Share-Based Compensation Plans Share options activity (Details) (Share options [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Share options [Member]
Share Options (in shares)
Beginning outstanding	3,462	5,611
Granted	0	0
Exercised	(839)	(1,318)
Forfeited and expired	(3)	(2)
Outstanding at end of period	2,620	4,291
Exercisable at end of period	2,572	4,063
Weighted-Average Exercise Price (in dollars per share)
Beginning outstanding	$ 32	$ 32
Granted	$ 0	$ 0
Exercised	$ 32	$ 31
Forfeited and expired	$ 37	$ 33
Outstanding at end of period	$ 32	$ 33
Exercisable at end of period	$ 32	$ 32