CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited)	3 Months Ended	6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Current assets:
Accounts Receivable, after Allowance for Credit Loss, Current	$ 1,904,800,000	$ 1,904,800,000	$ 1,785,500,000
Unbilled Contracts Receivable	137,800,000	137,800,000	211,800,000
Supplies inventories	487,800,000	487,800,000	470,600,000
Prepaid expenses and other	659,900,000	659,900,000	610,400,000
Disposal Group, Including Discontinued Operation, Assets, Current	0	0	1,226,100,000
Total current assets	5,120,900,000	5,120,900,000	4,625,000,000
Property, plant and equipment, net	2,762,100,000	2,762,100,000	2,794,100,000
Goodwill, net	6,182,200,000	6,182,200,000	6,123,700,000
Intangible Assets, Net (Excluding Goodwill)	3,154,100,000	3,154,100,000	3,123,600,000
Joint venture partnerships and equity method investments	67,200,000	67,200,000	65,700,000
Deferred Income Taxes and Other Assets, Current	6,400,000	6,400,000	6,400,000
Other assets, net	425,800,000	425,800,000	378,400,000
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	0	0	3,038,200,000
Total assets	17,718,700,000	17,718,700,000	20,155,100,000
Liabilities, Current [Abstract]
Accounts Payable, Current	713,100,000	713,100,000	852,200,000
Accrued Liabilities, Current	657,800,000	657,800,000	787,000,000.0
Deferred Revenue, Current	349,700,000	349,700,000	310,600,000
Operating Lease, Liability, Current	154,800,000	154,800,000	163,800,000
Finance Lease, Liability, Current	6,500,000	6,500,000	6,000,000.0
Current debt excluding finance lease liability	301,400,000	301,400,000	301,300,000
Long-term debt, less current portion	2,183,300,000	2,183,300,000	3,078,500,000
Long-term Debt, Excluding Current Maturities	5,042,400,000	5,042,400,000	5,038,800,000
Commitments and contingent liabilities	418,500,000	418,500,000	401,100,000
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	0	0	241,300,000
Operating Lease, Liability, Noncurrent	623,500,000	623,500,000	652,900,000
Finance Lease, Liability, Noncurrent	81,700,000	81,700,000	83,600,000
Deferred income taxes and other tax liabilities	564,500,000	564,500,000	543,400,000
Noncontrolling interest	8,913,900,000	8,913,900,000	10,039,600,000
Shareholders' equity:
Common stock, 92.8 and 93.5 shares outstanding at March 31, 2013 and December 31, 2012, respectively	19,800,000	19,800,000	18,900,000
Additional paid-in capital	94,400,000	94,400,000	0
Retained earnings	8,100,000	8,100,000	8,100,000
Accumulated other comprehensive income	(8,836,200,000)	(8,836,200,000)	(10,581,700,000)
Total liabilities and shareholders' equity	(153,700,000)	(153,700,000)	(493,200,000)
Stockholders' Equity Attributable to Parent	8,785,000,000	8,785,000,000	10,096,600,000
Liabilities and Equity	17,718,700,000	17,718,700,000	20,155,100,000
Net earnings	189,100,000	402,400,000
Cash and cash equivalents	1,930,600,000	1,930,600,000	320,600,000
Disposal Group, Including Discontinued Operation, Liabilities, Current	$ 0	$ 0	$ 657,600,000