Financing (Components Of Debt) (Details) € in Millions, SFr in Millions, ¥ in Billions	Mar. 29, 2019 CHF (SFr)	Mar. 29, 2019 JPY (¥)	Mar. 29, 2019 USD ($)	Mar. 29, 2019 EUR (€)	Dec. 31, 2018 CHF (SFr)	Dec. 31, 2018 JPY (¥)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 EUR (€)
Debt Instrument [Line Items]
Long-term debt			$ 9,494,800,000				$ 9,740,300,000
Less: currently payable			36,600,000				51,800,000
Long-term debt excluding currently payable			9,458,200,000				9,688,500,000
Other
Debt Instrument [Line Items]
Long-term debt			50,600,000				66,700,000
Commercial paper | U.S. dollar-denominated commercial paper
Debt Instrument [Line Items]
Long-term debt			0				72,800,000
Commercial paper | Euro-denominated commercial paper
Debt Instrument [Line Items]
Long-term debt			2,327,000,000	€ 2,100.0			2,377,500,000	€ 2,100.0
Senior notes | 1.0% senior unsecured notes due 2019
Debt Instrument [Line Items]
Long-term debt			$ 672,700,000				687,000,000
Interest rate of debt instrument	1.00%	1.00%	1.00%	1.00%
Debt instrument, face value			$ 673,000,000	€ 600.0				600.0
Senior notes | 2.4% senior unsecured notes due 2020
Debt Instrument [Line Items]
Long-term debt			$ 498,700,000				498,500,000
Interest rate of debt instrument	2.40%	2.40%	2.40%	2.40%
Senior notes | 5.0% senior notes due 2020
Debt Instrument [Line Items]
Long-term debt			$ 386,600,000				386,700,000
Interest rate of debt instrument	5.00%	5.00%	5.00%	5.00%
Senior notes | 0.352% senior unsecured notes due 2021
Debt Instrument [Line Items]
Long-term debt			$ 270,200,000				273,200,000
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
Debt Instrument [Line Items]
Long-term debt			$ 894,100,000				913,200,000
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
Debt Instrument [Line Items]
Long-term debt			$ 279,700,000				285,700,000
Debt instrument, face value | €				€ 250.0				250.0
Senior notes | 2.5% senior unsecured notes due 2025
Debt Instrument [Line Items]
Long-term debt			$ 893,400,000				912,600,000
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			$ 496,900,000				496,800,000
Interest rate of debt instrument	3.35%	3.35%	3.35%	3.35%
Senior notes | 0.3% senior unsecured notes due 2027
Debt Instrument [Line Items]
Long-term debt			$ 276,900,000				279,900,000
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
Debt Instrument [Line Items]
Long-term debt			$ 667,600,000				682,000,000
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
Debt Instrument [Line Items]
Long-term debt			$ 478,100,000				483,400,000
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			$ 499,400,000				499,300,000
Interest rate of debt instrument	4.375%	4.375%	4.375%	4.375%
Convertible debt | Zero-coupon LYONs due 2021
Debt Instrument [Line Items]
Long-term debt			$ 44,300,000				56,200,000
Interest rate of debt instrument	0.00%	0.00%	0.00%	0.00%
Bonds | 0.5% senior unsecured bonds due 2023
Debt Instrument [Line Items]
Long-term debt			$ 543,400,000				550,700,000
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
Debt Instrument [Line Items]
Long-term debt			$ 215,200,000				$ 218,100,000
Interest rate of debt instrument	1.125%	1.125%	1.125%	1.125%
Debt instrument, face value | SFr	SFr 210.0				SFr 210.0