Equity (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Dividends Payable [Line Items]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.35
Dividends, Common Stock, Cash	$ 117,200	[1]
Common stock repurchased during period, shares	0.3
Purchases of capital stock	21,417,000		23,579,000
Paid prior to quarter end [Member]
Dividends Payable [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 1.1625
Dividends, Preferred Stock, Cash	11,400
Paid subsequent to quarter end [Member]
Dividends Payable [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 1.1250
Dividends, Preferred Stock, Cash	$ 11,000	[2]
Common Stock [Member]
Dividends Payable [Line Items]
Dividends Payable, Date Declared	Feb. 20, 2014
Dividends Payable, Date to be Paid	Mar. 31, 2014
Dividends Payable, Date of Record	Mar. 20, 2014
Mandatory Convertible Preferred stock [Member] | Paid prior to quarter end [Member]
Dividends Payable [Line Items]
Dividends Payable, Date Declared	Dec. 31, 2013
Dividends Payable, Date to be Paid	Feb. 03, 2014
Dividends Payable, Date of Record	Jan. 14, 2014
Mandatory Convertible Preferred stock [Member] | Paid subsequent to quarter end [Member]
Dividends Payable [Line Items]
Dividends Payable, Date Declared	Mar. 25, 2014
Dividends Payable, Date to be Paid	May 01, 2014
Dividends Payable, Date of Record	Apr. 15, 2014

[1] Inclusive of dividends accrued for holders of unvested restricted stock units.

[2] Represents amount paid on May 1, 2014, based on holders of record on April 15, 2014.