Divestitures (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 31, 2011	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Divestitures and Assets Held for Sale [Abstract]
Purchase price for divestiture of business/controlling interest	$ 1,500
Proceeds from business divestitures, net of costs		12	0	28	10	1,450
Proceeds from divestiture of business, excluding amounts placed in escrow	1,426
Amount Placed In Escrow Included In Proceeds From Divestiture Of Business	24
Revenues generated by the Neurovascular business		$ 2	$ 36