Borrowings (Details) $ in Millions							3 Months Ended
	Jul. 11, 2016	Jan. 11, 2016 USD ($) contract	Nov. 02, 2015 USD ($) contract	Sep. 28, 2015 USD ($)	Jan. 11, 2015 USD ($)	Dec. 12, 2014 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Line of Credit Facility [Line Items]
Long-term borrowings							$ 4,654.0		$ 69.9
Short-term borrowings							2,211.3		1,511.5
Borrowing, Long-term and Short-term ,Combined Amount							6,865.3		1,581.4
Repayment of lines of credit							(995.1)	$ (535.2)
January 2015 Facility Agreement
Line of Credit Facility [Line Items]
Facility agreement initiation date					Jan. 11, 2015
Facilitiy agreement total amount					$ 850.0
Facility agreement expiration date	Jul. 11, 2016				Jan. 10, 2016
Short-term borrowings							0.0		750.0
Repayment of lines of credit				$ (100.0)
January 2016 Facilities Agreement
Line of Credit Facility [Line Items]
Facility agreement initiation date		Jan. 11, 2016
Facilitiy agreement total amount		$ 18,000.0
Number of term loan facilities | contract		2
November 2015 Facilities Agreement
Line of Credit Facility [Line Items]
Facility agreement initiation date			Nov. 02, 2015
Facilitiy agreement total amount			$ 5,600.0
Number of term loan facilities | contract			3
Long-term borrowings							4,589.7		0.0
Short-term borrowings							987.5		0.0
November 2015 Facility A | November 2015 Facilities Agreement
Line of Credit Facility [Line Items]
Facility agreement expiration date			Nov. 02, 2016
Term loan facility			$ 1,000.0
November 2015 Facility B | November 2015 Facilities Agreement
Line of Credit Facility [Line Items]
Facility agreement expiration date			Nov. 02, 2017
Term loan facility			$ 2,200.0
November 2015 Facility C | November 2015 Facilities Agreement
Line of Credit Facility [Line Items]
Facility agreement expiration date			Nov. 02, 2018
Term loan facility			$ 2,400.0
January 2016 Facility B | January 2016 Facilities Agreement
Line of Credit Facility [Line Items]
Facility agreement expiration date		Jan. 11, 2017
Term loan facility		$ 5,000.0
January 2016 Facility A | January 2016 Facilities Agreement
Line of Credit Facility [Line Items]
Facility agreement expiration date		Jan. 11, 2017
Term loan facility		$ 13,000.0
Revolving Credit Facility
Line of Credit Facility [Line Items]
Facility agreement initiation date						Dec. 12, 2014
Facility agreement expiration date						Dec. 12, 2020
Swingline Facility						$ 250.0
Principal amount						$ 2,100.0
Short-term borrowings							1,210.0		750.0
Secured Non-recourse Debts
Line of Credit Facility [Line Items]
Long-term borrowings							64.3		69.9
Short-term borrowings							$ 13.8		$ 11.5