CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Accounts Receivable, after Allowance for Credit Loss, Current	$ 2,083,700,000	$ 1,913,300,000
Unbilled Contracts Receivable	120,400,000	185,400,000
Supplies inventories	475,000,000.0	474,600,000
Prepaid expenses and other	678,100,000	655,300,000
Total current assets	3,456,500,000	3,765,400,000
Property, plant and equipment, net	2,897,800,000	2,911,800,000
Goodwill, net	6,218,900,000	6,142,500,000
Intangible Assets, Net (Excluding Goodwill)	3,394,100,000	3,342,000,000
Joint venture partnerships and equity method investments	17,700,000	26,900,000
Other assets, net	546,000,000.0	536,500,000
Total assets	16,531,000,000	16,725,100,000
Liabilities, Current [Abstract]
Accounts Payable, Current	695,500,000	827,500,000
Accrued Liabilities, Current	649,300,000	804,000,000.0
Deferred Revenue, Current	377,500,000	421,700,000
Operating Lease, Liability, Current	171,300,000	165,800,000
Finance Lease, Liability, Current	6,400,000	6,400,000
Current debt excluding finance lease liability	2,041,500,000	999,800,000
Long-term debt, less current portion	3,941,500,000	3,225,200,000
Long-term Debt, Excluding Current Maturities	3,047,600,000	4,054,700,000
Commitments and contingent liabilities	468,200,000	409,300,000
Operating Lease, Liability, Noncurrent	624,600,000	648,900,000
Finance Lease, Liability, Noncurrent	77,100,000	78,600,000
Deferred income taxes and other tax liabilities	397,200,000	417,900,000
Noncontrolling interest	8,556,200,000	8,834,600,000
Shareholders' equity:
Common stock, 92.8 and 93.5 shares outstanding at March 31, 2013 and December 31, 2012, respectively	15,200,000	15,500,000
Additional paid-in capital	82,000,000.0	38,400,000
Retained earnings	7,700,000	7,700,000
Accumulated other comprehensive income	(8,055,300,000)	(7,888,200,000)
Total liabilities and shareholders' equity	(185,400,000)	(59,300,000)
Stockholders' Equity Attributable to Parent	7,959,600,000	7,875,000,000
Liabilities and Equity	16,531,000,000	16,725,100,000
Net earnings	228,300,000
Cash and cash equivalents	$ 99,300,000	$ 536,800,000