Balance Sheet Components (Other Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Schedule of Other Assets [Line Items]
Operating lease right-of-use assets	$ 227.9	$ 254.6
Other long-term assets	123.4	58.2
Other assets	408.9	405.0
Other assets | Clean energy investments
Schedule of Other Assets [Line Items]
Equity method investments	$ 57.6	$ 92.2