CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 1,233,500,000	$ 1,472,700,000
Accounts Receivable, after Allowance for Credit Loss, Current	2,239,600,000	2,261,500,000
Unbilled Contracts Receivable	800,000,000.0	716,800,000
Supplies inventories	440,700,000	401,400,000
Prepaid expenses and other	515,700,000	478,100,000
Total current assets	5,229,500,000	5,330,500,000
Property, plant and equipment, net	2,807,600,000	2,815,400,000
Goodwill, net	8,165,800,000	7,958,900,000
Intangible Assets, Net (Excluding Goodwill)	3,972,500,000	3,735,500,000
Joint venture partnerships and equity method investments	62,200,000	60,900,000
Deferred Income Taxes and Other Assets, Current	28,200,000	21,600,000
Other assets, net	462,600,000	462,600,000
Total assets	20,728,400,000	20,385,400,000
Liabilities, Current [Abstract]
Accounts Payable, Current	623,600,000	621,300,000
Accrued Liabilities, Current	1,260,400,000	1,404,100,000
Deferred Revenue, Current	556,000,000.0	558,500,000
Operating Lease, Liability, Current	189,500,000	187,000,000.0
Finance Lease, Liability, Current	10,400,000	10,500,000
Current debt excluding finance lease liability	1,600,000	1,500,000
Long-term debt, less current portion	2,641,500,000	2,782,900,000
Long-term Debt, Excluding Current Maturities	5,383,300,000	5,416,500,000
Commitments and contingent liabilities	489,800,000	402,000,000.0
Operating Lease, Liability, Noncurrent	623,700,000	642,500,000
Finance Lease, Liability, Noncurrent	83,200,000	84,600,000
Deferred income taxes and other tax liabilities	765,200,000	762,900,000
Noncontrolling interest	9,986,700,000	10,091,400,000
Shareholders' equity:
Common stock, 92.8 and 93.5 shares outstanding at March 31, 2013 and December 31, 2012, respectively	20,600,000	20,600,000
Additional paid-in capital	29,100,000	0
Retained earnings	8,500,000	8,500,000
Accumulated other comprehensive income	(10,948,400,000)	(10,456,800,000)
Total liabilities and shareholders' equity	(264,900,000)	(191,900,000)
Stockholders' Equity Attributable to Parent	10,721,100,000	10,273,400,000
Liabilities and Equity	20,728,400,000	$ 20,385,400,000
Net earnings	$ 492,100,000