CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical)	3 Months Ended				6 Months Ended
	Jun. 30, 2020 $ / shares	Mar. 31, 2020 Dividend	Jun. 30, 2019 $ / shares	Mar. 31, 2019 Dividend	Jun. 30, 2020 $ / shares	Jun. 30, 2019 $ / shares
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in dollars per share) | $ / shares	$ 0.44		$ 0.43		$ 1.31	$ 1.28
Number of dividends declared per quarter | Dividend		2		2