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, 2019		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Total revenue	$ 3,726.8		$ 3,335.1		$ 3,434.2		$ 2,913.0		$ 3,323.0		$ 3,143.8		$ 2,960.9		$ 3,125.2		$ 13,409.1	$ 12,552.9	$ 15,056.9
Total costs and expenses																	$ 14,935.8	13,470.5	14,091.7
Net Income (Loss) Attributable to Parent	$ (2,414.0)		$ (119.1)		$ 97.0		$ 20.9		$ (2,259.3)		$ 136.9		$ 105.7		$ 95.1			$ (1,921.6)	$ 113.3
Basic earnings (loss) per share (usd per share)	$ (5.40)	[1]	$ (0.27)	[1]	$ 0.22	[1]	$ 0.05	[1]	$ (5.00)	[1]	$ 0.30	[1]	$ 0.23	[1]	$ 0.20	[1]	$ (5.39)	$ (4.20)
Earnings Per Share, Diluted	$ (5.40)	[1]	$ (0.27)	[1]	$ 0.21	[1]	$ 0.05	[1]	$ (5.00)	[1]	$ 0.30	[1]	$ 0.23	[1]	$ 0.20	[1]	$ (5.39)	$ (4.20)	$ 0.24
Basic (in shares)																	448.0	458.0	466.7
Weighted Average Number of Shares Outstanding, Diluted																	448.0	458.0	468.3
Service [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Product and service revenue																	$ 9,789.7	$ 9,057.6	$ 11,445.9
Cost of product revenue																	7,767.2	7,452.7	9,433.1
Product [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Product and service revenue																	3,352.9	3,272.6	3,416.4
Cost of product revenue																	$ 3,015.6	2,676.9	2,954.3
Previously Reported [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Total revenue																		12,552.9	15,056.9
Total costs and expenses																		13,470.5	14,091.7
Net Income (Loss) Attributable to Parent																		$ (1,921.6)	$ 113.3
Basic earnings (loss) per share (usd per share)																		$ (4.20)	$ 0.24
Earnings Per Share, Diluted																		$ (4.20)	$ 0.24
Basic (in shares)																		458.0	466.7
Weighted Average Number of Shares Outstanding, Diluted																		458.0	468.3
Previously Reported [Member] | Service [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Product and service revenue																		$ 9,765.0	$ 12,210.5
Cost of product revenue																		7,895.1	9,984.0
Previously Reported [Member] | Product [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Product and service revenue																		2,565.2	2,651.8
Cost of product revenue																		2,234.5	$ 2,403.4
Restatement Adjustment
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Product and service revenue																		707.4
Basic earnings (loss) per share (usd per share)																			$ 0.24
Restatement Adjustment | Service [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Product and service revenue																		(707.4)	$ (764.6)
Cost of product revenue																		(442.4)	(550.9)
Restatement Adjustment | Product [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Product and service revenue																			764.6
Cost of product revenue																		$ 442.4	$ 550.9
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.