Debt (Schedule of Letters of Credit Facilities) (Details)	Mar. 31, 2022 USD ($)
Letter of Credit [Member]
Debt Instrument [Line Items]
Letters of credit, Limit	$ 175,000,000.0
Letters of credit, Available	166,900,000
Letter of Credit [Member] | Bi-lateral Facility [Member]
Debt Instrument [Line Items]
Letters of credit, Limit	25,000,000.0
Letters of credit, Available	16,900,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Letters of credit, Limit	500,000,000.0
Revolving Credit Facility [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Letters of credit, Limit	150,000,000.0
Letters of credit, Available	$ 150,000,000.0