Preferred Stock - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions										1 Months Ended	3 Months Ended	9 Months Ended
	Jul. 06, 2020	Jun. 26, 2020	May 14, 2020	Mar. 27, 2020	Mar. 04, 2020	Sep. 27, 2019	Jun. 28, 2019	Jun. 19, 2019	May 31, 2019	Feb. 07, 2019	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Equity [Abstract]
Loss on embedded derivative										$ 0.0	$ 32.8	$ 32.8	$ 0.0
Make-whole payment for embedded derivative	$ 205.2
Redeemable balance of cumulative preferred stock											$ 1,067.9	1,067.9
Accretion of redeemable preferred stock												$ 36.1
Preferred stock, dividends declared (USD per share)			$ 30.51		$ 30.51				$ 30.51
Aggregate dividends paid on preferred stock		$ 32.1		$ 32.0		$ 32.1	$ 10.7	$ 21.3