Fair Value Measurements - Narrative (Details) - Senior Notes [Member] - USD ($)	Dec. 31, 2021	Feb. 17, 2021	Feb. 09, 2021	Oct. 31, 2019	Sep. 30, 2019	Apr. 15, 2015
$400 Million 5% Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount	$ 400,000,000	$ 400,000,000	$ 400,000,000			$ 400,000,000.0
Stated interest rate (as a percent)	5.00%	5.00%	5.00%			5.00%
$600 Million 4.50% Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount	$ 600,000,000	$ 600,000,000.0
Stated interest rate (as a percent)	4.50%	4.50%
Debt amount	$ 590,600,000
Fair value of notes	598,700,000
$700 Million 4.75% Senior Note [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount	$ 700,000,000			$ 700,000,000	$ 700,000,000
Stated interest rate (as a percent)	4.75%			4.75%	4.75%
Debt amount	$ 692,600,000
Fair value of notes	$ 722,300,000