Share-Based Compensation Plans Share options activity (Details) (Share options [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Share options [Member]
Share Options (in shares)
Beginning outstanding	3,462	5,611
Granted	0	0
Exercised	(953)	(1,694)
Forfeited and expired	(6)	(29)
Outstanding at end of period	2,503	3,888
Exercisable at end of period	2,464	3,681
Weighted-Average Exercise Price (in dollars per share)
Beginning outstanding	$ 32	$ 32
Granted	$ 0	$ 0
Exercised	$ 32	$ 32
Forfeited and expired	$ 37	$ 34
Outstanding at end of period	$ 32	$ 32
Exercisable at end of period	$ 32	$ 32