sale securities	122	122
Smaller company growth \| Fair Value \| Recurring basis
Assets
Available-for-sale securities	27	31
Fair Value \| Recurring basis
Assets
Available-for-sale securities	1,384	1,370
Derivative financial instruments, net	261	267
Total Assets	1,645	1,637
Liabilities
Guarantees	7	10
Total Liabilities	7	10
U.S. treasury bonds
Assets
Available-for-sale securities	10	12
Other U.S. and non-U.S. government bonds
Assets
Available-for-sale securities	74	77
Corporate bonds
Assets
Available-for-sale securities	556	511
Asset-backed securities
Assets
Available-for-sale securities	116	136
Mortgage-backed debt securities \| U.S. governmental agency
Assets
Available-for-sale securities	290	273
Residential mortgage-backed securities
Assets
Available-for-sale securities	32	40
Commercial mortgage-backed securities
Assets
Available-for-sale securities	157	168
Large capitalization value
Assets
Available-for-sale securities	122	122
Smaller company growth
Assets
Available-for-sale securities	$ 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.

+ References+ Details