Debt (Term Convertible Trust Securities) (Details) $ / shares in Units, security in Thousands, $ in Millions	24 Months Ended
	Dec. 31, 2000 USD ($)	Dec. 31, 1999 USD ($) security $ / shares
Debt Disclosure [Abstract]
Term convertible preferred securities issued by special purpose business trust | security		10,350
Current redemption value of term convertible preferred securities issued by special purpose business trust | $ / shares		$ 50
Term convertible preferred securities issued by special purpose business trust par per share | $ / shares		$ 0.844
Term convertible preferred securities issued by special purpose business trust total proceeds | $	$ 517
Junior subordinated convertible debentures purchased with proceeds from issuance of term convertible preferred securities | $		$ 517
Term convertible preferred securities dividend rate		6.75%