CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Accounts Receivable, after Allowance for Credit Loss, Current	$ 2,344,800,000	$ 2,222,000,000
Unbilled Contracts Receivable	705,100,000	795,400,000
Supplies inventories	481,400,000	470,600,000
Prepaid expenses and other	769,800,000	707,000,000.0
Total current assets	4,695,000,000	4,625,000,000
Property, plant and equipment, net	2,944,100,000	2,956,200,000
Goodwill, net	8,116,000,000	8,121,000,000
Intangible Assets, Net (Excluding Goodwill)	3,912,300,000	3,946,900,000
Joint venture partnerships and equity method investments	65,800,000	65,700,000
Deferred Income Taxes and Other Assets, Current	7,700,000	7,600,000
Other assets, net	459,100,000	432,700,000
Total assets	20,200,000,000	20,155,100,000
Liabilities, Current [Abstract]
Accounts Payable, Current	880,700,000	934,800,000
Accrued Liabilities, Current	929,500,000	1,068,800,000
Deferred Revenue, Current	586,700,000	582,100,000
Operating Lease, Liability, Current	181,200,000	185,500,000
Finance Lease, Liability, Current	6,100,000	6,000,000.0
Current debt excluding finance lease liability	301,400,000	301,300,000
Long-term debt, less current portion	2,885,600,000	3,078,500,000
Long-term Debt, Excluding Current Maturities	5,052,300,000	5,038,800,000
Commitments and contingent liabilities	413,600,000	422,800,000
Operating Lease, Liability, Noncurrent	668,300,000	679,700,000
Finance Lease, Liability, Noncurrent	82,000,000.0	83,600,000
Deferred income taxes and other tax liabilities	737,400,000	736,200,000
Noncontrolling interest	9,839,200,000	10,039,600,000
Shareholders' equity:
Common stock, 92.8 and 93.5 shares outstanding at March 31, 2013 and December 31, 2012, respectively	19,300,000	18,900,000
Additional paid-in capital	47,700,000	0
Retained earnings	8,100,000	8,100,000
Accumulated other comprehensive income	(10,729,900,000)	(10,581,700,000)
Total liabilities and shareholders' equity	(444,200,000)	(493,200,000)
Stockholders' Equity Attributable to Parent	10,341,500,000	10,096,600,000
Liabilities and Equity	20,200,000,000	20,155,100,000
Net earnings	213,300,000
Cash and cash equivalents	$ 393,900,000	$ 430,000,000.0