Stockholders' Equity Dividends Declared (Tables)

12 Months Ended

Dec. 31, 2015

Dividends Declared [Abstract]

Dividends Declared

During the year ended December 31, 2015, the following dividends were declared or paid:

Equity Type	Declaration Date	Record Date	Payment Date	Dividends Per Share		Aggregate Payment Amount (In millions)
Common Stock	February 12, 2015	March 20, 2015	March 31, 2015	$	0.820	$	274.7	(a)
Common Stock	May 29, 2015	June 19, 2015	June 30, 2015	$	0.820	$	274.5	(a)
Common Stock	July 30, 2015	September 18, 2015	September 30, 2015	$	0.820	$	274.3	(a)
Common Stock	October 19, 2015	December 18, 2015	December 31, 2015	$	0.885	$	296.5	(a)
Convertible Preferred Stock	December 22, 2014	January 15, 2015	February 2, 2015	$	1.125	$	11.0
Convertible Preferred Stock	March 27, 2015	April 15, 2015	May 1, 2015	$	1.125	$	11.0
Convertible Preferred Stock	June 21, 2015	July 15, 2015	August 3, 2015	$	1.125	$	11.0
Convertible Preferred Stock	September 23, 2015	October 15, 2015	November 2, 2015	$	1.125	$	11.0
Convertible Preferred Stock	December 16, 2015	January 16, 2016	February 1, 2016	$	1.125	$	11.0	(b)

(a) Inclusive of dividends accrued for holders of unvested RSUs.

(b) Represents amount paid on February 1, 2016 based on holders of record on January 16, 2016.