QUARTERLY FINANCIAL DATA (UNAUDITED) - SCHEDULE OF QUARTERLY FINANCIAL INFORMATION (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Data [Abstract]
Revenues	$ 973.6	$ 905.3	$ 855.0	$ 842.9	$ 1,074.8	$ 968.3	$ 1,073.1	$ 1,006.0	$ 3,576.8	$ 4,122.2	$ 3,821.1
Income before income taxes	55.4	137.2	175.4	149.3	148.1	128.0	101.6	190.0	517.3	567.7	344.3
Income tax expense	12.0	32.2	39.3	37.0	32.3	28.2	23.6	42.6	120.5	126.7	42.5
Net income	$ 43.4	$ 105.0	$ 136.1	$ 112.3	$ 115.8	$ 99.8	$ 78.0	$ 147.4	$ 396.8	$ 441.0	$ 301.8
Basic:
Net income (in USD per share)	$ 0.38	$ 0.92	$ 1.18	$ 0.95	$ 0.95	$ 0.79	$ 0.59	$ 1.10	$ 3.43	$ 3.43	$ 2.12
Diluted:
Net income (in USD per share)	$ 0.37	$ 0.91	$ 1.16	$ 0.93	$ 0.93	$ 0.77	$ 0.58	$ 1.08	$ 3.37	$ 3.36	$ 2.11