Shareholders' Equity and Noncontrolling Interests, Dividends (Details) - USD ($) $ / shares in Units, $ in Millions					3 Months Ended		9 Months Ended
	Oct. 26, 2021	Oct. 25, 2021	Oct. 20, 2020	Oct. 19, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Dividends declared per share (in dollars per share)			$ 0.145	$ 0.125	$ 0.145	$ 0.125	$ 0.435	$ 0.375
Dividends declared					$ 86.7	$ 74.7	$ 259.9	$ 223.2
Dividends paid (including those declared in the prior year)					$ 86.6	$ 74.6	$ 260.0	$ 223.0
Subsequent Event
Dividends declared per share (in dollars per share)	$ 0.20	$ 0.145