Medicare Part D (Tables)

12 Months Ended

Dec. 31, 2011

Medicare Part D [Abstract]

Balance Sheet Amounts Associated With Medicare Part D

	2011						2010
	Risk Corridor Settlement			CMS Subsidies/ Discounts			Risk Corridor Settlement			CMS Subsidies/ Discounts
	(in millions)
Other current assets	$	2		$	363		$	1		$	16
Trade accounts payable and accrued expenses		(331	)		(139	)		(389	)		(170	)
Net current (liability) asset	$	(329	)	$	224		$	(388	)	$	(154	)