CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited)	3 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Current assets:
Accounts Receivable, after Allowance for Credit Loss, Current	$ 1,957,000,000	$ 1,957,000,000	$ 1,785,500,000
Unbilled Contracts Receivable	108,000,000.0	108,000,000.0	211,800,000
Supplies inventories	461,100,000	461,100,000	470,600,000
Prepaid expenses and other	700,200,000	700,200,000	610,400,000
Disposal Group, Including Discontinued Operation, Assets, Current	0	0	1,226,100,000
Total current assets	3,954,200,000	3,954,200,000	4,625,000,000
Property, plant and equipment, net	2,820,500,000	2,820,500,000	2,794,100,000
Goodwill, net	6,331,900,000	6,331,900,000	6,123,700,000
Intangible Assets, Net (Excluding Goodwill)	3,275,600,000	3,275,600,000	3,123,600,000
Joint venture partnerships and equity method investments	39,500,000	39,500,000	65,700,000
Deferred Income Taxes and Other Assets, Current	7,700,000	7,700,000	6,400,000
Other assets, net	456,600,000	456,600,000	378,400,000
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	0	0	3,038,200,000
Total assets	16,886,000,000	16,886,000,000	20,155,100,000
Liabilities, Current [Abstract]
Accounts Payable, Current	690,600,000	690,600,000	852,200,000
Accrued Liabilities, Current	689,700,000	689,700,000	787,000,000.0
Deferred Revenue, Current	360,800,000	360,800,000	310,600,000
Operating Lease, Liability, Current	162,300,000	162,300,000	163,800,000
Finance Lease, Liability, Current	6,400,000	6,400,000	6,000,000.0
Current debt excluding finance lease liability	991,000,000.0	991,000,000.0	301,300,000
Long-term debt, less current portion	2,900,800,000	2,900,800,000	3,078,500,000
Long-term Debt, Excluding Current Maturities	4,427,600,000	4,427,600,000	5,038,800,000
Commitments and contingent liabilities	423,000,000.0	423,000,000.0	401,100,000
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	0	0	241,300,000
Operating Lease, Liability, Noncurrent	662,400,000	662,400,000	652,900,000
Finance Lease, Liability, Noncurrent	80,200,000	80,200,000	83,600,000
Deferred income taxes and other tax liabilities	499,500,000	499,500,000	543,400,000
Noncontrolling interest	8,993,500,000	8,993,500,000	10,039,600,000
Shareholders' equity:
Common stock, 92.8 and 93.5 shares outstanding at March 31, 2013 and December 31, 2012, respectively	19,400,000	19,400,000	18,900,000
Additional paid-in capital	4,700,000	4,700,000	0
Retained earnings	7,700,000	7,700,000	8,100,000
Accumulated other comprehensive income	(8,069,500,000)	(8,069,500,000)	(10,581,700,000)
Total liabilities and shareholders' equity	(208,800,000)	(208,800,000)	(493,200,000)
Stockholders' Equity Attributable to Parent	7,873,100,000	7,873,100,000	10,096,600,000
Liabilities and Equity	16,886,000,000	16,886,000,000	20,155,100,000
Net earnings	183,600,000	586,000,000.0
Cash and cash equivalents	727,900,000	727,900,000	320,600,000
Disposal Group, Including Discontinued Operation, Liabilities, Current	$ 0	$ 0	$ 657,600,000