Capital Stock (Details) $ / shares in Units, shares in Thousands, $ in Millions					1 Months Ended
	Sep. 10, 2020 $ / shares	Aug. 07, 2020 $ / shares	Jun. 12, 2020 $ / shares	Mar. 20, 2020 $ / shares	Jun. 30, 2020 USD ($) vote $ / shares shares	May 31, 2020 $ / shares	Feb. 29, 2020 $ / shares	Dec. 31, 2019 shares
Banking Regulation, Total Capital [Abstract]
Common shares, authorized (in shares) | shares					233,333			233,333
Number of votes per share | vote					1
Maximum percent of individual ownership					9.50%
Minimum number of votes per share for other shareholders under 9.5% shareholder provision | vote					1
Number of shares issued in transaction | shares					13,800
Price per share (in dollars per shares)					$ 33.25
Consideration received on transaction | $					$ 440.0
Dividends Payable [Line Items]
Quarterly cash dividends declared (in dollars per share)						$ 0.16	$ 0.16
Quarterly cash dividends paid (in dollars per share)			$ 0.16	$ 0.16
Subsequent Event
Dividends Payable [Line Items]
Quarterly cash dividends declared (in dollars per share)		$ 0.16
Forecast
Dividends Payable [Line Items]
Quarterly cash dividends paid (in dollars per share)	$ 0.16