Consolidated Statements Of Shareholder's Equity And Comprehensive Income (USD $) In Millions		Common Shares [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Comprehensive Income [Member]	Total
Balance at Dec. 31, 2008		$ 5	$ 730	$ (3)		$ 118	$ 732
Non-cash capital contributions from Boeing			2				2
Cash dividends to Boeing (including return of capital)			(36)		(57)		(93)
Net income					57	57	57
Unrealized gain on derivative instruments, net of tax of $1				2		2	2
Unrealized loss (gain) on investments, net of tax	[1]			(1)		(1)	(1)
Balance at Dec. 31, 2009		5	696	(2)		58	699
Non-cash capital contributions from Boeing			2				2
Cash dividends to Boeing (including return of capital)			(16)		(92)		(108)
Net income					92	92	92
Reclassification adjustment for gain realized on investments, net of tax of $1				(2)		(2)	(2)
Unrealized loss (gain) on investments, net of tax				4		4	4
Balance at Dec. 31, 2010		5	682			94	687
Non-cash capital contributions from Boeing			1				1
Cash dividends to Boeing (including return of capital)			(160)		(68)		(228)
Net income					83	83	83
Unrealized loss (gain) on investments, net of tax	[1]			1		1	1
Balance at Dec. 31, 2011		$ 5	$ 523	$ 1	$ 15	$ 84	$ 544

[1] At December 31, 2011 and 2009, the tax amount related to the unrealized gain and loss on investments was less than $1.