Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2020		Sep. 30, 2020		Jun. 30, 2020		Mar. 31, 2020		Dec. 31, 2019		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Total revenue	$ 3,426.1		$ 3,335.7		$ 3,158.5		$ 3,130.3		$ 3,726.8		$ 3,335.1		$ 3,434.2		$ 2,913.0		$ 13,050.6	$ 13,409.1	$ 12,552.9
Total costs and expenses																	$ 15,936.2	14,935.8	13,470.5
Net Income (Loss) Attributable to Parent	$ (39.3)		$ (3.9)		$ 11.7		$ (3,256.1)		$ (2,414.0)		$ (119.1)		$ 97.0		$ 20.9			$ (2,415.2)	$ (1,921.6)
Basic earnings (loss) per share (usd per share)	$ (0.09)	[1]	$ (0.01)	[1]	$ 0.03	[1]	$ (7.28)	[1]	$ (5.40)	[1]	$ (0.27)	[1]	$ 0.22	[1]	$ 0.05	[1]	$ (7.33)	$ (5.39)
Earnings Per Share, Diluted	$ (0.09)	[1]	$ (0.01)	[1]	$ 0.03	[1]	$ (7.28)	[1]	$ (5.40)	[1]	$ (0.27)	[1]	$ 0.21	[1]	$ 0.05	[1]	$ (7.33)	$ (5.39)	$ (4.20)
Basic (in shares)																	448.7	448.0	458.0
Weighted Average Number of Shares Outstanding, Diluted																	448.7	448.0	458.0
Service [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Product and service revenue																	$ 9,708.2	$ 9,789.7	$ 9,057.6
Cost of product revenue																	8,261.9	7,767.2	7,452.7
Product [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Product and service revenue																	3,200.4	3,352.9	3,272.6
Cost of product revenue																	$ 2,830.8	$ 3,015.6	$ 2,676.9
Restatement Adjustment
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Basic earnings (loss) per share (usd per share)																			$ (4.20)
Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life																	2 years
Minimum | Vessels
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life																	10 years
Minimum | Buildings
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life																	10 years
Minimum | Machinery and equipment
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life																	3 years
Minimum | Software and software development costs
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life																	3 years
Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life																	20 years
Maximum | Vessels
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life																	30 years
Maximum | Buildings
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life																	50 years
Maximum | Machinery and equipment
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life																	20 years
Maximum | Software and software development costs
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life																	10 years
Maximum | Internet website costs
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life																	3 years

[1] Basic and diluted earnings (loss) per share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted earnings (loss) per share.