Revenue Recognition - Changes in Contract Assets and Contract Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accounts receivables current
Contract Receivables	$ 507.0	$ 791.2
Contract with customer assets current
Contract Assets (Current)	48.6	55.8
Contract with customer non-current asset
Contract Assets (Long-term)	24.9	32.3
Contract with customer liability current
Contract Liabilities (Current)	66.8	116.7
Contract with customer liability non-current
Contract Liabilities (Long-term)	$ 70.5	$ 69.7
Contract Asset Balance
Contract percentage recognized	60.00%
2020	20.00%
2021 or thereafter	20.00%