Share-Based Compensation Plans Restricted share unit activity (Details) (Restricted share units (RSUs) [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Restricted share units (RSUs) [Member]
Non-vested share awards (in shares)
Non-vested at beginning of period	9,759		10,432
Granted	2,498		3,505
Vested	(3,320)		(3,345)
Forfeited	(221)		(229)
Non-vested at end of period	8,716		10,363
Weighted Average Fair value (in dollars per share)
Non-vested at beginning of period	$ 51	[1]	$ 44	[1]
Granted	$ 84	[1]	$ 62	[1]
Vested	$ 49	[1]	$ 44	[1]
Forfeited	$ 54	[1]	$ 45	[1]
Non-vested at end of period	$ 61	[1]	$ 50	[1]

[1] Represents per share weighted average fair value of award at date of grant