CONSOLIDATED BALANCE SHEETS - USD ($)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Deferred Revenue, Revenue Recognized	$ 78,900,000	$ 99,700,000
Current assets:
Cash and Cash Equivalents, at Carrying Value	536,800,000	320,600,000
Accounts receivable, net	1,913,300,000	1,785,500,000
Unbilled Contracts Receivable	185,400,000	211,800,000
Supplies inventory	474,600,000	470,600,000
Prepaid expenses and other	655,300,000	610,400,000
Disposal Group, Including Discontinued Operation, Assets, Current	0	1,226,100,000
Total current assets	3,765,400,000	4,625,000,000
Property, plant and equipment, net	2,911,800,000	2,794,100,000
Goodwill, net	6,142,500,000	6,123,700,000
Intangible assets, net	3,342,000,000	3,123,600,000
Joint venture partnerships and equity method investments	26,900,000	65,700,000
Deferred Income Tax Assets, Net	0	6,400,000
Other assets, net	536,500,000	378,400,000
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	0	3,038,200,000
Total assets	16,725,100,000	20,155,100,000
Current liabilities:
Finance Lease, Liability, Current	6,400,000	6,000,000.0
Accounts payable	827,500,000	852,200,000
Accrued expenses and other	804,000,000.0	787,000,000.0
Deferred Revenue, Current	421,700,000	310,600,000
Operating Lease, Liability, Current	165,800,000	163,800,000
Short-term borrowings and current portion of long-term debt	999,800,000	301,300,000
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	657,600,000
Total current liabilities	3,225,200,000	3,078,500,000
Long-term debt, less current portion	4,054,700,000	5,038,800,000
Total maturities, due beyond one year	648,900,000	652,900,000
Total maturities, due beyond one year	78,600,000	83,600,000
Deferred income taxes and other tax liabilities	417,900,000	543,400,000
Other liabilities	409,300,000	401,100,000
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	0	241,300,000
Total liabilities	8,834,600,000	10,039,600,000
Commitments and contingent liabilities
Noncontrolling interest	15,500,000	18,900,000
Shareholders’ equity
Common stock, 83.9 and 88.2 shares outstanding at December 31, 2023 and 2022, respectively	7,700,000	8,100,000
Additional paid-in capital	38,400,000	0
Retained earnings	7,888,200,000	10,581,700,000
Accumulated other comprehensive loss	(59,300,000)	(493,200,000)
Total shareholders’ equity	7,875,000,000	10,096,600,000
Total liabilities and shareholders’ equity	$ 16,725,100,000	20,155,100,000
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents		109,400,000
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net		436,500,000
Disposal Group, Including Discontinued Operation, Other Assets, Current		583,600,000
Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current		96,600,000
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent		162,100,000
Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent		1,997,300,000
Disposal Group, Including Discontinued Operation, Intangible Assets, Noncurrent		823,300,000
Disposal Group, Including Discontinued Operation, Deferred Tax Assets		1,200,000
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		54,300,000
Disposal Group, Including Discontinued Operation, Assets		4,264,300,000
Disposal Group, Including Discontinued Operation, Accounts Payable, Current		82,600,000
Disposal Group, Including Discontinued Operation, Accrued Liabilities, Current		281,800,000
Disposal Group, Including Discontinued Operation, Deferred Revenue, Current		271,500,000
Disposal Group, Including Discontinued Operation, Short-term operating lease liabilities		21,700,000
Disposal Group, Including Discontinued Operation, Operating lease liabilities		26,800,000
Disposal Group, Including Discontinued Operation, Accrued Income Tax Payable, Noncurrent		192,800,000
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent		21,700,000
Disposal Group, Including Discontinued Operation, Liabilities		$ 898,900,000

Represents the noncurrent portion of deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax, combined with the noncurrent portion of the amount recognized for uncertain tax positions as of the balance sheet date. A noncurrent taxable temporary difference is a difference between the tax basis and the carrying amount of a noncurrent asset or liability in the financial statements prepared in accordance with generally accepted accounting principles. In a classified statement of financial position, an enterprise shall separate deferred tax liabilities and assets into a current amount and a noncurrent amount. Deferred tax liabilities and assets shall be classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, shall be classified according to the expected reversal date of the temporary difference.

No definition available.