Consolidated Statements of Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividends on common stock (USD per share)	$ 1.29	$ 1.18	$ 0.59
Treasury Stock, Shares, Acquired	2,111,725	4,668,722	226,848
Series A Preferred Stock
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividend rate on preferred stock			7.50%
Series B Preferred Stock
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividend rate on preferred stock		6.45%	6.45%
Series C Preferred Stock
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividend rate on preferred stock	5.70%	5.70%	5.70%