Borrowings (Details) € in Millions, SFr in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2015 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2016 CHF (SFr)	Jun. 30, 2015 EUR (€)	Mar. 31, 2015 USD ($)	Feb. 28, 2014 USD ($)
Commercial Paper			$ 1,299.3	$ 0.0
Short-term borrowings and current maturities of long-term debt			$ (1,937.4)	(6.1)
Short-term Debt, Weighted Average Interest Rate			0.59%
Repayments of Long-term Debt	$ 1,950.0	$ 1,000.0	$ 0.2	1,955.7	$ 1,034.8
Extinguishment of Debt, Amount	1,650.0
Gains (Losses) on Extinguishment of Debt			0.0	166.7	0.0
Notes Payable			8,776.5	7,700.1
Other Notes Payable			14.4	23.1
Unamortized Debt Issuance Expense			(37.5)	(37.1)
Long-term Debt, Fair Value Adjustment			252.5	292.4
Debt, Long-term and Short-term, Combined Amount			10,305.2	7,978.5
Long-term debt			$ 8,367.8	7,972.4
Description of Derivative Activity Volume Percent			35.00%
Proceeds from issuance of long-term debt			$ 1,206.6	4,454.7	992.9
Long-term Debt			9,005.9	7,978.5
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months			635.3
Long-term Debt, Maturities, Repayments of Principal in Year Two			999.2
Long-term Debt, Maturities, Repayments of Principal in Year Three			603.0
Long-term Debt, Maturities, Repayments of Principal in Year Four			1.6
Long-term Debt, Maturities, Repayments of Principal in Year Five			0.5
Line of Credit Facility, Remaining Borrowing Capacity			2,870.0
Line of Credit Facility, Amount Outstanding			0.0	0.0
Interest Paid, Net			$ 146.4	$ 129.6	$ 140.4
Debt Instrument, Interest Rate, Effective Percentage			2.51%	2.67%
Maturity Date, 2020 [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,200.0
Maturity Date, 2017 [Member]
Line of Credit Facility, Maximum Borrowing Capacity			1,500.0
Maturity Date, 2019 [Member]
Debt Instrument, Interest Rate, Stated Percentage									1.95%
Long-term Debt									$ 600.0
Maturity Date, 2018 [Member]
Debt Instrument, Interest Rate, Stated Percentage						0.00%		1.25%
Long-term Debt						SFr 200.0		$ 600.0
Maturity Date, 2024 [Member]
Debt Instrument, Interest Rate, Stated Percentage						0.15%
Long-term Debt | SFr						SFr 600.0
Maturity Date, 2028 [Member]
Debt Instrument, Interest Rate, Stated Percentage						0.45%
Long-term Debt | SFr						SFr 400.0
Swiss Franc-Denominated Debt Issuance [Member]
Proceeds from issuance of long-term debt			$ 1,210.0
Maturity Date, 2025 [Member]
Debt Instrument, Interest Rate, Stated Percentage								2.75%
Long-term Debt								$ 800.0
Maturity Date, 2045 [Member]
Debt Instrument, Interest Rate, Stated Percentage								3.70%
Long-term Debt								$ 800.0
Maturity Date, 2022 [Member] [Member]
Debt Instrument, Interest Rate, Stated Percentage							1.00%
Long-term Debt | €							€ 600.0
Maturity Date, 2026 [Member]
Debt Instrument, Interest Rate, Stated Percentage							1.63%
Long-term Debt | €							€ 750.0
Maturity Date, 2030 [Member]
Debt Instrument, Interest Rate, Stated Percentage							2.13%
Long-term Debt | €							€ 750.0
Euro-Denominated Debt Issuance [Member]
Proceeds from issuance of long-term debt	2,270.0
Maturity Date, 2044 [Member]
Debt Instrument, Interest Rate, Stated Percentage									4.65%
Long-term Debt									$ 400.0
Reported Value Measurement [Member]
Extinguishment of Debt, Amount	$ 1,780.0
Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage			0.00%
Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage			7.13%