CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical)	3 Months Ended				9 Months Ended
	Sep. 30, 2020 $ / shares	Mar. 31, 2020 Dividend	Sep. 30, 2019 $ / shares	Mar. 31, 2019 Dividend	Sep. 30, 2020 $ / shares	Sep. 30, 2019 $ / shares
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in dollars per share) | $ / shares	$ 0.44		$ 0.43		$ 1.75	$ 1.71
Number of dividends declared per quarter | Dividend		2		2