Income Taxes Income Taxes Disclosure (Details) - USD ($)	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2021	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Income Tax Contingency [Line Items]
Liability for Uncertainty in Income Taxes, Current			$ 140,000,000.0			$ 15,000,000.0
Increase to the Income Tax Provision			$ 129,900,000
Increase in liability for uncertain tax positions		$ 89,200,000			$ 126,900,000
Reduction in liability for Unrecognized Tax Benefits							$ 46,100,000
Scenario, Forecast
Income Tax Contingency [Line Items]
Expected reduction to tax expense by CARES Act				$ 27,000,000.0
Scenario, Adjustment [Member]
Income Tax Contingency [Line Items]
Expected reduction to tax expense by CARES Act	$ 16,500,000