Financing (Components Of Debt) (Details) € in Millions, SFr in Millions, $ in Millions, ¥ in Billions	Sep. 28, 2018 CHF (SFr)	Sep. 28, 2018 JPY (¥)	Sep. 28, 2018 USD ($)	Sep. 28, 2018 EUR (€)	Dec. 31, 2017 CHF (SFr)	Dec. 31, 2017 JPY (¥)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)
Debt Instrument [Line Items]
Long-term debt			$ 10,617.8				$ 10,522.1
Less: currently payable			59.8				194.7
Long-term debt excluding currently payable			10,558.0				10,327.4
Other
Debt Instrument [Line Items]
Long-term debt			55.0				208.6
Commercial paper
Debt Instrument [Line Items]
Long-term debt			3,300.0
Commercial paper | U.S. dollar-denominated commercial paper
Debt Instrument [Line Items]
Long-term debt			0.0				436.9
Commercial paper | Euro-denominated commercial paper (€2.9 billion and €1.7 billion, respectively)
Debt Instrument [Line Items]
Long-term debt			3,324.3	€ 2,900.0			1,993.9	€ 1,700.0
Senior notes | 1.65% senior unsecured notes due 2018 (the “2018 U.S. Notes”)
Debt Instrument [Line Items]
Long-term debt			$ 0.0				499.2
Interest rate of debt instrument	1.65%	1.65%	1.65%	1.65%
Senior notes | 1.0% senior unsecured notes due 2019 (€600.0 million aggregate principal amount) (the “2019 Euronotes”)
Debt Instrument [Line Items]
Long-term debt			$ 695.6				718.4
Interest rate of debt instrument	1.00%	1.00%	1.00%	1.00%
Debt instrument, face value | €				€ 600.0				600.0
Senior notes | 2.4% senior unsecured notes due 2020
Debt Instrument [Line Items]
Long-term debt			$ 498.3				497.7
Interest rate of debt instrument	2.40%	2.40%	2.40%	2.40%
Senior notes | 5.0% senior unsecured notes due 2020 (the “2020 Assumed Pall Notes”)
Debt Instrument [Line Items]
Long-term debt			$ 390.5				394.6
Interest rate of debt instrument	5.00%	5.00%	5.00%	5.00%
Senior notes | 0.352% senior unsecured notes due 2021 (¥30.0 billion aggregate principal amount) (the “2021 Yen Notes”)
Debt Instrument [Line Items]
Long-term debt			$ 263.5				265.5
Interest rate of debt instrument	0.352%	0.352%	0.352%	0.352%
Debt instrument, face value | ¥		¥ 30.0				¥ 30.0
Senior notes | 1.7% senior unsecured notes due 2022 (€800.0 million aggregate principal amount) (the “2022 Euronotes”)
Debt Instrument [Line Items]
Long-term debt			$ 924.8				955.6
Interest rate of debt instrument	1.70%	1.70%	1.70%	1.70%
Debt instrument, face value | €				€ 800.0				800.0
Senior notes | Floating rate senior unsecured notes due 2022 (€250.0 million aggregate principal amount) (the “Floating Rate 2022 Euronotes”)
Debt Instrument [Line Items]
Long-term debt			$ 289.4				299.1
Debt instrument, face value | €				€ 250.0				250.0
Senior notes | 2.5% senior unsecured notes due 2025 (€800.0 million aggregate principal amount) (the “2025 Euronotes”)
Debt Instrument [Line Items]
Long-term debt			$ 924.4				955.6
Interest rate of debt instrument	2.50%	2.50%	2.50%	2.50%
Debt instrument, face value | €				€ 800.0				800.0
Senior notes | 3.35% senior unsecured notes due 2025
Debt Instrument [Line Items]
Long-term debt			$ 496.7				496.3
Interest rate of debt instrument	3.35%	3.35%	3.35%	3.35%
Senior notes | 0.3% senior unsecured notes due 2027 (¥30.8 billion aggregate principal amount) (the “2027 Yen Notes”)
Debt Instrument [Line Items]
Long-term debt			$ 270.1				272.2
Interest rate of debt instrument	0.30%	0.30%	0.30%	0.30%
Debt instrument, face value | ¥		¥ 30.8				30.8
Senior notes | 1.2% senior unsecured notes due 2027 (€600.0 million aggregate principal amount) (the “2027 Euronotes”)
Debt Instrument [Line Items]
Long-term debt			$ 690.8				714.1
Interest rate of debt instrument	1.20%	1.20%	1.20%	1.20%
Debt instrument, face value | €				€ 600.0				€ 600.0
Senior notes | 0.65% senior unsecured notes due 2032 (¥53.2 billion aggregate principal amount) (the “2032 Yen Notes”)
Debt Instrument [Line Items]
Long-term debt			$ 466.4				470.2
Interest rate of debt instrument	0.65%	0.65%	0.65%	0.65%
Debt instrument, face value | ¥		¥ 53.2				¥ 53.2
Senior notes | 4.375% senior unsecured notes due 2045
Debt Instrument [Line Items]
Long-term debt			$ 499.3				499.3
Interest rate of debt instrument	4.375%	4.375%	4.375%	4.375%
Bonds | 0.5% senior unsecured bonds due 2023 (CHF 540.0 million aggregate principal amount) (the “2023 CHF Bonds”)
Debt Instrument [Line Items]
Long-term debt			$ 551.8				555.5
Interest rate of debt instrument	0.50%	0.50%	0.50%	0.50%
Debt instrument, face value | SFr	SFr 540.0				SFr 540.0
Bonds | 1.125% senior unsecured bonds due 2028 (CHF 210.0 million aggregate principal amount) (the “2028 CHF Bonds”)
Debt Instrument [Line Items]
Long-term debt			$ 218.6				220.3
Interest rate of debt instrument	1.125%	1.125%	1.125%	1.125%
Debt instrument, face value | SFr	SFr 210.0				SFr 210.0
Convertible debt | Zero-coupon Liquid Yield Option Notes (LYONs) due 2021
Debt Instrument [Line Items]
Long-term debt			$ 58.3				$ 69.1
Interest rate of debt instrument	0.00%	0.00%	0.00%	0.00%